Study On The Method Of Individual Character Product Requirement Description

It is an individual character product that makes to order and designs product completely based on client requirement, it satisfies the client requirement to function, construction, character, shape etc. of the product, and pierces through the product whole life cycle. How to make use of the current product design methods into the interactive product design which centered-on clients and based on Internet network environment, the research of client requirement describe is an important issue.Cored-on client requirement, this paper researches on client requirement express, the method of requirement description, product information model based on requirement, requirement knowledge processing, evaluation system of product based on requirement, etc. The main points and contributions are as follows:1. The development frame of individual character product based on virtual prototyping is presented, through using the features information construction tree and the rule constraint of requirement, the client requirement express is ensured, and the model of client requirement express is researched.2. The semantics description of individual character product requirement and the compatibility verification issue of client requirement express are researched. Through analyzing the formal description and the semantics structure of client requirement, making a premise of individual character product features information grammar, the client requirement description language which is apt to comprehension by computer is constructed. Through researching nodes matrix condition, traversing nodes of tree and validating requirement compatibility method by the reduction based on grammar, the rationality and validity of client requirement are ensured.3. The semantics features modeling technology of individual character product which is fit for client requirement express is presented. Through using multi-Agent modeling method and low-layer element of the product cooperation, the optimum design purpose of product is formed. Through product mapping product information construction based on XML, establishing the product information model based on network environment, organizing and managing effectually the product information model, the validity and reliability of information that client acquire from Internet are ensured.4. The mode of client requirement knowledge processing is presented to lead or optimize client requirement, and construct reasonable design scheme of product. Through setting up the product requirement knowledge processing system construction, that makesknowledge processing have definite objects and interactive relation of objects. The representation of client requirement knowledge based on frame- rule and its inference process are presented, the product knowledge index and retrieve are analyzed. The logic construction and function of knowledge discovery Agent is described, the mode of client requirement knowledge associated rule digging is analyzed, so it can acquire a strong or weak connection degree within nodes. Through reasoning Bayesian network model based on the features information construction tree of client requirement, the client requirement concentration is acquired.5. The evaluation system of individual character product based on requirement and cost estimation method of individual character product are researched. Through constructing evaluation system and evaluation indexes based on individuation degree, the product's individualize degree is quantitative evaluated from the conceptual design stage of individual character product. Starting with the cost structure of the product whole life cycle, the method of product cost estimation is discussed, the model of case based reasoning is established, case library organization and description, similar case retrieval and case adaptation are analyzed. So client can acquire effectually product cost estimation while product requirement is expressing.