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is-is-not-scoping

Problem scoping with Is/Is-Not for 8D D2 problem description, CAPA investigation, or hypothesis elimination. Defines the precise boundary by contrasting what IS observed vs what IS NOT — eliminating hypotheses that don't fit the pattern. A Ford-originated automotive technique used in every structured quality investigation.

plugins/RBraga01/Quality-Engineering-Skills/skills/problem-solving/is-is-not-scoping/SKILL.md

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# Is/Is-Not Problem Scoping

## When to use

Use Is/Is-Not at the start of any quality investigation to precisely define what the problem IS and what it IS NOT. This scoping prevents wasted investigation effort and immediately eliminates hypotheses that cannot explain the observed IS/IS-NOT pattern.

Most effective in 8D D2 (problem description), CAPA scoping, and any situation where the defect is intermittent, batch-specific, or location-specific.

## Critical rule — facts only

**The IS column contains only documented, measured facts.** Hypotheses, assumptions, and opinions belong in the hypothesis list, not in the matrix. If a cell contains an assumption rather than a fact, the entire analysis is compromised.

If data is not yet available: mark the cell as "Unknown — to be investigated" and identify what investigation is needed before proceeding.