基于模糊规划的QFD 系统参数确定方法

针对QFD 系统的内在模糊性,运用带有对称三角形模糊系数的模糊规划理论,提出了一 种确定QFD 系统参数的方法. 并通过工程特性目标值的规范化,定义产品开发总成本函数、工 程特性改进成本函数及改进成本系数等概念,建立了一个QFD 规划模型. 仿真结果表明,该模 型能够帮助开发人员在不确定的、模糊条件下有效确定关联函数及自相关函数,优化顾客需求 的满意水平,确定工程特性目标值,使新开发/ 改进的产品顾客满意度赶上或超过目标市场上 的竞争企业,并满足开发预算约束.

QFD system parameters identif ication based on fuzzy program

Aiming to the inherent fuzziness in quality function deployment (QFD) modeling , a new mathematic ap2 proach to identification QFD system parameters is presented using fuzzy optimization theory with symmetric triangular fuzzy number coefficients. By normalizing values of engineering characteristics , introducing new concepts of total de2 velopment cost function , and improving cost function and cost coefficient of engineering characteristic , a program model for QFD is proposed. Simulation results shows that the model can help a design team to determine the relation functions between customer requirements and engineering characteristics , and correlation functions among engineer2 ing characteristics. It can also reconcile tradeoffs among the various customer satisfaction levels and identifies engi2 neering characteristic target values for the new/ improved product that meets a budget constraint and matches or ex2 ceeds the customer satisfaction of all competitors in the target market