In a modern machining system, tool condition monitoring systems are needed to get higher quality production and to prevent the downtime of machine tools due to catastrophic tool failures. Also, in precision machining processes surface quality of the manufactured part can be related to the conditions of the cutting tools. This increases industrial interest for in-process tool condition monitorin...

In ultrasonic metal welding (UMW), tool wear significantly affects the weld quality and maintenance constitutes a substantial part of production cost. Thus, condition monitoring (TCM) is crucial for UMW. Despite extensive literature focusing on TCM other manufacturing processes, limited studies are available Existing methods UMW require offline high-resolution measurement surface profiles, whic...

Purpose – The purpose of this paper is to develop a model that incorporates the effect of rejection cost on optimal maintenance planning decisions. Such a model will help in further modelling the interrelationships between preventive maintenance and quality control policy. Design/methodology/approach – In this paper a model is developed for obtaining optimal preventive maintenance interval base...

This paper presents a method to find the optimal production, repair/replacement and preventive maintenance policies for a degraded manufacturing system. The system is subject to random machine failures and repairs. The status of the system is deemed to degrade with repair activities. When a failure occurs, the machine is either repaired or replaced, and a replacement action renews the machine, ...

In this paper, a single-product, single-machine system under Markovian deterioration of machine condition and demand uncertainty is studied.  The objective is to find the optimal intervals for inspection and preventive maintenance activities in a condition-based maintenance planning with discrete monitoring framework. At first, a stochastic dynamic programming model whose state variable is the ...

For the investment decision for new production equipment it becomes more and more common to guarantee the total amount of life-cycle-costs (LCC). In the research project "LoeWe", funded by the German Federal Ministry of Education and Research (BMBF), methods are developed to minimize life cycle costs in the development, operation and recycling phase. Exemplarily the development of an innovative...

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--------------------------------------------------------ABSTRACT----------------------------------------------------------The significance of decision making from the maintenance perspective has long been acknowledged by the manufacturing industry. Appropriate maintenance alternative decision making increases machine reliability and enhances both productivity and product quality. By contrast, p...

Effective maintenance keeps machines in good working condition, improving the machine availability during production. It also minimizes the process failure rate due to component failure, resulting into improved product quality. In this paper the interrelationship between maintenance, production scheduling and quality control is captured using an integrated approach. A mathematical model compris...