Abstract: This paper addresses a new analytical approach to evaluate the throughput of a buffered two-workstation manufacturing system with unreliable parallel machines. The parallel machines are not necessarily identical. The failure, repair and processing times of each machine are assumed to be exponentially distributed. The proposed method is based on two steps. The first step consists of tr...

The effect of the various design factors on the production rate in a parallel line is discussed by a Markov model and the difference of the effect between parallel lines and series lines is represented. A simple and effective scale is proposed to evaluate the availability of a parallel line and the production rate of a parallel line is approximately estimated by the scale and the relation betwe...

recognition of relationship between the present day stress state and fractures is very important in fractured reservoirs. fractures that are parallel or oblique to maximum horizontal stress have more tendencies to tensile deformation and tensile deformed fractures will be more permeable. the dalan formation is one of the main gas reservoirs of iran witch most of the production from this formati...

Due to the variety of products, simultaneous production of different models has an important role in production systems. Moreover, considering the realistic constraints in designing production lines attracted a lot of attentions in recent researches. Since the assembly line balancing problem is NP-hard, efficient methods are needed to solve this kind of problems. In this study, a new hybrid met...

I describe a methodology for optimising n Shewhart -charts x operating on parallel production lines in a factory. The goal is to maximise the factory-wide probability of detecting an out-of-control condition subject to a constraint on the expected number of false signals. I use non-linear programming to appropriately set the -charts’ x control limits incorporating information about the probabil...