Module 18 · Lesson 98

Capstone architecture and control plan

Design source, calculation, control, output, documentation, and ownership layers before writing formulas.

The Capstone architecture and control plan mistake to catch

A diagram that omits manual inputs and external dependencies gives reviewers false confidence.

Capstone architecture and control plan: what Excel is actually doing

Capstone architecture maps source, staging, calculations, controls, outputs, and documentation. A control plan states what will be reconciled, when, by whom, and against which independent evidence.

Read this Capstone architecture and control plan example

Start with the business need: Map an auditable workbook structure, control totals, and test plan. Read each argument, reference, field, or control in the example before copying it into a larger model.

Inputs → Calculations → Controls → Dashboard → Handover

Evidence that your Capstone architecture and control plan result is trustworthy

An independent reviewer can trace every key result from the requirement to the source, formula, control, decision, and owner.

  • Explain how the result supports this task: Map an auditable workbook structure, control totals, and test plan.
  • Retain one known-result check and one boundary or exception check.
  • Record the source, period, unit, and refresh assumption beside the output.

Key takeaway: Draw the data flow and add one preventive, one detective, and one reconciliation control.