This paper considers a single-machine scheduling with preventive periodic maintenance activities in remanufacturing system. Although the scheduling problem with maintenance has attracted researchers’ attention, most of past studies consider only non-preemptive jobs. In fact, there exist both preemptive and non-preemptive jobs due to their different processing technic in remanufacturing workshop...

Machine failure can have a significant impact on the throughput of manufacturing systems, therefore accurate modelling of breakdowns in manufacturing simulation models is essential. Finite mixture distributions have been successfully used by Ford Motor Company to model machine breakdown durations in simulation models of engine assembly lines. These models can be very complex, with a large numbe...

Efficient and on-time maintenance plays a crucial role inreducing cost and increasing the market share of an industrial unit. Preventivemaintenance is a broad term that encompasses a set of activitiesaimed at improving the overall reliability and availability of a systembefore machinery breakdown. The previous studies have addressed thescheduling of preventive maintenance. These studies have co...

Complex rotating machine trains especially trains including electric machines are subject to the most varied and often most severe torsional disturbances. If shaft or rotating component failures occur as a result of torsional oscillations, the consequences can be catastrophic. In this paper a comprehensive model and simulation method using analytical formulations are developed to study both ste...

We study the problem of unrelated parallel-machine scheduling with deteriorating maintenance activities. Each machine has at most one maintenance activity, which can be performed at any time throughout the planning horizon. The length of the maintenance activity increases linearly with its starting time. The objective is to minimize the total completion time or the total machine load. We show t...

Simulation is considered to be a method to improve planning and control efficiency in the field of logistics. In our view no existing simulation tool meets the basic requirements sufficiently. We therefore developed a new simulator with the following characteristics: • Simulation principles: General purpose discrete event simulator. • Modeling basis: Meta model comprising few specific basic ele...

Flexible manufacturing and customization is a considerable topic in modern manufacturing automobile industry. However, challenges still remain on the responsiveness of production system to the fluctuation of production demand. In this paper we developed a flexible machine layout that is not restricted to equal size machines. The layout optimizes the trade-offs between increased material handlin...

This paper presents a new mathematical model to solve cell formation problem in cellular manufacturing systems, where inter-arrival time, processing time, and machine breakdown time are probabilistic. The objective function maximizes the number of operations of each part with more arrival rate within one cell. Because a queue behind each machine; queuing theory is used to formulate the model. T...

Many vibration problems involve a general periodic excitation such as those of a triangular or rectangular waveform. In practice, the periodic excitation may become disordered due to uncertainties. This paper presents a stochastic model for general periodic excitations with random disturbance, which is constructed by introducing random amplitude and phase disturbances to individual terms in the...

This study derives the optimal run time for a production system with random defective rate and Poisson breakdown. In a real-life manufacturing system, generation of defective items and machine failures are inevitable. With the purpose of addressing these practical issues, this study examines a production system that has random defective items produced, and it also is subject to an equipment fai...