Description: The description of expert system (ES) of the analysis of customer requirements at fuzzy information is given. The structure of ES of the analysis of customer requirements in a direction of search developed pattern of sophisticated technical system (SТS), which is similar to the new project product is developed. The structure of the knowledge base is constructed. The information given by such ES will be useful as to developer, for substantiation of a choice of STS from a number of developed patterns, as to customer, for check of conformity of project product to initial requirements.
Keywords: multiproject, sophisticated technical system, expert system, knowledge base, fuzzy logic, linguistic value of truth, membership function