Interactive controls and validation

Why this lesson matters: Interactive controls and validation

Create drop-downs and linked formulas for controlled dashboard choices. In this module, the skill supports a larger goal: Turn accurate summaries into focused decision-ready reporting experiences. The practical application is to let a manager switch dashboard region safely.

=XLOOKUP(SelectedRegion,Region,Revenue)

Build it step by step

Work from the business question toward the formula or tool. Keep the source data separate from the output and make every important assumption visible to the reviewer.

• Define the audience, decision, and small set of measures.
• Build and reconcile the summary layer before drawing charts.
• Use consistent scales, labels, and exception cues.

Check the result and common failure points

Every chart and KPI should trace to a checked summary and make its period, unit, and comparison basis explicit. Also test a known record, a missing or blank value, and a boundary case. Confirm that ranges are the same size, units are consistent, and copied references move only where intended.

• Compare at least one result with a manual calculation or filtered source record.
• Test blanks, zeros, duplicates, errors, and the exact rule boundary.
• Reconcile row counts or totals before relying on the output.

Use the result in a decision

Let a manager switch dashboard region safely. Label the output clearly, state its period and unit, and explain the action it supports. A technically correct result is only complete when another person can understand, refresh, and review it.