Guides
AB Testing Analysis: Guardrails, CUPED, and Decision Memos (2026)
Ab testing analysis turns assignment logs into a guardrail-aware decision memo you can audit, without treating a lone p-value as a ship order on its own.
Read articleBuild experiment decision memos with guardrails and CUPED on the tables you already have.
Ab testing analysis turns assignment logs into a guardrail-aware decision memo you can audit, without treating a lone p-value as a ship order on its own.
Read articleExperiment analysis reads the frozen assignment table first, then writes a guardrail-aware memo a human signs—not a chat that treats a p-value as a ship order.
Read articleCUPED explained is a named pre-period variance cut, not a lift rescue: turn it off when the covariate leaks or the extract has no usable history left.
Read articleGuardrail metrics can veto a primary win: lock refunds, latency, and complaints in the same signed memo before anyone treats lift as permission to ship.
Read articleAb test sample size is a stopping contract: lock the horizon or sequential rule before anyone refreshes a dashboard, or else label the read exploratory.
Read articleAn experiment decision memo is the downloadable artifact: primary, interval, guardrails, CUPED state, attached SQL, and a human ship, hold, or iterate line.
Read articleAnalyze experiment results in SQL by joining assignment to outcomes on the same unit id, then attach that inspectable query to the memo a human signs.
Read articleWhat is ab testing after the design is frozen: assignment first, locked metrics, then a ship, hold, or iterate memo a human signs—not a dashboard peek.
Read articleAn a/b test ends in ship, hold, or iterate: freeze the design, join assignment to outcomes in SQL, then let a named human sign the memo—not a chat win.
Read articleMultivariate testing still needs a frozen design: lock the variants, primary, and named guardrails, then ask the SQL once. More arms are not a peek festival.
Read articleHow to ab test when analysis is the missing object: load the assignment table, bind the metrics, then write one replayable memo a named human still signs.
Read articleAB testing meaning is a frozen design, then SQL: name the primary, one guardrail, and the human who decides. It is not a slider inside a CMS experiment tool.
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