CONLOAD - a new lot release rule for semiconductor wafer fabs
نویسنده
چکیده
In this paper we present CONLOAD CONstant LOAD a new lot release rule for wafer fabs It was developed to overcome some performance problems of traditional lot release rules like CONWIP or Work load Regulation during product mix changes We show that CONLOAD outperforms CONWIP and Workload Regulation with respect to keeping the bot tleneck utilization at a desired level and to provide a smooth evolution of the WIP
منابع مشابه
ArticleThe optimal decision combination in semiconductor manufacturingSungwook Yoon
Wafer fabrication is a capital-intensive and highly complex manufacturing process. In a wafer fabrication facility (fab), wafers are grouped as a lot to go through repeated sequences of operations to build circuitry. Lot scheduling is an important task for manufacturers in order to improve production efficiency and satisfy customers’ demands of on-time delivery. Cycle time and average work-in-p...
متن کاملThe Optimal Decision Combination in Semiconductor Manufacturing
Wafer fabrication is a capital-intensive and highly complex manufacturing process. In a wafer fabrication facility (fab), wafers are grouped as a lot to go through repeated sequences of operations to build circuitry. Lot scheduling is an important task for manufacturers in order to improve production efficiency and satisfy customers’ demands of on-time delivery. Cycle time and average work-in-p...
متن کاملPerformance Analysis of Lot Release and Dispatching Decisions in Wafer Fabrication
Controlling semiconductor wafer fabrications (wafer fabs) is a difficult task because the water fabs have several distinct characteristics such as a large number of processes involved, long lead time, and re-entrant product flow. Typical operational control issues in the wafer fabs include job releasing, dispatching and batch loading decisions. Most of the research works on operational control ...
متن کاملA Framework for Standard Modular Simulation: Application to Semiconductor Wafer Fabrication
This paper presents the application of a framework, proposed by the National Institute of Standards and Technology (NIST), for standard modular simulation of semiconductor wafer fabrication facilities or fabs. The application of the proposed framework results in the identification and specification of four different elements in the context of semiconductor fabs: (1) market sector, (2) hierarchi...
متن کاملCONWIP-like Lot Release for a Wafer Fabrication Facility with Dynamic Load Changes
In numerous wafer fabrication facilities (wafer fabs) the load changes dynamically. Current load release control schemes are usually developed and tested in a constant load environment. In this paper, we discuss four CONWIP-like lot release policies and assess their ability to buffer variability generated by the load changes and to keep the lot release variability as low as possible. All contro...
متن کامل