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.