The characteristics of system factors: the elements in the system are interrelated and mutually restricted, the relatively stable contact mode, organizational order and out-of-control state among the elements in the system, the system has certain functions, or the system should have certain purposes.
Accidental reasons are factors that have an impact on product quality, but have an accidental impact on production quality, such as minor changes in raw material composition, minor changes in surrounding environment, minor changes in workers' operation, etc.
Extended data:
The concept of quality management embodies PDCA (p-plan; D-do, execution; C- check, check; Action, processing) cycle:
1, planning stage, see which problems need to be improved, list them item by item, and find out the problems that need to be improved most.
2. In the implementation stage, implement improvement and collect corresponding data.
3. In the inspection stage, evaluate the improvement effect, speak with data, and see whether the actual result is consistent with the original goal.
4. In the treatment stage, if the improvement effect is good, it will be promoted; If the improvement effect is not good, proceed to the next cycle.