Cases Based Reasoning Development For Cost Estimation

With the highly development of modem science and consumer individuation has been required, respond speed and amount of price have greatly influenced upon whether producers can obtain order for goods. Notifying price not only can activate many productive activities in enterprises, but also can result in a series of action for providing chain. This paper mainly researches on case-based reasoning for rapid cost estimation in order to provide theory and practice instruction for enterprises.This article introduces Case Knowledge Management System that combined ontology and cases-based reasoning to supervise knowledge. In order to help readers comprehend the process and realize cost estimation of new products ultimately, this article puts forward the problem at first.System of cost estimation refers to logical bill of material (BOM). Logical BOM can define the compatibility of parts which is independent of product structure and data structure. Moreover, it allows defining variable entities of product after the respond to inquiring price of clients~ When we establish relative memories, we need use case-based reasoning for deciding the most suitable resource of parts production without accurate matching of properties between existing cases and new part.In practice, logical BOM is lack of expressing the behaviour between two entities. Ontology is useful to resolve this problem. It sets up a normal framework for different user and improves the compatibility of system.Afterwards, we select the arithmetic of similarity evaluation between existing part with new one. That is beneficial to classify each condition and obtain more accurate results. At last, we estimate the cost of electronic transformer combining with these theories above. It tests and analyses the corresponding solution basing on a system that programmed by Visual. Net.Application of case knowledge management system:(1)It constructs relation module of product configuration, resource requirement and cost, resolves the limit of describing by mathematic formats.(2)It builds module of rapid cost estimation and common arithmetic in order to evaluate the similarity based on cases.(3)It defines the limit of authority and set up universal framework for knowledge management.