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title, docType, templateVersion
title docType templateVersion
Application Rationalisation APPR 1.0

Application Rationalisation

Document Control

Field Value
Document ID ARC-[PROJECT_ID]-APPR-v[VERSION]
Document Type Application Rationalisation
Project [PROJECT_NAME]
Classification [CLASSIFICATION]
Status DRAFT
Version [VERSION]
Created [YYYY-MM-DD]
Last Modified [YYYY-MM-DD]
Review Cycle Quarterly during active rationalisation programme
Next Review Date [YYYY-MM-DD]
Owner [OWNER_NAME_AND_ROLE]
Reviewed By [REVIEWER_NAME]
Approved By [APPROVER_NAME]
Distribution [DISTRIBUTION_LIST]

Revision History

Version Date Author Description Reviewer Approver
[VERSION] [YYYY-MM-DD] ArcKit AI Initial creation from /arckit:application-rationalization command [REVIEWER_NAME] [APPROVER_NAME]

1. Rationalisation Summary

Decision Count Applications
Keep [N] [App-1, App-2, ...]
Merge [N] [App-3, App-4 (→ target), ...]
Replace [N] [App-5, App-6, ...]
Retire [N] [App-7, App-8, ...]

Overall Portfolio: [N] applications assessed → [N] decisions rendered Target reduction: [X]% fewer applications post-rationalisation

2. Per-Application Decisions

APP-001: [Application Name] — [KEEP / MERGE / REPLACE / RETIRE]

  • Capability: [Primary capability served]
  • Strategic Fit: [Strategic / Critical / Support]
  • Technical Condition: [Modern / Aging / Legacy]
  • Business Value: [High / Medium / Low]
  • Current Cost: [£X/year — license, maintenance, infrastructure, FTE]
  • Rationale: [Why this decision — reference principles, strategy, BPCM alignment]
  • Migration Approach: [Lift-shift / Replatform / Refactor / Retire / Consolidate]
  • Target Platform (if Replace/Merge): [Platform name]
  • Timeline: [Q1 2026 / Wave 1, etc.]
  • Estimated Cost: [£X]
  • Risk Level: [Low / Medium / High]
  • Dependencies: [Upstream/downstream applications affected]
  • Owner: [Application owner / business sponsor]

APP-002: [Application Name] — [KEEP / MERGE / REPLACE / RETIRE]

  • Capability: [Primary capability served]
  • Strategic Fit: [Strategic / Critical / Support]
  • Technical Condition: [Modern / Aging / Legacy]
  • Business Value: [High / Medium / Low]
  • Current Cost: [£X/year — license, maintenance, infrastructure, FTE]
  • Rationale: [Why this decision]
  • Migration Approach: [Lift-shift / Replatform / Refactor / Retire / Consolidate]
  • Target Platform (if Replace/Merge): [Platform name]
  • Timeline: [Q1 2026 / Wave 1, etc.]
  • Estimated Cost: [£X]
  • Risk Level: [Low / Medium / High]
  • Dependencies: [Upstream/downstream applications affected]
  • Owner: [Application owner / business sponsor]

APP-003: [Application Name] — [KEEP / MERGE / REPLACE / RETIRE]

  • Capability: [Primary capability served]
  • Strategic Fit: [Strategic / Critical / Support]
  • Technical Condition: [Modern / Aging / Legacy]
  • Business Value: [High / Medium / Low]
  • Current Cost: [£X/year — license, maintenance, infrastructure, FTE]
  • Rationale: [Why this decision]
  • Migration Approach: [Lift-shift / Replatform / Refactor / Retire / Consolidate]
  • Target Platform (if Replace/Merge): [Platform name]
  • Timeline: [Q1 2026 / Wave 1, etc.]
  • Estimated Cost: [£X]
  • Risk Level: [Low / Medium / High]
  • Dependencies: [Upstream/downstream applications affected]
  • Owner: [Application owner / business sponsor]

[Continue for each application in inventory...]

3. Portfolio Target State

Target Distribution

Decision Category Count Percentage
Keep [N] [X]%
Merge [N] [X]%
Replace [N] [X]%
Retire [N] [X]%
Total [N] 100% 
pie title Target Portfolio Distribution
    "Keep": 40
    "Merge": 15
    "Replace": 30
    "Retire": 15

Capability Coverage

Capability Current Apps Target Apps Decision
[Capability A] [N] [N] [Consolidated]
[Capability B] [N] [N] [Unchanged]
[Capability C] [N] [N] [New replacement needed]

4. Consolidation Benefits

Benefit Area Estimated Value Confidence Notes
License reduction £[X]/year [High/Med/Low] [Detail]
Maintenance savings £[X]/year [High/Med/Low] [Detail]
Operational efficiency [X]% reduction [High/Med/Low] [Detail]
Infrastructure consolidation £[X]/year [High/Med/Low] [Detail]
Security posture improvement [Qualitative] [High/Med/Low] [Detail]
Total estimated annual benefit £[X]/year — —

Return on Investment: [X] months to realise savings vs. total rationalisation investment of £[X]

5. Risk Register

# Risk Affected App(s) Likelihood Impact Mitigation
1 [Business disruption during migration] [APP-XXX] [Low/Med/High] [Low/Med/High] [Mitigation plan]
2 [Data loss during consolidation] [APP-XXX] [Low/Med/High] [Low/Med/High] [Mitigation plan]
3 [Integration dependency breakdown] [APP-XXX] [Low/Med/High] [Low/Med/High] [Mitigation plan]
4 [Vendor non-cooperation on contract termination] [APP-XXX] [Low/Med/High] [Low/Med/High] [Mitigation plan]
5 [Staff skills gap for new platform] [APP-XXX] [Low/Med/High] [Low/Med/High] [Mitigation plan]

6. Implementation Sequencing

gantt
    title Rationalisation Implementation Plan
    dateFormat YYYY-MM-DD
    section Wave 1 — Quick Wins
    Retire legacy apps     :done, wave1a, 2026-04-01, 90d
    Merge duplicates       :active, wave1b, 2026-04-01, 120d
    section Wave 2 — Foundation
    Platform preparation   :wave2a, 2026-07-01, 90d
    Data migration planning :wave2b, 2026-07-01, 60d
    section Wave 3 — Transformation
    Replace strategic apps :wave3a, 2026-10-01, 180d
    Integrate replacements  :wave3b, 2026-10-01, 120d
    section Wave 4 — Optimisation
    Final rationalisation  :wave4a, 2027-04-01, 90d
    Performance tuning     :wave4b, 2027-04-01, 60d

Wave Details

Wave Focus Duration Apps Key Milestone
1 — Quick Wins Low-risk retirements and clear merges [N] months [N] apps [Milestone]
2 — Foundation Platform readiness and data prep [N] months [N] apps [Milestone]
3 — Transformation Major replacements and migrations [N] months [N] apps [Milestone]
4 — Optimisation Final rationalisation and tuning [N] months [N] apps [Milestone]

7. Traceability

Source Artifact Document Link/Reference
Application Portfolio ARC-[P]-APP-v[N].md [Direct reference]
Business Capability Model ARC-[P]-BPCM-v[N].md [Capability alignment]
Architecture Principles ARC-000-PRIN-v[N].md [Principle references]
Architecture Decisions ARC-[P]-ADR-*.md [Decision references]

8. Assumptions

  1. [Application inventory is complete and up to date]
  2. [Business sponsors will approve decisions within 30 days]
  3. [Budget envelope of £[X] available for rationalisation programme]

9. Decisions Pending Approval

Decision App Status Required By
[Pending decision] [APP-XXX] Awaiting sponsor approval [YYYY-MM-DD]

Generated by: ArcKit /arckit:application-rationalization command Generated on: [DATE] [TIME] GMT ArcKit Version: {ARCKIT_VERSION} Project: [PROJECT_NAME] (Project [PROJECT_ID]) AI Model: [MODEL_NAME] Generation Context: [Brief note about source documents used]

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