Abstract
This paper proposes an approach to the planning and optimization of quality inspections within a multistage manufacturing process based on quality costs and the value added to the production process by inspections. Inspection errors and the resulting costs of repair and scrapping are taken into account. In addition, the capability of the manufacturing process and of the inspection system is included. A mathematical model for calculating quality costs was developed with a focus on its practical application.
Highlights
Quality inspection (QI) is an inherent part of the production process [1, 2]
The aim of this paper is to develop a model for calculating quality costs which is general enough to be valid in relation to the multistage production process while, at the same time, has a mathematical form which is understandable for those who wish to apply the resulting dependencies for inspection planning and optimization
The goal of this paper is to develop a model of quality costs that can be used when planning quality inspection (QI) parameters in a manufacturing process (MP) consisting of a sequence of N separate manufacturing process stages (MPS) within which, parts, subassemblies or products, hereby referred to as items, are processed
Summary
Quality inspection (QI) is an inherent part of the production process [1, 2]. Along with the development of measurement systems, vision systems and information technologies, a greater integration of QI within the production process has been observed [3, 4]. QI is still carried out as a separate operation with the use of traditional measuring instruments and with a significant human contribution. This method of conducting QI generates additional costs; it seems advisable to determine its efficiency [5,6,7]
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