Abstract: The paper states how to determine customization level after carrying out the MC strategy and possessing a definite MC ability.Firstly,it analyzes the customized demand,stndies the relationship between the enterprise income and customized level and establishs a model and an algorithm of product and arrangement;Secondly,it discusses relationship of customization cost and customization level,the paper suggests a common way to determine a best customization level;At last,it sets an example to explain and analyze some mode and method related to the context.

Key words: optimization of customized level, customer satisfaction, mass customization