The following are the rules of quality control:
I. The dominant raw material (s) are selected for priority of attention
2. The selected raw materials are tested in relation to their contribution to product quality.
3. The raw materials tested are released from the stores only after the test results
have been properly recorded.
4. Process control must relate the processing results to the raw materials test.
5 Define the critical points in the process and concentrate on these.
6. Finished product inspection should be reduced to the minimum level compatible with
the confidence justified by the raw materials and process control.
7. Quality control is effective in proportion to its degree of integration into the overall
organisation of the factory.