ABSTRACT

Selecting qualified suppliers from a group of candidates is important to procurement. Having several qualified suppliers to choose from can increase production flexibility and bargaining power. This research aims at selecting the substitute suppliers that can produce the parts with the same quality as the current supplier. Most of the existing supplier selection methods focused on univariate or linear profile data, which are insufficient to solve the supplier selection problem under nonlinear profile data. This research develops a step-up approach to select qualified suppliers for substitution under nonlinear profile data where there exists a nonlinear functional relationship between the quality characteristic and the explanatory variable. The proposed approach uses polynomial regression followed by the sequential test procedure to compare profile differences. The simulation results show that the proposed approach can reject the suppliers with different profile functions from the current supplier with satisfying power levels. To illustrate the effectiveness and practicality, the proposed approach is applied to select qualified voice coil motor (VCM) suppliers for a digital camera module manufacturer. Procuring the VCM from the selected suppliers can fulfill a higher demand, while maintaining the operational function and quality of the digital camera module.

摘要

从一组候选中选择合格的供应商对采购很重要。有几个合格的供应商可供选择可以提高生产灵活性和议价能力。本研究旨在选择能够生产与当前供应商相同质量的零件的替代供应商。现有的供应商选择方法大多集中在单变量或线性剖面数据上，不足以解决非线性剖面数据下的供应商选择问题。本研究开发了一种在非线性轮廓数据下选择合格供应商进行替代的逐步方法，其中质量特征和解释变量之间存在非线性函数关系。所提出的方法使用多项式回归，然后是顺序测试程序来比较轮廓差异。仿真结果表明，所提出的方法可以从具有满足功率水平的当前供应商中拒绝具有不同配置文件功能的供应商。为了说明有效性和实用性，所提出的方法被应用于为数码相机模块制造商选择合格的音圈电机 (VCM) 供应商。从选定的供应商处采购 VCM 可以满足更高的需求，同时保持数码相机模块的操作功能和质量。为了说明有效性和实用性，所提出的方法被应用于为数码相机模块制造商选择合格的音圈电机 (VCM) 供应商。从选定的供应商处采购 VCM 可以满足更高的需求，同时保持数码相机模块的操作功能和质量。为了说明有效性和实用性，所提出的方法被应用于为数码相机模块制造商选择合格的音圈电机 (VCM) 供应商。从选定的供应商处采购 VCM 可以满足更高的需求，同时保持数码相机模块的操作功能和质量。