Knowledge

Review a Supplier Change Notice After Part Appr...

A part approval is a controlled baseline, not a permanent assumption that every later shipment is made the same way. A supplier may change material, tooling, heat treatment, manufacturing location,...

A Measurement Near the Tolerance Limit Is Not a...

A measured value printed inside a drawing tolerance is still a measurement result, not a complete conformity decision. Near a specification boundary, the associated uncertainty and the pre-agreed decision rule...

What to Put in a Supplier Quality Agreement for...

A supplier quality agreement is useful when it turns recurring expectations into named responsibilities and traceable records. It should help a buyer and supplier answer who controls a requirement, what...

Ozone Aging and Heat Aging Answer Different Rub...

An environmental-resistance report can look reassuring while leaving the buyer's actual question unanswered. “No cracks after ozone exposure” describes one observed response under one atmosphere and strain condition. A change...

Check a Calibration Certificate and the Laborat...

A calibration sticker can be current while the supporting certificate is for a different serial number, a narrower range or a different type of measurement. An accreditation logo can also...

Write Shipping Marks That Match the Parts Packi...

A parts crate is easy to identify only when its shipping mark and its packing-list line describe the same physical package. The package number, purchase-order reference, contents, quantity, weights, dimensions...