# The Defensible Decision

> Companion site to The Defensible Decision: A Guide to AI-Assisted Business Analytics, with chapter resources, teaching datasets, analytical prompts, interactive charts, and living errata.

This directory links to clean Markdown representations of every public, indexable companion-site page.

## Public pages

- [Appendix E — BRD Field Guide Resources | The Defensible Decision](https://www.thedefensibledecision.com/appendix-e/index.md): Resources for Appendix E of The Defensible Decision: the eight-section BRD template, five completed exemplars, four starter BRDs, and three transcript-driven elicitation prompts.
- [Chapter 1 Companion — Why Principles First, AI Later | The Defensible Decision](https://www.thedefensibledecision.com/ch/01/index.md): Companion page for Chapter 1 of The Defensible Decision. Curated further reading on automation bias and perceptual foundations of visualization, a five-question self-check quiz on the plausible-looking-output trap, and a hands-on activity that reads a Copilot chart against the Part I principles.
- [Chapter 1 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/01/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 1 of The Defensible Decision.
- [Chapter 2 Companion — Context Before Any Chart | The Defensible Decision](https://www.thedefensibledecision.com/ch/02/index.md): Companion page for Chapter 2 of The Defensible Decision. Curated further reading beyond Appendix C, a five-question self-check quiz, a hands-on activity against the CloudRevenue starter BRD, and pointers to related site resources.
- [Chapter 2 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/02/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 2 of The Defensible Decision.
- [Chapter 3 Companion — Story: From Data to Argument | The Defensible Decision](https://www.thedefensibledecision.com/ch/03/index.md): Companion page for Chapter 3 of The Defensible Decision. Curated further reading on narrative craft in business communication, a five-question self-check quiz on the Big Idea and the three-act arc, and a hands-on activity that walks the story discipline against the M365Marketing dataset.
- [Chapter 3 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/03/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 3 of The Defensible Decision.
- [Chapter 4 Companion — Chart Selection: Matching the Question to the Form | The Defensible Decision](https://www.thedefensibledecision.com/ch/04/index.md): Companion page for Chapter 4 of The Defensible Decision. Curated further reading on chart-family taxonomies, a five-question self-check quiz on the five families and their default failure modes, and a hands-on activity that walks the family-before-type discipline against the CloudRevenue dataset.
- [Chapter 4 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/04/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 4 of The Defensible Decision.
- [Chapter 5 Companion — Focus and Decluttering: The Discipline of Removal | The Defensible Decision](https://www.thedefensibledecision.com/ch/05/index.md): Companion page for Chapter 5 of The Defensible Decision. Curated further reading on data-ink ratio and visual attention, a five-question self-check quiz on the removal discipline, and a hands-on activity that runs remove-until-it-breaks against a Copilot dashboard.
- [Chapter 5 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/05/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 5 of The Defensible Decision.
- [Chapter 6 Companion — Color, Type, and Accessibility: Visual Rhetoric | The Defensible Decision](https://www.thedefensibledecision.com/ch/06/index.md): Companion page for Chapter 6 of The Defensible Decision. Curated further reading on perceptual color science, WCAG contrast, and typography for data displays, a five-question self-check quiz on palettes and typographic hierarchy, and a hands-on accessibility audit against a Copilot dashboard.
- [Chapter 6 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/06/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 6 of The Defensible Decision.
- [Chapter 7 Companion — From Hand-Built to AI-Directed | The Defensible Decision](https://www.thedefensibledecision.com/ch/07/index.md): Companion page for Chapter 7 of The Defensible Decision. Curated further reading on human-AI collaboration and role transitions, a five-question self-check quiz on the author-to-director contract and the readiness gate, and a hands-on rubric-score-yourself activity that gates Part II entry.
- [Chapter 7 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/07/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 7 of The Defensible Decision.
- [Chapter 8 Companion — Dialog Engineering and the CSAR Loop | The Defensible Decision](https://www.thedefensibledecision.com/ch/08/index.md): Companion page for Chapter 8 of The Defensible Decision. Curated further reading on prompt engineering and iterative dialog, a five-question self-check quiz on the four CSAR phases, and a hands-on activity that walks one full loop against a CloudRevenue prompt.
- [Chapter 8 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/08/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 8 of The Defensible Decision.
- [Chapter 9 Companion — Directing Copilot Report Generation | The Defensible Decision](https://www.thedefensibledecision.com/ch/09/index.md): Companion page for Chapter 9 of The Defensible Decision. Curated further reading on semantic-model design and Copilot for Power BI, a five-question self-check quiz on the three report-generation failure modes, and a hands-on activity that reconciles a Copilot report against source of truth.
- [Chapter 9 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/09/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 9 of The Defensible Decision.
- [Chapter 10 Companion — AI Visuals: Key Influencers, Anomaly, Decomposition Tree, Smart Narrative | The Defensible Decision](https://www.thedefensibledecision.com/ch/10/index.md): Companion page for Chapter 10 of The Defensible Decision. Curated further reading on the four AI-labeled Power BI visuals, a five-question self-check quiz on the per-visual verification moves, and a hands-on activity that runs the confound check, business-calendar walk, filter-clear re-walk, and BRD-alignment check.
- [Chapter 10 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/10/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 10 of The Defensible Decision.
- [Chapter 11 Companion — Prep for AI and Asking Data Questions | The Defensible Decision](https://www.thedefensibledecision.com/ch/11/index.md): Companion page for Chapter 11 of The Defensible Decision. Curated further reading on Prep for AI (AI data schemas, verified answers, AI instructions), a five-question self-check quiz on the three-component upstream investment, and a hands-on activity that configures Prep for AI on a sandbox model.
- [Chapter 11 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/11/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 11 of The Defensible Decision.
- [Chapter 12 Companion — Dashboard Design: Composition, Hierarchy, and the 5-Visual Rule | The Defensible Decision](https://www.thedefensibledecision.com/ch/12/index.md): Companion page for Chapter 12 of The Defensible Decision. Curated further reading on dashboard composition, a five-question self-check quiz on the 5-Visual Rule and hierarchy order, and a hands-on activity that runs the blurred-thumbnail and mobile checks against a Copilot dashboard.
- [Chapter 12 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/12/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 12 of The Defensible Decision.
- [Chapter 13 Companion — When AI Misleads: Failure Modes and How to Catch Them | The Defensible Decision](https://www.thedefensibledecision.com/ch/13/index.md): Companion page for Chapter 13 of The Defensible Decision. Curated further reading on cognitive-bias mechanisms and automation over-reliance, a five-question self-check quiz on vibe charting and the five diagnostics, and a hands-on activity that scores a shipped artifact against the diagnostics.
- [Chapter 13 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/13/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 13 of The Defensible Decision.
- [Chapter 14 Companion — Responsible AI in Business Analytics | The Defensible Decision](https://www.thedefensibledecision.com/ch/14/index.md): Companion page for Chapter 14 of The Defensible Decision. Curated further reading on responsible AI standards and fairness in analytics, a five-question self-check quiz on the four moves (provenance, fairness, decision boundaries, disclosure), and a hands-on activity that runs the four-moves pass on an artifact you own.
- [Chapter 14 — Practice-on-your-own hints — Companion](https://www.thedefensibledecision.com/ch/14/practice/index.md): Diagnostic hints for the Practice-on-your-own problems from Chapter 14 of The Defensible Decision.
- [Chapter Resources — The Defensible Decision](https://www.thedefensibledecision.com/ch/index.md): One companion page per chapter of The Defensible Decision. Each page carries curated further reading beyond Appendix C, a five-question self-check quiz, a hands-on activity, related site resources, and the chapter's operative citations.
- [Aisha's AIRS Cohorts — Chapter 6 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/aisha-airs-cohorts/index.md): Synthetic AIRS Longitudinal cohort scenario used to build Aisha's readiness-gain chart in Chapter 6 of The Defensible Decision. Six cohorts of an AI-and-analytics course, one semester apart across three years, with start-of-course and end-of-course AIRS scores.
- [Anand's Four-Moves Capstone — Chapter 14 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/anand-headcount-fourmoves/index.md): The Copilot-first-output through four responsible-AI moves trace behind Anand’s headcount-allocation dashboard review in Chapter 14 of The Defensible Decision. Provenance, Fairness, Decision-Boundary, Disclosure — each move’s actions, purpose, and surfaced issue locked in one dataset.
- [Asha's Escalation-Driver Confound Check — Chapter 10 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/asha-escalation-drivers/index.md): The Monday-morning Key Influencers verification trace behind Asha’s 90-minute escalation review in Chapter 10 of The Defensible Decision. Three drivers on the AI output; three verification moves; three different verdicts.
- [CloudRevenue — Teaching Dataset | The Defensible Decision](https://www.thedefensibledecision.com/datasets/cloudrevenue/index.md): Synthetic cloud subscription revenue across 8 product families × 247 tenants × 36 months. Designed to support practice for the chart-selection, dashboard-design, and AI-direction chapters of The Defensible Decision.
- [Diego's Campaign-Attribution Report — Chapter 9 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/diego-campaign-attribution/index.md): The cold-prompt vs CSAR-directed trace behind Diego’s Q3 campaign-attribution report in Chapter 9 of The Defensible Decision. Three failure modes the cold pass ships silently; three CSAR moves catch them.
- [EnterpriseGovernance — Teaching Dataset | The Defensible Decision](https://www.thedefensibledecision.com/datasets/enterprisegovernance/index.md): Synthetic enterprise data-governance snapshot. 12 business units × 8 governance capabilities × 24 months of operational-signal trajectory + an annual self-assessment that disagrees with the signal.
- [Teaching Datasets | The Defensible Decision](https://www.thedefensibledecision.com/datasets/index.md): Teaching datasets that accompany The Defensible Decision: four cross-chapter datasets, fourteen chapter worked examples, and two practice datasets. Wholly synthetic; every file is documented and downloadable.
- [Kenji's Ticket-Tier Divergence — Chapter 4 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/kenji-ticket-tiers/index.md): Twelve months of tier-2 support ticket volume and mean resolution time behind Kenji’s Wednesday-mid-morning chart-family rebuild in Chapter 4 of The Defensible Decision. Nine months pre-automation, three months post-automation, one Big Idea about divergence.
- [Lina's Channel ROMI — Chapter 3 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/lina-channel-romi/index.md): The five-channel marketing-attribution dataset behind Lina's clustered-column failure vs the single-encoding Big Idea rebuild in Chapter 3 of The Defensible Decision. Five channels, four metrics each, one audience question — and one chart shape that answers it in three seconds.
- [M365Marketing — Teaching Dataset | The Defensible Decision](https://www.thedefensibledecision.com/datasets/m365marketing/index.md): Synthetic multi-channel marketing campaign performance across 24 campaigns × 5 channels × 78 weeks. Designed to support practice for the dashboard-design, AI-data-prep, and anomaly-detection chapters of The Defensible Decision.
- [Marcus's Compromise Dashboard — Chapter 2 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/marcus-compromise/index.md): The two-audience compromise-dashboard scenario from Chapter 2 of The Defensible Decision. Six visuals on one page that fail both audiences, alongside the two-BRD alternative: one small chart per audience, each answering its audience's specific decision question.
- [Mei's Revenue-Cycle Prep for AI — Chapter 11 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/mei-revenue-cycle/index.md): The five-CFO-question before-and-after trace behind Mei’s Prep-for-AI pass on the revenue-cycle model in Chapter 11 of The Defensible Decision. Two work cleanly; three break in three different ways; the Prep pass fixes two and correctly refuses the fourth.
- [Nadia's Q3 Revenue by Region — Chapter 7 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/nadia-q3-region/index.md): The regional-revenue dataset behind Nadia's hand-built vs Copilot-first-draft comparison in Chapter 7 of The Defensible Decision. One quarter, four regions, $28.4M on plan — and one region hiding a material miss.
- [Ch 5 Practice — Q3 Revenue vs Plan | The Defensible Decision](https://www.thedefensibledecision.com/datasets/practice-ch5-revenue-plan/index.md): The four-region revenue dataset behind Chapter 5's Practice with us problem in The Defensible Decision. One quarter that reads as fine, one region that missed by 15%, and a chart with every default decoration switched on so you cannot see the second thing for the first.
- [Ch 6 Practice — Pipeline Coverage by Region | The Defensible Decision](https://www.thedefensibledecision.com/datasets/practice-ch6-pipeline-coverage/index.md): The six-region pipeline dataset behind Chapter 6's Practice with us problem in The Defensible Decision. Six series, a five-colour palette, and four presentation failures stacked on one chart — each of which, on its own, would be survivable.
- [Priya's Q3 Sales — Chapter 1 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/priya-q3-sales/index.md): Synthetic apparel-retailer Q3 sales scenario used to build Priya's dashboard in Chapter 1 of The Defensible Decision. Aggregate rollups only; the figures in the book only visualise aggregates and this dataset is scoped to match.
- [Rohan's Services Dashboard — Chapter 12 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/rohan-services-dashboard/index.md): Synthetic regional-services-company Q3 scenario used to build Rohan's executive dashboard in Chapter 12 of The Defensible Decision. A single quarter, three months, four service lines, four regions — sized to what an executive Monday-morning dashboard actually shows.
- [Sara's EMEA CSAR Loop — Chapter 8 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/sara-emea-csar/index.md): The CSAR-loop trace behind Sara’s Tuesday-morning «one-page summary of why Q3 missed plan in EMEA» request in Chapter 8 of The Defensible Decision. Two attempts: cold first, then Crystallize-Scope-Assemble-Refine.
- [SupportInsights — Teaching Dataset | The Defensible Decision](https://www.thedefensibledecision.com/datasets/supportinsights/index.md): Synthetic customer support tickets at full ticket grain. 47 agents across 3 pods, 10 categories, 60 knowledge-base articles, ~25,400 tickets over 12 months.
- [Tomás's Governance Dashboard — Chapter 5 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/tomas-governance/index.md): The fifteen-visual dense governance dashboard Tomás built on Friday afternoon and the seven-visual rebuild he shipped to the audit committee, from Chapter 5 of The Defensible Decision. Every visual’s keep/remove verdict and its reason live in this dataset.
- [Yuki's Session — Chapter 13 Worked Example | The Defensible Decision](https://www.thedefensibledecision.com/datasets/yuki-session/index.md): The reroll timeline and diagnostic scorecard behind Yuki’s 1:47 a.m. dashboard-polish session in Chapter 13 of The Defensible Decision. Four iterations, five diagnostics, one shipped dashboard that runs below the WCAG contrast threshold. The scenario is about the CYCLE and the SCORECARD, not reconciled numbers.
- [Death by Pie Chart — The Defensible Decision](https://www.thedefensibledecision.com/death-by-pie-chart/index.md): A featured arcade title-slide animation: a hungry hero chomping pie charts through a cubicle-corridor maze, extending the book's running argument that pie charts hide comparison.
- [Death by Pie Chart](https://www.thedefensibledecision.com/death-by-pie-chart/slide.md): Visual slide illustrating the 'Death by Pie Chart' example from The Defensible Decision — the cautionary case against pie charts in analytics.
- [Feedback — The Defensible Decision](https://www.thedefensibledecision.com/errata/index.md): Share feedback on The Defensible Decision, its Practice Workbook, and companion site.
- [Complete Chart Gallery | The Defensible Decision](https://www.thedefensibledecision.com/gallery/index.md): Didactic chart gallery for The Defensible Decision — how to choose, read, and challenge business visuals, grounded in Knaflic, Few, Kirk, and Cotgreave.
- [Getting Started: Accounts and Licensing — The Defensible Decision](https://www.thedefensibledecision.com/getting-started/index.md): Which Microsoft account to use for Power BI and Microsoft Fabric with Copilot before working through this book's Part I and Part II exercises.
- [The Defensible Decision — Companion Site](https://www.thedefensibledecision.com/index.md): Companion site to the book The Defensible Decision: A Guide to AI-Assisted Business Analytics. Chart gallery, per-chapter resources, feedback, and living references that complement the print book.
- [Power BI, Fabric, and Copilot — The Defensible Decision](https://www.thedefensibledecision.com/power-bi/index.md): A practical Power BI, Microsoft Fabric, and Copilot section for readers of The Defensible Decision: setup guidance, a first-project video path, and curated platform resources.
- [Power BI Video Guide: From First Report to Defensible Decision — The Defensible Decision](https://www.thedefensibledecision.com/power-bi/video-guide/index.md): A practical Power BI video guide for readers of The Defensible Decision: choose a course, build a small report, and use the book's question-first discipline to judge the result.
- [Practice Hints — The Defensible Decision](https://www.thedefensibledecision.com/practice/index.md): Diagnostic hints for every Practice-on-your-own problem in The Defensible Decision Practice Workbook, organized by chapter.
- [Prompt Library | The Defensible Decision](https://www.thedefensibledecision.com/prompts/index.md): Living prompt library for The Defensible Decision. Eleven canonical prompts from Appendix B, organized by intent, with per-prompt verification dates.
- [Online Resources — The Defensible Decision](https://www.thedefensibledecision.com/resources/index.md): Living index of tool-agnostic data-visualization resources that complement the book The Defensible Decision. Power BI, Fabric, and Copilot resources live in the dedicated platform section.
- [Starbucks AI-Driven BI Capstone](https://www.thedefensibledecision.com/starbucks/index.md): An evidence-gated MBA capstone for framing, analyzing, and defending a Starbucks business intelligence recommendation with AI assistance.
- [Statistics Claim Check — The Defensible Decision](https://www.thedefensibledecision.com/statistics/index.md): Companion to Appendix F of The Defensible Decision. Check averages, group differences, associations, and AI-generated drivers before communicating or acting.

## Optional

- [Complete companion-site text](https://www.thedefensibledecision.com/llms-full.txt): The complete public text in one file.