The Ishikawa Diagram: A Practitioner’s Guide to Root Cause Analysis
Moving beyond blame and opinion. A field-tested guide to using the fishbone diagram for structured problem-solving in IATF 16949 and…
The Psychology of Quality
404 articles
Anchoring in Quality Management: How the First Number Becomes the Only Number
Cognitive bias distorts targets, tolerances, and risk ratings. Here is how to structurally break the anchor and force evidence-based quality…
Hyperbolic Discounting in Quality Management: Why Organisations Choose Expensive Quick Fixes
Cognitive bias drives organisations to prefer small, immediate costs over larger, deferred gains. Quality systems fail when permanent corrective actions…
Quality and the Theory of Constraints: Why Your Worst Defects Hide Behind the Bottleneck
Applying Goldratt's framework to quality management: why scattered improvement initiatives fail, and how targeting system constraints eliminates chronic defect categories.
The Availability Heuristic: Why Organisations Chase Dramatic Defects and Ignore Systemic Risk
A single line-down event can hijack a quality strategy for months. Here is how to structure systems that force proportional,…
Cognitive Dissonance in Quality Management: When Evidence Meets Belief
Why organisations reject audit findings, rationalise defect data, and rewrite customer complaints instead of fixing the underlying system — and…
Simpson’s Paradox in Quality Management: When Aggregate Data Reverses the Truth
Aggregate dashboards can show improvement while every individual process is degrading. Here is how to detect and prevent this statistical…
Tampering with Stable Processes: How the Gambler’s Fallacy Destroys Quality
Manufacturing teams routinely mistake random variation for meaningful trends, wasting resources and tampering with already-optimised processes. Statistical discipline is the…
Unintended Consequences in Quality Management: How Fixes Create New Failure Modes
Every process intervention changes the system. The most dangerous quality failures are the ones your own solutions quietly created —…
Confirmation Bias in Quality Management: Systemic Failures and Structural Countermeasures
Confirmation bias drives inspectors to miss visible defects and auditors to skip unexamined processes. Here are the structural mechanisms that…