What is sampling?
In engineering, sampling is the testing and approval of sample parts of a new or revised product or manufacturing process. It serves to ensure the dimensional accuracy, function, material properties and processability of a component, including rubber, plastic or composite parts.
Objectives of the sampling
Sampling is intended to ensure that the part produced meets the technical specifications. Typical test scopes are
- Dimensional accuracy
- Surface quality
- Material testing
- Functional test in the component assembly or application test
- Adhesion for composite parts (e.g. Rubber-metal, Multi-component injection moulding)
Sampling is often part of a quality-assured approval process, e.g. as part of PPAP (automotive), VDA or internal test plans.
Types of sampling
- Initial sample inspection (EMP/EMPB) at the first start of production
- Follow-up sampling, e.g. for requalification after a longer production interruption