DataKnobs

Nine method briefs

Most methods fail at the wrong stage, not on the merits.

A strategy cascade won't tell you why a model breaks in production, and a containment action won't tell you what to build. These nine briefs are grouped by the point in the work where each one earns its keep — deciding, designing, proving, operating — because using a sound method one stage too early or too late is the most common way it disappoints.

Deciding → Designing → Proving → Operating

Start from the symptom

Pick what's actually going wrong and the matching briefs stay lit.

All nine briefs shown, in the order the work tends to happen.

Stage one — Deciding

Choices that constrain everything downstream

Both briefs here are about narrowing: one narrows what the organisation will pursue, the other narrows which method is even admissible given the kind of situation you're in.

Stage two — Designing

Turning a decision into something buildable

Both briefs describe alternation rather than sequence — widening then narrowing, discovering while delivering — and both fail the same way, by collapsing back into phases.

Stage three — Proving

Evidence that survives contact with a stakeholder

These three share one rule: the standard for judging a result has to be fixed before the result exists, and the number you report has to be attached to something that would change if it moved.

Stage four — Operating

Keeping it working, and fixing it properly when it doesn't

The last stage is where the cost of skipping an earlier one finally shows up: an unreproducible model, or a defect that was contained rather than corrected and comes back somewhere adjacent.