# Chapter 1 — Practice-on-your-own hints — Companion > Diagnostic hints for the Practice-on-your-own problems from Chapter 1 of The Defensible Decision. Canonical URL: https://www.thedefensibledecision.com/ch/01/practice/ [← Chapter 1 companion](/ch/01/) · [All chapter resources](/ch/) 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](/ch/01/) — Priya’s dashboard walkthrough, further reading, self-check quiz, and the hands-on Copilot-chart activity. - [Priya’s Q3 sales dataset](/datasets/priya-q3-sales/) — the aggregate rollups behind the two dashboards on the Chapter 1 companion page. - [All chapter companion pages](/ch/). - [Feedback](/errata/) — 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.