Product Life Cycle To Identify The Model

This thesis redefines phases of Product Life Cycle(PLC) on the base of new indicating system for identification which is related with environment surrounding of enterprises and is influenced by industry .A new identifying model of PLC is set and it is applied in a case.Firstly the background of PLC theory are reviewed as the introduction of PLC theory and the outline of a new one basing on the old fuzzy identifying model is given with the analysis of present study on identification theory of PLC.Secondly in the main part of this thesis the process of setting a new model is described. The new definition of PLC phases are proposed with considering two aspects-the measurement of environment and the influence of industry, mixed with the old indicating system.And the fuzzy mathematics theory is used as a tool of it.Then the new fuzzy identifying model is built up.Finally the new model is applied and examined in a case and the result from the application is analyzed The conclusion is drawn that the new one is superior to the old .The new model can be seen as further development of PLC theory and strong support for enterprise decision-making due to its easy application.