Principal-led architecture for critical systems

Decision guide

Legacy Modernization Evidence Inventory

An inventory of application, database, integration, workflow, testing, operational, and ownership evidence for a safer modernization decision.

Decision resourceUse the artifact with a named owner
Resource type
Decision guide
Version
1.48.0
Decision
A team wants to estimate or modernize a legacy system without knowing which evidence must be collected first.

Purpose and use

A team wants to estimate or modernize a legacy system without knowing which evidence must be collected first.

Who should use it

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

Decision supported

A team wants to estimate or modernize a legacy system without knowing which evidence must be collected first.

System evidence

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.

  • Applications, repositories, branches, frameworks, and build paths
  • Databases, schemas, stored procedures, jobs, reports, and retention
  • Interfaces, file exchanges, vendors, and scheduled dependencies
  • Environments, deployment, configuration, secrets handling, and monitoring

Behavior evidence

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.

  • Critical workflows and exception paths
  • Calculations, approvals, permissions, and reports
  • Representative production scenarios and historical defects
  • Manual workarounds and domain-owner knowledge
  • Comparison and reconciliation rules

Decision evidence

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.

  • Business and technical owners
  • Continuity, downtime, and rollback constraints
  • Unsupported components and key-person risks
  • Known unknowns and disputed behavior
  • Acceptance criteria by modernization seam
Usage boundary: An evidence inventory, not a complete assessment or estimate.

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.

Private local search

Find a service, capability, evidence record, resource, or insight

Press / to open search when focus is not in a form field.

Search runs locally against the public site index.