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第17届工业工程与工程管理国际学术会议(IE&EM2010)

作者： Hong-an YANG~(1,2),Qi-feng SUN~(1,2),Jie GUO~(1,2) 1 Institute of System Integration & Engineering Management,Northwestern Polytechnical University,Xi'an,China 2 Key Lab of Contemporary Design and Integrated Manufacturing Technology,MOE,Northwestern Polytechnical University,Xi'an,China

The just-in-time production philosophy has led to a growing interest in scheduling problems considering both earliness and tardiness(E/T) *** E/T schedule model,with the consideration of different penalties for tardiness,earliness and flowtime of jobs,is introduced to minimize total production *** on classical genetic algorithm,a new Enhanced Genetic Algorithm(EGA) is designed to solve tardy and early *** order to avoid infeasible decoding solutions and reduce simultaneously tardiness costs,the chromosome-repair operator based on critical paths is put forward to solve the problem that some jobs violate the due date *** objective-value revision operator based on chromosome rescheduling is introduced to reduce in-process and final goods inventory costs by delaying job release *** proposed approaches have been tested on a wide range of 80 scheduling problems and satisfactory results have been obtained.

关键词： Chromosome-repair earliness and tardiness Genetic algorithm Job shop scheduling Objective-value revision

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Genetic Algorithm for Scheduling Problem of Chemical Batch Process with Due Date Constraints

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厦门大学学报（自然科学版） 2002年第S1期41卷 147-页

作者： SONG Jie-wei, RONG Gang (National Key Laboratory of Industrial Control Technology, Zhejiang U niversity, Hangzhou 310027, China)

The intense competition in the current marketplace ha s forced firms to reexamine their methods of doing business, using superior manu facturing practices in the form of just-in-time (JIT), production with JIT pra ctices pursue completion on time and zero inventory, which is often instruct ed according to the custom’s demand or the sale contract. earliness and tardine ss are undesirable because both of them will bring the extra cost, cost will als o be increased by some factors such as operation condition, intermediate storage , clean method, etc, to minimize the total cost is often the main scheduling objective, but sometime it is most important for factories to eliminate the tar diness cost in order to maintain the commercial credit and to avoid penalty, the refore, minimum of tardiness cost becomes the first objective. It is more import ant to select a reasonable objective by the actual condition during scheduli ng. In this paper scheduling problem of chemical batch process with due date is studied, two different intermediate storage policies and two different productio n modes are also discussed, production scheduling with different intermediate st orage policy and different production mode is proposed and the result is compare d. In order to complete all products within the due date, not only earliness and tardiness but also holding problem is considered, the objective is to selec t a proper intermediate storage policy and production mode and to minimize the c ost resulted by the earliness and tardiness, even the cost result by the interme diate storage. Scheduling with multiple stage and multiple machine is known as a NP-hard problem, mathematical program (MP) method, such as branch-and-bound (BAB), mixed integer linear program (MILP), etc, is often used to solve the sche duling problem. But as is well known, MP method is not good for combination opti mization, especially for large scale and complex optimal problem, whereas geneti c algorithm (GA) can overcome

关键词： batch process earliness and tardiness genetic a lgorithms hold cost intermediate storage JIT scheduling

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