Practical insights
- 1000published
- 25in review
- 8topic families
Results
- Deduplicate late-arriving corrections by business key and load time, explicitly
A flight-day feed sometimes sends the same row twice, the second with an updated revenue figure.
mediumpractitioner heuristic - Minimise personal data in features and give training snapshots a retention period
A churn model's training set copies full customer records, including fields the model never uses, and snapshots are kept indefinitely.
mediumdocumented fact - Report a null result with its interval and detectable effect, not as 'no effect'
A test of a new recommendation model shows no statistically significant revenue change, and the summary says 'the model does not work'.
mediumdocumented fact - Pair any model-driven KPI target with guardrail metrics to resist Goodhart effects
A call-centre routing model is rewarded on average handle time, and handle time falls while repeat calls rise.
mediumpractitioner heuristic - Limit and explain forecast churn between model versions
A new forecasting model version changes next month's plan by 15% for some routes, though inputs barely changed.
mediumpractitioner heuristic - Count rows that are unique on indirect identifiers before releasing a table
An extract with names and ids removed, but birth date, postcode and gender intact, is to be shared with a partner for research (hypothetical).
mediumdocumented fact - Treat hashed customer ids as pseudonymous personal data and keep the key apart
Emails in a training table are replaced by plain hashes, and the table is called anonymous and sent to a vendor (hypothetical).
mediumdocumented fact - List who bears each error type before setting the threshold
A claims-flagging threshold is set from investigator hours alone, while flagged customers wait weeks for payment (hypothetical).
mediumpractitioner heuristic - Use quantile dotplots, not only interval bars, when non-specialists decide under uncertainty
A gate-staffing planner receives delay forecasts as 80 percent interval bands and acts on the midpoint anyway (hypothetical).
mediumempirical finding - Gate project ranking on decision owner and label readiness before scoring value
A backlog of fourteen ideas is ranked by sponsor seniority and novelty (hypothetical).
mediumpractitioner heuristic - Keep a small permanent randomised control share to measure what the model earns
Six months after launch, finance asks what the retention model earned, and the only evidence is before-and-after revenue (hypothetical).
mediumpractitioner heuristic