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Landing page audit: Hick's Law, cognitive cost, F-pattern, micro-commitment, CTA design, A/B proposal.
Every element imposes cognitive cost. Finite attention—every word beyond minimum competes with every other. 1. HICK'S LAW AUDIT: Count choices above ...
Technical docs: TypeScript signature, behavior spec, edge cases table, worked example, error scenarios.
Write reference documentation for the described endpoint. Good docs teach the mental model so readers can debug their own mistakes. 1. SIGNATURE with...
Pricing strategy: value metric, decoy-effect tiers, WTP curve, packaging psychology, grandfathering.
Pricing is not cost-plus. Price signals quality, audience, and positioning. A well-designed pricing page answers: 'Is this for someone like me?' 1. V...
Multi-touch attribution: MMM regression, Shapley values, saturation curves, reallocation with expected lift.
Most marketing allocates by historical share or last-click (overvalues final touchpoint, undervalues funnel top). This framework builds defensible all...
Mutation-testing-inspired gap analysis: branch inventory, simulation, 3 critical tests.
A passing test suite tells you nothing about quality. It tells you the code behaves as expected—not that it behaves correctly under all conditions. Th...
Spaced repetition: chunk design, Ebbinghaus intervals, active recall, Leitner error revisits.
Without reinforcement, we forget 50% of new info within 1 hour and 90% within 1 week. Spaced repetition intercepts the curve at optimal intervals. 1....
Analytical framework for Analytics.
Apply structured reasoning to this domain. Decompose, analyze, and produce actionable output.
Unit economics: CAC decomposition (3 types), LTV scenarios (3 tiers), payback, sensitivity analysis.
Build a unit economics model. Unit economics tell you whether each customer contributes profit or loss. Everything else (MRR, total users) is a vanity...
Bayesian A/B analysis: priors, posteriors, win probability, practical significance, expected loss.
Frequentist p-values tell you whether a difference exists, not which variant is better or by how much. Bayesian analysis gives the probability B beats...
Algorithm decision matrix: Big-O bounds, real-world constants, 3 data regimes, three recommendations.
Do not pick the first algorithm that comes to mind. Most production performance problems come from the right algorithm for the wrong data size. This f...