Production control
The production control is often referred to as "manufacturing inspection". From a purely technical point of view, the term test only contains a statement about good or reject . But colloquially and also in a wide range of technical areas, “measurements” are also assigned to “testing”.
In the production control, the quality of the production is evaluated and documented. The aim is to evaluate the quality as well as the documentation .
Explanation
The production control has the following goals:
- Improvement of product quality: process optimization
- Avoidance of danger : producer liability
- Reduction of rejects (ie defective products): cost savings
- Delivery of statistical data for evaluation and analysis according to standards and customer requirements
Production control is often not subordinated to production planning , but to quality management so that there is no influence. It used to be carried out by the worker or his superiors. With increasing industrialization, norms and laws were developed.
The tasks of production control are defined by
- Quality management
- quality control
- Customer requirements
- Laws - e.g. B. Producer Liability
- Quality management standards , e.g. B. DIN ISO 9000: 2000, QS 9000, TS 16949, VDA 6.1
Occasionally, production control also serves to regulate production by providing production control with feedback. See: regulation (nature and technology) .
General procedure in industrial production control
First, a plan, usually called a “test plan”, is drawn up (the correct name would be: control plan). An FMEA is often carried out in order to be able to evaluate the influencing variables. The following are specified:
- Control features (usually referred to as "test features")
- Measurands
- Measuring equipment
- Test equipment
- Lot sizes
- Measurement and test intervals
Production control works according to the criteria specified there and documents the results. Test and measurement results as well as controlled parts are often archived over a period of many years to preserve evidence. The documentation is usually evaluated by quality management.
Basic control procedures
- Check
- Recognition of attributive features such as “good” or “reject”. Note: See "Taylor test principle". See also teaching (technology) .
- measure up
- Evaluation of geometric, electrical, physical, chemical or other measured variables.