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Short diagnostic hints for the two Practice on your own problems in this chapter. Attempt each problem before opening the hint. Complete answers appear in Appendix G of The Defensible Decision: Practice Workbook.
Problem 1 — the Copilot-generated churn dashboard
Restated: A support team asks Copilot for «a churn dashboard for the leadership meeting.» Copilot returns a page with (a) a large card labeled «Churn rate: 12.4%», (b) a bar chart of churn by product line, (c) a line chart of churn over the last six months, (d) a small table of top-five churned accounts. Name three plausible-looking failures on the page and the Part I principle each one violates.
Show a diagnostic hint
Diagnostic cue. Name the audience and decision first, then test whether the dashboard supplies the needed comparison, emphasis, and measure.
Complete answers appear in Appendix G of The Defensible Decision: Practice Workbook.
Problem 2 — the eleven-second dashboard
Restated: A colleague sends you a Power BI dashboard they built in eleven seconds via Copilot. They ask «does this look right?» Write the one-question response you would ask them, and the reason that question is the highest-leverage one to ask before you look at anything on the dashboard.
Show a diagnostic hint
Diagnostic cue. Ask for the audience and decision before reviewing a dashboard's visual craft.
Complete answers appear in Appendix G of The Defensible Decision: Practice Workbook.
Related on this site
- Chapter 1 companion page — Priya’s dashboard walkthrough, further reading, self-check quiz, and the hands-on Copilot-chart activity.
- Priya’s Q3 sales dataset — the aggregate rollups behind the two dashboards on the Chapter 1 companion page.
- All chapter companion pages.
- Feedback — share corrections and improvement opportunities across all chapters.
About the three-tier Practice format
Each chapter of the book closes with a three-tier Practice block adapted from Cole Nussbaumer Knaflic’s course-adoption pattern in Storytelling with Data: Let’s Practice!: Practice with us (one worked problem with full solution in the book), Practice on your own (open problems with complete answers in Appendix G of the Practice Workbook; this page offers short diagnostic hints), and Practice at work (an open-ended prompt to apply the chapter’s move to a live artifact). This page hosts the middle tier.