This article provides a new multi-objective integer programming model for the daily scheduling of nurses in operating suites. The model is designed to assign nurses to different surgery cases based on their specialtie...
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This paper explores two important themes in the implementation of RFID in supply chain management: (1) analyzing differences between actual (perceived) and potential (expected) key benefits to see if there are benefit...
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ISBN:
(纸本)9781424472956
This paper explores two important themes in the implementation of RFID in supply chain management: (1) analyzing differences between actual (perceived) and potential (expected) key benefits to see if there are benefit shortfalls for the key performances;and (2) performing a two-dimensional expectation- perception analysis (EPA) for the purpose of identifying competitive niche and strategically allocating and adjusting the company's resources. Empirical data were collected through surveys of executives of selected Taiwan based companies who had experienced RFID adoption in the supply chain practices. Finally, managerial implications and suggestions were provided for companies and industries that may be considering the adoption of RFID in SCM.
This paper explores two important themes in the implementation of RFID in supply chain management: (1) analyzing differences between actual (perceived) and potential (expected) key benefits to see if there are benefit...
详细信息
This paper explores two important themes in the implementation of RFID in supply chain management: (1) analyzing differences between actual (perceived) and potential (expected) key benefits to see if there are benefit shortfalls for the key performances; and (2) performing a two-dimensional expectation-perception analysis (EPA) for the purpose of identifying competitive niche and strategically allocating and adjusting the company's resources. Empirical data were collected through surveys of executives of selected Taiwan based companies who had experienced RFID adoption in the supply chain practices. Finally, managerial implications and suggestions were provided for companies and industries that may be considering the adoption of RFID in SCM.
In semiconductor manufacturing, wafers are processed and transported in batches of a constant size (called lots), typically 25 wafers. As part of the overall goal of shortening product cycle times without sacrificing ...
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In semiconductor manufacturing, wafers are processed and transported in batches of a constant size (called lots), typically 25 wafers. As part of the overall goal of shortening product cycle times without sacrificing throughput in wafer fabrication facilities (fabs), one idea the manufacturers are contemplating is reducing the lot size. Smaller lot sizes are now an option due to several technological and logistical advances in the industry. The transition to larger wafers (from 300 mm to 450 mm in diameter) in the next generation fabs may increase the advantages of smaller lot sizes. In this study, we analyze and evaluate the effect of lot size on cycle time and work-in-process inventory performance measures using several single machine queuing models. We support our analytical findings by a computational example. Our preliminary results indicate that reducing the lot size decreases the cycle time but, the scale of the cycle time reduction depends on the system variance and technology improvement. While the system variance limits the reduction in cycle times due to the lot size reduction, poor technology improvement may result with even higher cycle times.
In this paper, we assess the benefits of risk pooling in the service parts logistics systems. We formulate a special case of the Network Design Inventory Problem (NDIP) and define conditions for which complete central...
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In this paper, we assess the benefits of risk pooling in the service parts logistics systems. We formulate a special case of the Network Design Inventory Problem (NDIP) and define conditions for which complete centralization and complete decentralization are optimal. Computational results show that the range of cost parameter values within which partial decentralization is optimal is very small. As a result, in most cases the optimal solution is either close to complete decentralization or close to complete centralization. Finally, we develop an algorithm that evaluates a small set of solutions that form an efficient frontier over the rest of the feasible solutions.
We propose a two-stage hierarchical model for scheduling preventive maintenance tasks in semiconductor fabrication. Given a set of tasks and time windows in which those tasks must be performed, a higher level model wi...
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We propose a two-stage hierarchical model for scheduling preventive maintenance tasks in semiconductor fabrication. Given a set of tasks and time windows in which those tasks must be performed, a higher level model will place each task inside a 12-hour shift, while a lower level model schedules each task within the shift given by the higher level model. We describe the higher level model, suggest a heuristic to obtain upper and lower bounds on the optimal solution, and present computational results that examine the relationship between the tightness of the bounds and the problem parameters.
Scheduling in semiconductor wafer fabrication is viewed important due to its effect on both proper utilization of expensive equipment and cycle time. The complex nature of manufacturing processes used in semiconductor...
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Scheduling in semiconductor wafer fabrication is viewed important due to its effect on both proper utilization of expensive equipment and cycle time. The complex nature of manufacturing processes used in semiconductor manufacturing makes scheduling and other activities such as process and quality control more critical and more interdependent on each other. We investigate the interdependency, interaction, and potentially needed coordination between scheduling and advanced process control decisions. As a first step, we analyze the issue using simple models (single machine settings) both analytically and computationally, and draw insights for more complex and realistic situations.
We develop a sequential sampling procedure for solving a class of stochastic programs. A sequence of feasible solutions, with at least one optimal limit point, is given as input to our procedure. Our procedure estimat...
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ISBN:
(纸本)9781424413065
We develop a sequential sampling procedure for solving a class of stochastic programs. A sequence of feasible solutions, with at least one optimal limit point, is given as input to our procedure. Our procedure estimates the optimality gap of a candidate solution from this sequence, and if that point estimate is sufficiently small then we stop. Otherwise, we repeat with the next candidate solution from the sequence with a larger sample size. We provide conditions under which this procedure: (i) terminates with probability one and (ii) terminates with a solution which has a small optimality gap with a prespecified probability.
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