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By Lars Mönch, John W. Fowler, Scott J. Mason

During the last fifty-plus years, the elevated complexity and velocity of built-in circuits have substantially replaced our global. this present day, semiconductor production could be crucial phase of the worldwide production area. because the semiconductor has develop into extra aggressive, enhancing making plans and keep an eye on has develop into a key issue for company good fortune. This booklet is dedicated to construction making plans and regulate difficulties in semiconductor wafer fabrication amenities. it's the first ebook that takes a accomplished examine the function of modeling, research, and similar info platforms for such production structures. The publication presents an operations learn- and computing device science-based advent into this crucial box of semiconductor manufacturing-related study.

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Extra resources for Production Planning and Control for Semiconductor Wafer Fabrication Facilities: Modeling, Analysis, and Systems

Example text

4) for all s ∈ S, where we denote by S a finite set of feasible solutions and f is a real-valued objective function. Note that we can focus on maximization problems without loss of generality because we can tackle minimization problems by the same approach by simply maximizing − f . The notion of subproblems is important for branch-and-bound schemes. A subproblem is a subset S ⊆ S. We explain the three main ingredients of a branch-and-bound scheme as follows: • Branching: The problem S is replaced by a set of subproblems Si ⊆ S, i = 1, .

An interaction is given by an information exchange or an exchange of material or energy. We call S open when it interacts with its environment. When such an interaction does not occur, the system is a closed one. An input–output system is a system that totally hides the inside view on the system components. Input–output systems are also called black-box systems (cf. Mesarovi´c and Takahara [181]). A real system is a certain part of the real world. The components of real systems are physical. The BS of a wafer fab described in Chap.

A typical order release decision results in a set of jobs that have to be launched into a wafer fab at a certain point in time. Weekly or biweekly order release schemes are very common in semiconductor manufacturing. The order release scheme definitely affects the load and consequently the cycle times in wafer fabs. Therefore, order release also influences the planning decisions. Scheduling is defined as the process of allocation of scarce resources over time [34, 240]. The goal of scheduling is to optimize one or more objectives in a decision-making process.

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