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DATEOFMANUFACTUREdateofmanufacture production date, ex-factory date DATEOFEXPIRYdateofexpiry expiration date.

DOE is a quality tool in 6SIGMA management. 6SIGMA management is a goal pursued by many famous large companies in the world. Through the comprehensive improvement of quality management, the management level of the company can reach a very high level, such as a The enterprise has reached the 6SIGMA level, and the product failure rate is only 3.4 parts per million. This is the goal that important enterprises such as civil aviation and nuclear power and all large enterprises that want to become world-class continue to pursue. The average domestic enterprise is only around the 2 or 3 SIGMA level.