Financial Services
›
Financial Services & Banking
›
Core Banking Systems
Core Banking Modernization
Regulated environments where trust, compliance, and operational resilience are non-negotiable.
Temenos
Finastra
Jack Henry
FIS
Inside this journey
-
Pre-Discovery
Align decision-makers, timelines, and risk tolerance before deeper discovery.
-
Stakeholder Alignment
Confirm decision roles, migration risk tolerances, timelines, and success metrics across executive and operational stakeholders.
Alignment Questions
Opening: Why We're Here (a quick orientation)
- To make sure we're focused, what's the single most important reason you're exploring a core modernization right now?
- What is your role and how long have you owned responsibility for the core platform?
- How long has modernization been on your roadmap?
- Which business outcomes are you pushing to achieve first (pick up to three)?
- At the end of today’s conversation, what would make you feel this was time well spent?
Are you willing to let the legacy system keep winning?
- If you do nothing for another 24 months, what concrete things will be harder or impossible to do?
- Which recent event made you rethink 'we can wait'—an outage, a compliance ask, customer churn, vendor sunset, or something else?
- How often do legacy failures create customer-facing issues (e.g., posting delays, statement errors, payment failures)?
- When those failures happen, how does it feel internally—embarrassing, dangerous, normal, or something else? Tell me a recent example.
- What is the cost—operational or reputational—when these problems occur? Please quantify if you can (FTE hours, customer calls, fines, lost revenue).
Who gets to say yes (and who will quietly say no)?
- Who are the decision makers for a modernization program and who influences them informally?
- Which stakeholder groups are most nervous about migration (executive, regulators, operations, retail teams, third-party partners)?
- What does each key stakeholder worry about most—downtime, data loss, cost, vendor lock-in, or something else? Please map roles to concerns.
- Who owns the budget, and is there a separate budget for transformation versus run-the-bank costs?
- Has a regulator or external auditor ever flagged your core or reconciliation controls? If so, what was required and how was it resolved?
What in your plumbing is quietly holding the bank back?
- Describe the core architecture today—mainframe vs distributed, middleware, primary database, and any vendor products in the chain.
- Which systems must we integrate with during migration (choose all that apply)?
- How would you rate your current data quality and master data hygiene for accounts, customers, and balances?
- Tell me about your reconciliation processes today—manual, partially automated, daily vs real-time—and where they break down.
- What hidden or intermittent failure modes have you seen during end-of-day processing, cutovers, or heavy volumes?
If we could migrate one product without a single outage, which one would change how you run the bank?
- What are the top three measurable outcomes we'd need to show to prove success for a phased migration?
- What timeline would you consider realistic and acceptable for a single product line migration (e.g., deposits, loans, payments)?
- Which rollback or safety controls are non-negotiable for you (parallel run, transaction-level replay, manual overrides, legal hold)?
- What KPIs will you publish internally during and after migration to reassure the board and regulators?
- If we could show a validated migration scenario using your own data and a no-blame runbook, what would you ask to see first?
Picture the worst: what keeps you awake about migration?
- If a migration failed in a way that mattered, what would that failure look like to customers, regulators, and your executive team?
- Which processes, if disrupted even briefly, would create the largest regulatory or financial exposure?
- How confident are you in your current incident response and post‑mortem workflows to contain and remediate a migration incident?
- Who would be on your war room for a migration incident and what authority would they have?
- What traceability and audit artifacts do regulators expect—how complete must the migration trail be?
What would make you pull the trigger—real commitments and practical tests
- Do you have budget allocated today for a phased migration, and if so, what type is it?
- What procurement or contracting obstacles have stopped projects like this before (legal terms, vendor vetting, security posture, budget cycles)?
- Which commercial model would be easiest for your CFO to approve (subscription, fixed-price project, usage-based, hybrid)?
- What references, certifications, or regulator-facing artifacts would you need to see before recommending approval?
- What is your ideal timetable for starting a pilot or initial migration phase?
Small experiments that prove we can keep your lights on
- Which low-risk proof points would you accept to de‑risk a larger program (sandbox test with your data, reconciliation proof, parallel run on a segment)?
- What internal data or extracts can you make available for an early validation (sample accounts, transaction history, settlement files)?
- Who on your team can commit time to run an initial validation and who will be the primary contact we should schedule with?
- What would a successful pilot look like in terms of duration, scope, and acceptance criteria?
- When should we reconvene to review a proposed validation plan and next steps?
-
Current State Mapping
Document legacy core architecture, integrations, data quality, and failure modes that must be addressed for a phased migration.
Current State
Start Here: Describe Your Core in One Breath
- In one sentence, how would you describe your current core banking system and why it feels like a constraint today?
- Which vendor and major platform/version runs your core today?
- How long has your current core been in production without a substantive platform replacement?
- Roughly how many daily transactions and peak-hour TPS do you process (best estimate)?
- Which product lines are actively live on the core today (select all that apply)?
What Keeps You Up at Night About the Core?
- If your core suffered a severe outage tomorrow, what single outcome would be the most damaging to the bank?
- How often in the past 24 months have you experienced incidents that materially impacted customers or regulators?
- Tell us about a recent incident that exposed a core limitation—what happened, who noticed it first, and how was it resolved?
- When you imagine migration risk, which outcome feels least acceptable to leadership (CEO/board/CRO)?
- What current mitigations or compensating controls do you rely on when the core is unstable?
Hidden Knots: Integrations and Touchpoints
- How many mission‑critical upstream or downstream systems are you confident would break a planned phased cutover if not handled perfectly?
- List your top 6 integrations (by business criticality) and the vendor/owner for each (e.g., payments provider — vendor X; digital banking — internal team).
- Which integration patterns are in active use across those systems?
- For those integrations, who is responsible for updates and UAT: you (bank), third‑party vendor, or a partner?
- Have you experienced silent integration drift (working in production but out-of-spec) — and if so, how long did it go unnoticed?
- Which of these integration constraints worry you most during migration?
Where Your Data Hides Its Mess
- If we ran a forensic on your customer and ledger data, what surprise would you least want to find?
- Which data domains do you consider high-risk for conversion (select all that apply)?
- What portion of your historical transaction history do you plan to convert versus archive (best estimate)?
- Describe the data quality checks and reconciliation tests you run today and how often they pass without manual fixes.
- What is your single biggest worry about data lineage and the ability to demonstrate an accurate audit trail post-conversion?
When Things Break: Failure Modes That Matter
- Which recurring failure mode would you say has the highest probability of occurring during a phased migration?
- For the failure modes you selected, how quickly are they typically detected and by whom?
- What existing rollback or containment controls have you successfully used in past incidents?
- Tell us about a worst-case recovery you’ve executed: time to restore, effort required, and residual impact.
- What SLAs or maximum tolerances (hours, transactions lost, remediation cost) would the board consider a deal-breaker in migration?
Who Owns the Risk — And Who Would You Call at 2AM?
- If a migration incident escalated to regulatory attention, who in your organization would lead the response and why might that chain be fragile?
- Which internal teams will need to be fully available during cutover windows (select all that apply)?
- Do you have runbooks, playbooks, and tested incident response procedures specific to core migration scenarios?
- How much tribal/undocumented knowledge exists that a key employee would need to perform migration tasks?
- What external partners (integrators, vendors, consultants) must be on-call during cutover and do their contracts support that level of availability?
Phasing That Won't Surprise You
- What latent sequencing dependency could force you into a risky big-bang instead of the planned product-by-product approach?
- Which phasing model do you prefer and why would that choice align with your operational constraints?
- Which product lines would you consider for an early pilot and why (select up to 3)?
- What blockers (technical, contractual, staffing) prevent those product lines from being in an early wave?
- How much parallel-processing capability (dual-write, reconciliation automation) do you have today to support phased operations?
Controls, Compliance, and the Regulator’s Checklist
- If a regulator asked today for end-to-end evidence of control over a migrated account, would you be confident you could produce it?
- Which regulatory or supervisory frameworks are most relevant to your migration (select all that apply)?
- Do you have a pre-defined regulator notification and engagement plan for phased migrations?
- What evidence and artifacts would you insist are in place before signing off a migration wave (logs, reconciliation reports, executive sign-off, third-party attestations)?
- How comfortable is your compliance team with vendor-supplied controls, and what additional assurances would they require (SOC2, ISO, regulatory letters)?
What's Missing From Your Migration Plan?
- What single assumption in your migration plan would be catastrophic if it turned out to be false?
- Which unknowns would you want a vendor to validate before committing to a phased schedule (select up to 5)?
- Are you willing to provide sample datasets, runbooks, or integration specs for a joint technical assessment? If yes, describe access constraints.
- What would a credible initial success look like for a pilot wave (specific metrics, error thresholds, timeframe)?
- Realistically, what internal timeline flexibility do you have if a pilot uncovers major rework (select one)?
-
-
Customer Discovery
Clarify desired outcomes, regulatory constraints, budget, timelines, and measurable success signals for core modernization.
Discovery Questions
Start: The Story Behind Your Migration
- Tell us what specifically prompted you to consider replacing your core now—who raised it, and what was the tipping event?
- Which parts of your current core environment feel most constraining to growth or innovation today?
- How long have these constraints materially impacted new product launches or fintech integrations?
- Who internally has been most vocal about replacing the core, and what outcome are they most focused on (e.g., cost, agility, risk reduction)?
- If you could name one measurable business metric you expect to improve with a new core, what would it be?
Where It Really Hurts — Operational & Customer Impact
- If the core failed during a high-volume day, which customer groups and processes would feel it first—and what would that damage look like?
- Which customer journeys have had outages, errors, or manual workarounds in the last 24 months?
- How often do reconciliation errors or manual fixes require operations to intervene?
- Describe the most recent incident that required a significant manual workaround—what broke, who fixed it, and how long did it take?
- When incidents occur, what are the typical downstream impacts on customers, regulators, and the executive team?
- How would you characterize your operations team's sentiment toward replacing the core right now?
Are We Underestimating Migration Risk?
- What hidden assumptions might we be making about your legacy data, interfaces, or testability that could derail a migration?
- Which legacy systems must remain fully live during migration and cannot be taken offline even temporarily?
- Approximately how many distinct third-party integrations or external partners depend on your core?
- How many years of transaction history must be available or convertible for customers and regulators on day one of a switchover?
- Do you have known data quality issues (duplicates, inconsistent IDs, missing fields) we should expect to remediate, and how severe are they?
- Who currently owns data governance and what is the maturity of your reconciliation and validation processes?
- Which regulatory reporting feeds (e.g., CTRs, Call Reports, AML, FFIEC reports) are directly tied to the core and would need continuity?
Who's Really in the Room?
- If this project succeeds, who will be credited—and conversely, who has the power to block or stall it?
- Which executive stakeholders must sign off on scope, budget, and go-live?
- Which operational teams will be the day-to-day owners during migration (names or roles—ops, ledger, payments, security)?
- How are major IT procurement decisions made at your institution?
- When you evaluate core vendors, which credibility signals matter most?
- Are there internal champions we can engage now to accelerate alignment? If yes, who?
Price, Timeline, and the Red Lines
- If this project slips on budget or timeline, what are the real consequences—what would be unacceptable versus tolerable?
- What is the anticipated or allocated budget band for a phased core migration?
- What is your desired timing for pilot/first product migration and for completing the phased migration?
- Which deadlines are immovable (regulatory exams, contract expirations, board milestones)? Please list and date if possible.
- If forced to prioritize, which outcomes are absolutely non-negotiable?
- How would you describe your tolerance for schedule slippage and cost overruns?
Regulatory Reality Check
- What regulatory or compliance trigger would cause you to pause or halt a migration (e.g., a regulatory exam finding, audit gap)?
- Which regulators and examinations will this migration likely involve?
- Do you need prior regulatory approval, or is notification sufficient for this change?
- Which compliance controls or reporting processes must remain uninterrupted during migration (e.g., CTR/STR filing, call report cadence)?
- How mature are your internal compliance playbooks for vendor-led major system changes?
- Who will be the primary regulator-facing owner during migration activities?
Signals of Success — What We'll Measure Together
- If we announced this migration a success, what three measurable signals would convince your CEO and board?
- Select the KPIs that matter most to you (pick up to five).
- For the KPIs you selected, what absolute thresholds would you consider acceptable versus failing?
- How often do you want to review pilot and deployment metrics with our joint team?
- What monitoring or analytics tools do you currently use that we should integrate for shared dashboards?
- Who on your team should have decision rights vs read-only visibility into these metrics?
Early Obstacles and a Practical First Step
- What is the smallest, lowest-risk first migration we could run that would prove the approach without jeopardizing customers or regulators?
- Which single product line would you consider for a pilot that balances low risk with meaningful validation?
- What success criteria would you require to feel confident expanding from pilot to broader phases?
- How many internal FTEs or SMEs can you commit to run the pilot alongside our team?
- What would be an immediate stop condition for a pilot (i.e., what failure modes would halt progress)?
- Would you accept a vendor-managed pilot with joint runbooks, automated reconciliation, and rollback controls?
Legacy Data and Access — The Hidden Map
- How much institutional knowledge about account relationships, interfaces, or workarounds lives only with long-tenured staff or undocumented procedures?
- Do you have a canonical customer/account identifier used consistently across systems?
- Where is your primary transaction history stored and how accessible is it for conversion?
- How available are sanitized test extracts or synthetic datasets for development and QA?
- Are there legal, privacy, or consent constraints (state laws, customer consent) that limit data movement we should plan for?
- Would masked or synthetic data be acceptable for early-stage testing to avoid PII exposure?
Commitment & Next Steps — Who Needs to Do What
- If we agreed to a pilot today, who would need to sign off and what internal deadline would you set to start?
- Who on your side will own procurement and contracting for this engagement?
- Which internal approvals are required before starting a paid pilot?
- What's the earliest realistic date you could mobilize for a pilot if commercial terms are acceptable?
- What is the single most persuasive thing we could provide to help your stakeholders feel comfortable (e.g., reference visit, regulator letter, detailed runbook)?
- Before we prepare a proposal, are there any immediate questions, red flags, or deal-breakers you want us to address?
-
Solution Experience
Walk through validated migration scenarios using the bank’s context to confirm operational impact, rollback controls, and target outcomes.
Experience Meetings
- Solution Experience Alignment (Pre-Work Review)
- Deposit Products Migration Scenario Walkthrough
- Lending & Payments Migration Scenario Walkthrough
- Rollback, Reconciliation & Incident Tabletop
- Operational Acceptance & Pilot Sign-off
- Vendor to deliver a finalized rollback runbook, including decision thresholds and playbook steps.
- Introductions & Meeting Objectives
- Vendor to update migration script to incorporate agreed edge-case handling for deposit holds and interest posting.
- Customer to provide additional sample accounts that exercise identified edge cases.
- Both to schedule a dry-run for deposits using updated scripts within agreed window.
- Recap Preconditions & Scenario Objectives
- Validate that loan balances, interest, and payment flows are correct within agreed tolerances.
- Confirm settlements and downstream systems remain synchronized during and after cutover.
- Confirm regulatory reporting continuity and map any required audit trails.
- Customer to deliver representative loan portfolio extracts and payment routing docs.
- Vendor to produce reconciliation reports mapping pre- and post-migration values for loan and payment samples.
- Both parties to agree on additional payment channel test cases and schedule them.
- Agree regulator notification thresholds and who prepares filings or reports.
- Objectives & Defined Failure Modes
- Confirm explicit rollback runbook with owners, timing, and communications.
- Validate that automated reconciliation detects the failure modes and that manual escalation procedures are clear.
- Achieve a single-sentence current state agreed by customer and vendor.
- Customer to map and confirm escalation contacts and regulator reporting owner.
- Schedule a live dry-run of rollback and reconciliation for pre-production environment.
- Review of Success Signals & Acceptance Criteria
- Obtain mutual operational acceptance to proceed to the agreed pilot window or document clear blockers.
- Ensure monitoring, reconciliation, and escalation plans are in place and resourced for the pilot.
- Document any remaining open risks and assign owners with deadlines.
- Produce and circulate the Acceptance Report with pass/fail evidence and assigned remediation owners.
- Schedule the pilot cutover window and notify regulator if required by agreed thresholds.
- Enable monitoring dashboards and configure alerts for the pilot period.
- Assign incident and rollback owners for the pilot period and deliver contact list.
- Quantify the operational/regulatory/financial consequence and document numeric inputs.
- Agree a one-sentence future state that defines what 'better' looks like in operational terms.
- Secure signed-off data extracts, assumptions, and success signals for scenario proofing.
- Customer to deliver validated data extracts and sample records for scenarios (by owner and deadline).
- Vendor to produce scenario scripts mapped to the agreed future-state and success signals.
- Both parties to confirm attendees and schedule for product-specific walkthroughs.
- Quick Recap of Preconditions
- Demonstrate that deposit migration satisfies the agreed success signals under the bank's data and interfaces.
- Confirm precise rollback thresholds and owners for deposit cutovers.
- Surface any integration gaps or reconciliation rule adjustments required prior to pilot.
- Acceptance Checklist Execution (Deposits & Loans)
- Scenario Definition & Representative Samples
- Tabletop 1: Conversion Failure -> Rollback
- Scenario Scope & Success Signals
- Read-aloud: Current State (one sentence)
- Tabletop 2: Reconciliation Mismatch Investigation
- Monitoring, Alerts & SLA Enforcement Plan
- Proof Steps: Balances & Interest Calculations
- Step-by-Step Migration Proof (Diagnosis -> Proof)
- Consequence Quantification
- Regulatory Audit Trail & Reporting Readiness
- Future State Statement (one sentence)
- Proof Steps: Payments & Settlement Flows
- Escalation Matrix & Regulator Notification Triggers
- Operational Impact Review
- Regulatory & Reporting Validation
- Rollback Controls & Decision Points
- Post-Incident Validation & Resumption
- Data & Assumptions Sign-off
- Final Decision & Next Steps
- Success Signals & Acceptance Criteria
- Forced Validation & Tie-back
- Forced Validation & Confirmation
-
Solution Scope
Define the product-by-product migration plan, integrations, data conversion approach, responsibilities, and acceptance criteria.
Scope Configuration
- Cloud environment provisioning and network setup
- Data conversion and automated transaction reconciliation
- Historical transaction backfill for product line
- Deposit product migration (accounts, balances, interest, fees)
- Loan product migration (consumer and commercial portfolios)
- Real-time general ledger deployment and mapping
- Payments integration (ACH, RTP, card networks)
- API gateway and open banking connector deployment
- Digital banking and fintech API integrations
- Parallel processing enablement and dual-run reconciliation
- Regulatory reporting engine configuration and automation
- Security hardening and role-based access controls
- 24/7 managed operations, monitoring, and incident response
Scope Questions
Cloud environment provisioning and network setup
- Do you want the vendor to provision and operate the cloud environment or will you bring your own cloud (BYOC)?
- Which cloud provider(s) or private cloud environment will host the solution?
- What network connectivity model is required between the bank and vendor (select all that apply)?
- Describe expected latency, throughput, and peak transaction volumes that the network must support.
- Are there data residency, zonal availability, or regulatory hosting requirements (e.g., state-level restrictions)?
- Who will own IAM, VPC/network security, and firewall rules after handover?
Data conversion and automated transaction reconciliation
- Do you require full historical data conversion or a partial conversion (specify years or record types)?
- Approximately how many accounts and annual transactions will be converted (provide counts or ranges)?
- Which data objects must be converted and reconciled (select all that apply)?
- What is the expected data quality today (completeness, missing fields, known errors)?
- What reconciliation frequency and tolerance thresholds do you require (e.g., real-time, EOD, percent/dollar tolerance)?
- Who will own exception resolution for conversion mismatches (vendor, customer, or joint)?
Historical transaction backfill for product line
- Which product lines require historical transaction backfill?
- What backfill window is required for each product line (years or date ranges)?
- What source systems or export formats are available for historical data (legacy core export, DW extract, tapes, etc.)?
- Are there maintenance windows or business constraints that limit when backfill jobs can run?
- What acceptance criteria will be used to approve backfilled history (match %, exception counts, auditability)?
- Are there regulator or audit requirements governing retention or completeness of historical ledger/transaction data?
Deposit product migration (accounts, balances, interest, fees)
- Which deposit product types are in scope for migration?
- Do your deposit products require complex interest/tiers/promotions that must be replicated exactly?
- Will fee schedules, penalty rules, and reversal logic need to be migrated and validated?
- What cutover approach do you prefer for deposit products?
- Are there specific holds, float handling, or compliance holds to model (e.g., ACH holds, Reg CC) that affect balances?
- What quantitative acceptance criteria must be met for deposit migration (balance match %, transaction count, customer-facing validation)?
Loan product migration (consumer and commercial portfolios)
- Which loan portfolios are in scope (select all that apply)?
- Do loan records require recreation of amortization schedules, interest re-pricing, or historical payment waterfalls?
- Is collateral, lien, or document metadata required to migrate and preserve servicing continuity?
- Will loan servicing integrations (payment posting, escrow, collections) need to be updated or replaced?
- Provide approximate counts and age profile of loans in scope (e.g., volume by portfolio and vintage).
- What acceptance criteria will validate loan migration (payment accuracy, escrow balances, amort schedule match)?
Real-time general ledger deployment and mapping
- Is real-time posting to the general ledger required or will batched posting be acceptable?
- Describe your current chart of accounts complexity (number of segments, custom codes) or provide a sample.
- Who will provide and own mapping rules from core transactions to GL accounts?
- Which systems must publish entries to the GL in real time (select all that apply)?
- What reconciliation cadence and tolerance thresholds do you require between sub-ledgers and GL?
- Are there audit and retention rules or ERP integrations that affect GL implementation?
Payments integration (ACH, RTP, card networks)
- Which payment rails must be integrated at go-live?
- Do you currently use payment gateways, switches, or third-party processors that must remain in the loop?
- What settlement and reconciliation frequency is required for each rail (same-day, EOD, T+1)?
- Is card tokenization, PAN storage, or card network certification (PCI/PCI-SSC) required as part of the integration?
- Preferred connectivity method to payment partners (API, host-to-host SFTP, ISO8583 switch)?
- Do you require integrated fraud monitoring or third-party fraud vendor connections?
API gateway and open banking connector deployment
- Do you require an API gateway and developer portal to be deployed as part of scope?
- Which authentication and authorization standards must be supported?
- Is support for Open Banking / PSD2-style connectors required (third-party AIS/PIS integrations)?
- What peak and steady-state API request volumes do you expect (requests/sec or daily calls)?
- Are sandbox and developer onboarding capabilities required for fintech partners?
- Do you require rate limiting, quotas, and SLA enforcement per consumer or application?
Digital banking and fintech API integrations
- Which digital channels or fintech partners must be integrated at launch (select all that apply)?
- Do you require single sign-on (SSO) or identity federation between systems?
- How many distinct integrations (APIs/connectors) do you estimate will be required initially?
- Is there an existing API catalog and documentation for integrations, or will the vendor need to reverse-engineer interfaces?
- Do integrations require custom adapters/middleware or will standard REST connectors suffice?
- What data consistency SLA is required between core and digital channels (real-time, eventual consistency, EOD)?
Parallel processing enablement and dual-run reconciliation
- Do you plan to run a dual-run (parallel processing) period with the legacy core during migration?
- How long is the expected dual-run period per product line (days/weeks/months)?
- Which systems will participate in parallel processing and reconciliation (legacy core, payments, digital channels, GL)?
- Do you need automated reconciliation tooling provided by the vendor, or will you use an existing reconciliation system?
- What matching keys and tolerance rules should reconciliation use (account#, transaction id, amount tolerance)?
- What escalation and exception resolution SLAs are required during dual-run?
-
Mutual Commit
Finalize commercial terms, SLAs, governance, regulatory responsibilities, and readiness gates for phased deployment.
Agreement Modules
- Non-Disclosure Agreement (NDA)
- Master Services Agreement (MSA)
- Statement of Work (SOW)
- Commercial Terms & Payment Schedule
- Service Level Agreement (SLA)
- Data Processing Agreement (DPA)
- Regulatory Responsibility Addendum
- Implementation Governance & RACI
- Acceptance Criteria & Readiness Gates
- Rollback & Cutover Playbook
- Change Control & Change Order Agreement
- Third-Party Integration & Partner Annex
- Training & Knowledge Transfer Plan
- Escrow, Continuity & Warranty Terms
-
Deployment
Operationalize rollout with readiness checks, enablement, and outcome validation.
-
Pre-Deployment Readiness
Verify data extracts, test environments, access, reconciliation tooling, rollback plans, and regulator notification readiness.
Readiness Questions
Quick Check: Who’s in the Room (and who we absolutely need)?
- Who is the single accountable owner we should route cutover decisions to (name and role)?
- Which stakeholder roles should be invited to pre-deployment runbook reviews and the go/no‑go briefing?
- On a scale for planning purposes, when would you ideally schedule the first phased cutover window?
- Thinking of past projects, what’s one small win from a previous migration or major upgrade that gives your team confidence?
- Which of these product lines are in the initial migration scope for the upcoming phase?
What Keeps You Up at Night When Systems Go Quiet?
- If a migration caused a 2–4 hour delay in end‑of‑day posting, what would that mean for your bank—operationally and reputationally?
- How often have you seen customer-facing outages or account posting delays in the last 24 months?
- When those outages happened, which downstream impacts were most damaging?
- How does your leadership team emotionally respond to operational disruption—risk-averse and conservative, pragmatic and time-sensitive, or somewhere in between?
- Describe one past incident that still shapes your tolerance for migration risk—what happened and why does it matter today?
If One Dataset Went Missing, Which Would Break Everything?
- Which data domains do you consider mission-critical for same-day operations?
- How are production data extracts generated today for migration (select all that apply)?
- Do you have documented data lineage and authoritative sources for each critical dataset?
- When data issues have appeared during previous conversions, how long did it take you to detect and reconcile the discrepancy?
- Which reconciliation tools or teams do you rely on today (name tools and people if possible)?
Is Your Test Bed Actually Production in Disguise?
- How closely do your test environments mirror production in configuration, volume, and integrations?
- Do your test datasets include realistic customer volumes and edge-case records (e.g., legacy account numbers, inactive accounts, reversed transactions)?
- How many full dress rehearsal (end‑to‑end) runs have you performed against a migration playbook in the last 18 months?
- When you run rehearsals, which failure modes consistently show up and how do you typically respond?
- Which automated test coverage exists today for reconciliation, performance, and regulatory reporting?
Who Stops the Cutover When Something Feels Wrong?
- If unexpected production behavior emerges during cutover, who has unilateral authority to pause or abort the cutover?
- Describe the escalation path for critical incidents during the migration window (who gets paged, then who is accountable)?
- What communication channels will be used for urgent collaboration during cutover (choose all that apply)?
- Who is responsible for stakeholder and regulator notification in the first 60 minutes after a detected processing failure?
- How comfortable are frontline teams with the authority and steps to escalate—are there known cultural or procedural hangups?
Do We Have a Way Back—and Can We Trust It?
- Do documented rollback plans exist for each migration artifact (data extract, transformation, consumer-facing service)?
- Have rollback procedures been executed in a live or rehearsal scenario within the past year?
- What are your RTO (recovery time objective) and RPO (recovery point objective) targets for the cutover phase?
- Which external dependencies would block a successful rollback (payment networks, third-party processors, core vendor tools)? Please list.
- What evidence or checkpoints do you require to trust that a rollback restored a correct state (examples: reconciled balance reports, cleared transaction queues)?
Will Regulators, Auditors, and Customers Notice—and Will They Approve?
- Have you identified which regulators require notification for this migration phase and the required notice windows?
- What regulatory deliverables must remain uninterrupted during and immediately after cutover (e.g., FDIC/OCIF reports, CTRs, CRA data, AML feeds)?
- How will customer-facing anomalies be detected and triaged (automated monitoring, 24/7 support, branch escalation)?
- Do you have pre-written regulator and customer notification templates ready to send within the first hour of an incident?
- If regulators requested immediate proof of reconciliation after cutover, what artifacts could you produce within 2 hours?
If We Had to Launch Tomorrow, What Would Be Missing?
- Looking at people, process, and technology—what are the top three outstanding risks that must close before we schedule a cutover?
- For each identified gap, how long would your team estimate to remediate it?
- Which of the following readiness gates do you require formal sign-off on before go (select all that apply)?
- Who will sign the final go/no‑go decision and how will sign-off be documented?
- Would you commit to a final tabletop or dress rehearsal within 7 days of the proposed cutover window to validate readiness?
-
Deployment Enablement
Schedule and execute phased cutovers with clear owners, parallel processing steps, automated reconciliation, and escalation paths.
-
Validation Checklist
Confirm automated reconciliations, performance baselines, regulatory reporting, and customer-facing validations meet acceptance criteria.
Validation Questions
A Quick Intro: Your Current Focus
- Which of these best describes the immediate reason you’re exploring core modernization today?
- Briefly describe the one or two outcomes your CEO or board have most explicitly asked you to deliver with a core project.
- Who is the single executive most accountable for the decision to modernize?
- How would you characterize your institution’s cloud and API maturity today?
- Which core product lines are the top candidates for early migration at your bank?
What Keeps Your Heart Racing at 2 AM?
- If a migration went wrong tomorrow, what single outcome would cause the most damage — reputational, operational, or regulatory?
- Tell us about the last time your core caused real pain — what happened, which customers were affected, and how long it took to recover?
- How often do production incidents involving the core require manual intervention from senior IT or operations?
- When outages happen, how does it typically land politically inside the bank (board scrutiny, CEO escalation, regulator notification)?
- How do these risks feel to you emotionally—are you anxious, resigned, driven to change, or something else?
Where the Old Core Actually Breaks
- Which single architectural weakness in your legacy stack causes the most recurring operational burden?
- List the top three external systems (payments, digital banking, loan origination, etc.) where integrations are most fragile or risky.
- How would you rate the quality and completeness of your core data when it comes to customer records and balances?
- How are reconciliations handled today between the core and downstream systems and how long do they take to resolve on average?
- Where do you have the most customization or proprietary business logic that would complicate a product-by-product migration?
The People Puzzle: Who Holds the Keys?
- If we asked who would have to sign off on a phased migration at each gate, who are the three people whose approval is essential?
- Who owns day-to-day operations for the core (run), and who owns strategy/roadmap (change)?
- What internal teams must be involved for each product migration (example: payments, compliance, channels)?
- Tell us about any long-term vendor relationships or custom partnerships that might need contract renegotiation or coordination during migration.
- How many FTEs (internal staff) could you realistically allocate to migration tasks without jeopardizing BAU?
What Would You Stop Tolerating?
- If you had to draw a red line on acceptable migration risk, what precisely would you refuse to accept?
- What maximum acceptable window of degraded service or parallel-processing reconciliation would your execs tolerate for a product cutover?
- How confident are you that you can run dual systems in parallel for a phased migration without creating operational chaos?
- What rollback guarantees or controls would make you comfortable to proceed (testable rollback, frozen datasets, staged cutbacks)?
- Which stakeholder groups would veto a plan they perceive as too risky?
How Success Looks in Real Bank Terms
- If we removed the legacy core tomorrow and everything worked, what would be the three metrics you’d use to prove success in the first 12 months?
- Which of these operational KPIs are highest priority for you to improve post-migration?
- What target reduction in total cost of ownership (TCO) would you consider a win within three years?
- How would improved regulatory automation change your relationship with examiners—fewer questions, less frequent reporting, or faster remediation?
- What customer experience improvements would prove the migration was worth it (examples: faster onboarding, fewer declined payments, real-time balances)?
The Migration Playbook You'd Trust
- What about typical vendor migration playbooks makes you skeptical rather than reassured?
- Which migration cadence do you believe fits your org: product-by-product with parallel processing, module-by-module, or a different pattern?
- What specific expectations do you have for data conversion methodology (field-by-field mapping, automated reconciliation, sampling, full record reconciliation)?
- What minimum set of test environments and test data fidelity do you require before any cutover (dev/stage/prod parity, live masked data, regulator sightlines)?
- Which reconciliation metrics would you need automated and reported daily during cutovers (matching rate, exception count, time-to-resolve)?
What Would Make a Vendor Feel Like Family?
- What is the single most important signal that a vendor is stable and trustworthy for a 15–20 year partnership?
- Which types of references would move you most: a bank of similar size, a similar product migration, or a regulator-reviewed case study?
- How important are vendor-run managed services for you versus in-house operations after migration?
- What SLA and governance elements would make you comfortable (uptime %, response time, dedicated governance cadence, escalation paths)?
- What security, compliance, or audit evidence do you require up front (SOC2, ISO27001, penetration test reports, regulator-friendly documentation)?
Regulators, Budgets, and the Calendar — Your Non-Negotiables
- What regulatory constraints or examiner expectations would immediately rule out a proposed migration approach?
- What is your procurement and budget timeline for a modernization project (RFP, pilots, procurement, board approval)?
- What absolute budget range would you consider for a phased multi-year core migration (ballpark)?
- Are there regulatory notification or approval gates that must be satisfied before any cutover window?
- Which internal procurement or legal terms are deal-breakers for you (indemnity, data ownership, liability cap, audit rights)?
What Small Step Would Build Big Confidence?
- Would you be open to a narrow pilot (one product, subset of customers) to validate the migration approach before broader rollout?
- What would you require to call a pilot successful (specific metrics, zero customer-impact proof, regulator sign-off)?
- Who are the three people you would include in a pilot steering team to ensure decisions are made quickly?
- What communication cadence and artifacts make you feel safe during a pilot (daily dashboards, executive weekly briefing, live reconciliation reports)?
- Realistically, how soon could your team participate in an initial technical assessment or pilot?
-
-
Success
Review outcomes against success signals, capture lessons learned, and maintain a tracked backlog for issues and enhancements.
Success Reviews
- Success Outcomes Review
- Lessons Learned Retrospective
- Backlog Prioritization & Roadmap Sync
- Regulatory & Compliance Closeout
- Customer Success Quarterly Business Review (Post-Deployment)
Issues & Enhancements
- Compile a regulatory evidence packet (logs, reconciliation reports, test artifacts) and circulate to compliance and audit.
- Document a prioritized set of lessons and corresponding corrective actions.
- Assign owners and due-dates for process, tool, and training changes.
- Update the deployment playbook and runbooks to embed improvements.
- Deliver a retrospective report that includes top lessons, root causes, and recommended changes.
- Update standard operating procedures, runbooks, and cutover checklists with assigned owners.
- Organize targeted training or tabletop exercises for ops teams where gaps were identified.
- Backlog Intake Review
- Produce a prioritized backlog with owners, estimates, and target releases.
- Agree on acceptance criteria and test gating for each prioritized item.
- Lock a roadmap for the next 90–180 days with resource commitments.
- Create prioritized backlog tickets with acceptance criteria and initial estimates in the tracking tool.
- Publish a 90/180-day roadmap update to stakeholders and schedule roadmap checkpoints.
- Assign engineering and operations owners and confirm sprint/release allocation.
- Regulatory Obligations Recap
- Confirm all regulator commitments are met or have acceptable remediation plans.
- Assemble and agree the audit evidence package and sign-off owners.
- Establish a clear communications plan for regulator follow-up if required.
- Opening & Objectives
- Submit required notifications/filings to regulators and capture confirmation receipts.
- Document any open compliance mitigations in the tracked backlog with owners and SLAs.
- Executive Summary of Outcomes
- Demonstrate tangible business value delivered and validate ROI assumptions.
- Secure executive alignment and sponsorship for prioritized next-phase initiatives.
- Agree on timing and funding for roadmap items that unlock additional value.
- Deliver an executive one-page outcomes and ROI summary for the board and CEO.
- Obtain executive approval or commitment for the prioritized next-phase roadmap.
- Schedule quarterly follow-up cadence and assign executive sponsor for ongoing value tracking.
- Confirm which success signals have been met and which remain outstanding.
- Agree remediation actions, owners, and timelines for outstanding items.
- Document decisions that change deployment status or acceptance.
- Produce a one-page outcomes report mapping each success signal to measured status and evidence.
- Assign owners and SLAs for each outstanding gap and create ticket(s) in the tracked backlog.
- Schedule targeted follow-up checkpoints for high-risk remediation items.
- Context & Timeline Recap
- Recap of Agreed Success Signals
- What Went Well
- Financial Impact & TCO Update
- Evidence & Audit Trail Review
- Prioritization Criteria Refresh
- Open Compliance Risks & Mitigations
- Operational KPIs & Customer Experience
- Quantitative Outcome Review
- Triage & Prioritize Top Items
- What Didn't Go Well
- Define Acceptance Criteria & Test Strategy
- Root Cause Deep Dive (Top 3 Issues)
- Roadmap & Value Realization Plan
- Regulator Communication & Closure Plan
- Data Conversion & Reconciliation Results
- Roadmap & Resourcing Alignment
- Sign-off Requirements & Escalation Path
- Risks & Support Model
- Qualitative Outcome Review
- Improvement Ideas & Process Changes
- Gap Analysis & Root Cause Summaries
- Stakeholder Communication Plan
- Next Steps
- Decision & Owner Assignment
- Decision Points & Executive Asks