Professional model review challenge

Professional model review challenge: what Excel is actually doing

A professional review tests logic, consistency, data lineage, controls, usability, documentation, security, and decision outputs. Findings need evidence, risk, owner, action, and status.

Read this Professional model review challenge example

Start with the business need: Complete an end-to-end workbook quality review. Read each argument, reference, field, or control in the example before copying it into a larger model.

=IF(ControlTotal=SourceTotal,"Balanced","Investigate")

The Professional model review challenge mistake to catch

Fixing formulas without recording what changed removes the audit trail and can reintroduce the same defect later.

Your desk challenge for lesson 96

Issue a pass, conditional pass, or fail recommendation supported by prioritised findings and control evidence.

• Make the existing calculation correct before optimising it.
• Reduce repetition with clear names and reusable logic.
• Trace, test, document, and protect the final workbook.