Inspection and statistical methods ensure conformity.
QC ensures products meet specs through inspection, sampling (AQL), testing and process control. Quality assurance builds quality into processes (ISO 9001). Tools: control plans, first-article inspection, gauge studies, traceability and corrective actions (8D, 5 Whys).
Incoming inspection samples 5% of a supplier batch.
Quality control detects defects before they reach customers, so it protects reputation, safety and cost.
Inspection and statistical methods ensure conformity.
Quality control detects defects before they reach customers, so it protects reputation, safety and cost.
A full inspection of the first part from a new process or tool, to confirm that the process can make parts within specification.
Inspection checks dimensions and features against the drawing, while testing checks function and performance under defined conditions.
Typical applications include inspecting the first article of a production run against the drawing, checking the critical dimensions of every tenth part in a batch and running a final functional test on a finished pump.
Study "Design for manufacturing" first (topic 32 of 102 in Manufacturing, Robotics & Systems). It covers the groundwork this topic builds on.
Inspection vs prevention. Sampling plans. Cost of quality.
Incoming inspection samples 5% of a supplier batch.
The next topic is "Statistical process control", which builds directly on this one.
It is classed as Beginner in Manufacturing, Robotics & Systems (topic 33 of 102). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.
Want to practise? Open the interactive course for quick checks, quizzes, simulations and progress tracking.