Principal-led architecture for critical systems

Decision guide

Modernization Risk Review

A pre-commitment review for legacy Microsoft modernization risk, parity evidence, reversibility, and decision ownership.

Decision resourceUse the artifact with a named owner
Resource type
Decision guide
Version
1.48.0
Decision
A modernization proposal exists, but the organization has not established what behavior, data, integrations, reporting, and operational constraints must remain intact.

Purpose and use

A modernization proposal exists, but the organization has not established what behavior, data, integrations, reporting, and operational constraints must remain intact.

Who should use it

Enterprise, Government, Partner decision owners, technical owners, reviewers, and delivery partners.

Decision supported

A modernization proposal exists, but the organization has not established what behavior, data, integrations, reporting, and operational constraints must remain intact.

Behavior and data

For each item, record the responsible owner, evidence, and whether the answer is Yes, Partly, No, Unknown, or Not applicable when the worksheet format supports it.

  • Identify critical calculations, approvals, permissions, exceptions, and reports
  • Trace rules across code, stored procedures, jobs, configuration, and manual workarounds
  • Define reconciliation and parity scenarios
  • Mark known, unknown, disputed, intentional, and accidental behavior

Architecture and operations

For each item, record the responsible owner, evidence, and whether the answer is Yes, Partly, No, Unknown, or Not applicable when the worksheet format supports it.

  • Inventory dependencies, vendors, environments, and integrations
  • Identify unsupported components and key-person risk
  • Define observability, rollback, and continuity constraints
  • Separate stabilization, seam creation, migration, and replacement

Commercial decision

For each item, record the responsible owner, evidence, and whether the answer is Yes, Partly, No, Unknown, or Not applicable when the worksheet format supports it.

  • Name the decision owner and acceptance basis
  • Estimate by bounded seam rather than whole-system optimism
  • Require explicit exclusions and client responsibilities
  • Prefer reversible phases with evidence between commitments
Usage boundary: A planning aid, not a substitute for source review, testing, security assessment, or a scoped modernization blueprint.

Next action

Bring the system, the trigger, and what cannot fail.

Start with public-safe context. Sensitive evidence moves only after fit, responsibility, scope, and an approved channel are clear.

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