Analytical tools that never leave your device.
By field
- Product and growth
- UX and design research
- Security and threat intelligence
- OSINT and investigations
- Competitive and market intelligence
- Operations and supply chain
- Reliability and risk
- Everyday reasoning
Articles
- How do you use prior information in an A/B test?
- How do you turn expert opinions into a prior?
- How do you reuse earlier A/B tests as a prior?
- How much is an experiment worth before you run it?
- Where should you look for lost keys?
- Are five users enough for a usability test?
- How many experts do you need for an expert review?
- If a test is 90% accurate, why is a positive result often wrong?
- Why does customer growth level off when sign-ups stay steady?
- How many ratings before an average means anything?
- How do you tell which explanation the evidence favours?
- What is the German tank problem, and how do you solve it?
- Is the winner of a weighted decision matrix really the best?
- Will it stock out before the restock arrives?
- How do you estimate component life when some units are still running?
- How do you estimate how many people a contractor keeps on a site?
- How long can a stockpile last?
Experiments and evidence
- Bayesian A/B Test Calculator
- Beta-Binomial Calculator
- Diagnostic-Test Calculator
- A/B Test Calculator with Historical Data
- Canary Trap
- Competing Hypotheses
- Call Coach
- Expert Prior Builder
Estimating an unknown quantity
- Serial-Number Estimator
- Capture–Recapture Estimator
- Poisson Rate Calculator
- Posting Time Estimator
- Ceiling Calculator
- Usage Count Estimator
- Rating Estimator
- Customer Value Calculator
- Stockpile Pipeline Estimator
Time, reliability and risk
- Time-to-Event Explorer
- Portfolio Risk Simulator
- Conjunction Calculator
- Bayesian Risk Calculator
- Bayesian Stockout Predictor
- Customer Churn Simulator
Planning and decisions
- Collection Planner
- Sample Size Checker
- Inter-Rater Reliability Audit
- Weighted Decision Matrix
- Bayesian Innovation Options Simulator