The nine sessions 🔍 · one review instrument, assembled across all of them
Each session adds one layer's lens and measures what that lens contributed on its own. Two of the nine add nothing at all, which is the most useful finding in the course.
The canon and the instrument
Where heuristics come from: 249 observed problems reduced to 10, severity on three factors, and the measured moment a usability lens finds 5 of Tideline's 20 defects.
🎯 Session 2 · foundationsThe decision it serves
GQM as a derivation and HEART with its Goals-Signals-Metrics step - plus the four frameworks everyone cites that never published a principle list at all.
📜 Session 3 · hands-onData as a product, and its contract
FAIR's four principles and all fifteen sub-points, Dehghani's eight characteristics, DAMA's six dimensions - run against a contract that really validates as you type.
🏗️ Session 4 · systemsThe platform underneath
Six Well-Architected pillars, the analytics lens, twelve factors applied to a pipeline, and the PACELC question that governs analytics far more than CAP does.
⏱️ Session 5 · systemsOperating the promise
All eighteen DataOps principles, the four golden signals translated to a pipeline, and a freshness SLO with an error budget - so lateness becomes a fact, not an argument.
📐 Session 6 · hands-onTruth on the surface
Graphical integrity with the lie factor computed live at 6.5 to 1, Few's thirteen pitfalls in full, and the standard that adds nothing once two others are on.
🎛️ Session 7 · hands-onThe interaction
Five interaction sets worked hard against filters, long queries and error states - including the nineteen principles almost nobody applies to analytics.
🤖 Session 8 · advancedWhen the product is intelligent
Microsoft's eighteen human-AI guidelines across their four phases, PAIR's six chapters, and Apple's four dichotomies as the triage that says which guidelines are urgent.
🔎 Session 9 · capstoneThe review
The finished instrument over the whole product: twenty of twenty, severity-ordered, then the exhaustive pass that keeps the catches and destroys the precision.
Your passport 🎫
Clear all three quiz questions in a session and it gets stamped. Stamps live in this browser only.
What is real here 🧾
A course about reviewing other people's claims has to be precise about its own.
| Claim | Status |
|---|---|
| The twenty defects in Tideline | Real properties of a screen rendered into the page. Every check queries that DOM - there is no answer key. The truncated axis lie factor of 6.5 to 1 is computed from the drawn bar heights, the 13 distinct fills from resolved computed colours, the 64px below the fold from real overflow |
| The lens ladder: 5, 10, 11, 11, 14, 14, 17, 19, 20 | Measured in a browser, one lens at a time, counting only findings no earlier lens produced. IBCS and PAIR genuinely add zero on this product |
| The exhaustive-pass cost | Twelve additional findings, each one a true statement about the screen and none of them a defect. Precision 100 to 63 percent is arithmetic on those counts |
| The review-time figures, 66 and 144 minutes | Modelled, not measured - a flat per-lens and per-finding cost estimate. Labelled as a model on the widget itself |
| The contract validator | Really parses what you type against 22 checks drawn from FAIR, DAMA and the data-product attributes. The sample scores 7 of 22, and five added lines take it to 14 |
| Norman, Tufte, Gestalt, Kimball and Inmon | Taught by concept and consequence, never as numbered lists - none of those authors published one, which is why every secondary source gives a different count |
| Dehghani's 8, DAMA's 6, ISO 9241-110's 7, the AWS analytics lens | Real sets whose primary source is paywalled or members-only, so the wording travels through close secondary sources. Flagged as such on the page that teaches each |
| The lakehouse, decision intelligence, North Star, the AI hierarchy of needs | Widely cited as numbered principle sets. Their primary sources enumerate no such list, so this course gives no counts for them and says why |
The knowledge map 🧠
The whole course at a glance - hover a session to spotlight its concepts, click any node to jump in.