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.
Install
npx skills add RBraga01/Quality-Engineering-Skills --skill is-is-not-scopingnpx skills add RBraga01/Quality-Engineering-Skills --skill is-is-not-scoping -a claude-code -gnpx skills add RBraga01/Quality-Engineering-Skills --skill is-is-not-scoping -a codex -ggemini skills install https://github.com/RBraga01/Quality-Engineering-Skills.git --path skills/problem-solving/is-is-not-scopinggh skill install RBraga01/Quality-Engineering-Skills is-is-not-scopinggit clone --depth 1 https://github.com/RBraga01/Quality-Engineering-Skills /tmp/RBraga01__Quality-Engineering-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/RBraga01__Quality-Engineering-Skills/skills/problem-solving/is-is-not-scoping ~/.claude/skills/is-is-not-scoping # Claude Code
cp -R /tmp/RBraga01__Quality-Engineering-Skills/skills/problem-solving/is-is-not-scoping ~/.agents/skills/is-is-not-scoping # Codex, Cursor, Gemini CLI, Copilot, OpenCode