Optimal Binning Strategies under Squared Error Loss in Selective Assembly with Measurement Error

Abstract

Selective assembly is an effective approach for improving a quality of a product assembled from two types of components, when the quality characteristic is the clearance between the mating components. Mease et al. (2004 Mease , D. , Nair , V. N. , Sudjianto , A. ( 2004 ). Selective assembly in manufacturing: statistical issues and optimal binning strategies . Technometrics 46 : 165 – 175 .[Taylor & Francis Online], [Web of Science ®] , [Google Scholar]) have extensively studied optimal binning strategies under squared error loss in selective assembly, especially for the case when two types of component dimensions are identically distributed. However, the presence of measurement error in component dimensions has not been addressed. Here we study optimal binning strategies under squared error loss when measurement error is present. We give the equations for the optimal partition limits minimizing expected squared error loss, and show that the solution to them is unique when the component dimensions and the measurement errors are normally distributed. We then compare the expected losses of the optimal binning strategies with and without measurement error for normal distribution, and also evaluate the influence of the measurement error.