Production Defect Logic Tree

Production defect logic tree

This logic tree organizes a manufacturing defect investigation around inputs and process conditions. It asks whether the materials changed, whether the process changed, and whether the measurement system is reporting consistently. The branches avoid a common error: changing machine settings before confirming the supplier lot or the inspection method. Each leaf points to an evidence source such as lot records, maintenance history, change control, or gauge checks. Use the tree with containment actions that protect customers while the investigation proceeds. Expand it with product-specific factors only after the broad causes have been assessed. It gives readers a concise reference they can reuse when discussing the result with colleagues.

Type Arbre de décisionNorme Howard-Raiffa / CART-sklearn / taxonomyMoteur schematex-decisiontreeMis à jour 24/09/2026

La demande

“A logic tree for an increase in production defects: split into Inputs and Process, then check material quality, machine settings, maintenance, change records, operator training, and measurement systems.”

Essayez ensuiteAdd an environmental conditions branchAdd a containment action for the affected lot

Ce que contient ce dessin

Comprenez les décisions qui le sous-tendent.

01Inputs

Check materials before adjusting the process.

02Process

Check documented changes and equipment condition.

03Measurement

Verify the defect signal is real and consistent.

Use for an initial quality investigation after a defect-rate increase.

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FAQ

Questions fréquentes

Why verify measurement?

A changed inspection method can look like a change in defects.

What are inputs?

Materials, components, and other resources entering the process.

Should containment be part of the tree?

Containment can run in parallel while the tree investigates root cause.