Hybrid flow-shop or flexible flow shop problems have remained subject of intensive research over several years. Hybrid flow-shop problems overcome one of the limitations of the classical flow-shop model by allowing parallel processors at each stage of task processing. In many papers the assumptions are generally made that there is unlimited storage available between stages and the setup times a...

The flexibility present in a job shop is an important determinant of the future success of the shop, since it increases the ability to deal with the changes a job shop is faced with in a dynamic environment. The presence of idle-time in a job shop schedule contributes considerably to this flexibility. By introducing an anticipation factor that preserves idletime in the scheduling process more f...

We develop a search-theoretic model of the product market that generates price dispersion across and within stores. Buyers differ with respect to their ability to shop around, both at different stores and at different times. The fact that some buyers can shop from only one seller while others can shop from multiple sellers causes price dispersion across stores. The fact that the buyers who can ...

摘要 現場管制系統是ERP的主要子系統之一, 其主要功能是安排現場訂單的排程. 根據研 究,大部分現場的排程問題是屬於 Job Shop問 題. 所以過去幾十年來 Job Shop問題一直是 產業界與學術界重要的研究課題之一. 其間 雖有無數的論文發表, 但因缺少考慮現場實際 的狀況, 很少研究的成果可以用來解決現場的 排程問題. 本研究開發以 Tabu Search為主的 排程方法. 經以個人在美國工作現場所使用之 MRP II 系統所產生的資料驗證, 本方法確能 有效求解現場的排程問題. 關鍵字: Job Shop, Tabu Search Abstract Shop floor control system is a sub-system of the ERP system. Its major function is to generate daily schedules f...

We develop a search-theoretic model of the product market that generates price dispersion across and within stores. Buyers differ with respect to their ability to shop around, both at different stores and at different times. The fact that some buyers can shop from only one seller while others can shop from multiple sellers causes price dispersion across stores. The fact that the buyers who can ...

This paper provides a simulation model to study the effect of the work-in-process control on due date performance in job shop environment. The due date performance is measured by both the number of tardy jobs and the total tardiness. The simulation runs include different shop configurations (flow shop and general job shop), workloads and sequencing rules. As expected, the results reveal that du...

In a shop floor of the industry, the routings which are based upon the jobs that need to be processed on different machines are one among the major activities and therefore the resource requirements are not based upon the quantity as in a flow shop but rather the routings for the products being produced. However, both job shop and flow shop production cope with a scheduling problem to find a fe...

The underlying model of an electronic payment system consists of three parties: a bank, a customer, and a shop. There are three different types of transactions within the system: withdrawal involving the bank and the customer, payment involving the customer and the shop, and deposit involving the shop and the bank. The customer's account is debited during withdrawal, and the shop is credited du...

This paper describes the radiotherapy patient scheduling problem of minimising waiting times. Like many other service industry problems, radiotherapy patient scheduling may be solved by first modelling and formulating it into a shop scheduling problem. Over the years, these shop scheduling models have been researched and solved using various approaches. This paper typifies radiotherapy patient ...

The authors discuss the concept and design criteria for a framework that facilitates the performance assessment of shop-floor control systems. Their basic concept includes a simulation model that emulates the shop floor of a wafer fab, sends information to the control system, and receives information back from the control system. The shop-floor control system is realized as a separate module th...