Drill · Diagnose the Tree
Match each symptom to what it means or what to do. Check when done.
Tool · Equation / Global-Variable Evaluator
Rules as numbers
Encode a design rule once and let dimensions follow. Example rules from the book: wall = OD ÷ 10 and boss height = wall × 3 + 5. Enter an OD to see the driven values.
Result appears here.
A driven dimension shows a red Σ and can no longer be edited directly — the equation owns it.
Encode rules the design states, not coincidences.