Download PDF by Suresh P. Sethi: Average-Cost Control of Stochastic Manufacturing Systems

By Suresh P. Sethi

ISBN-10: 0387219471

ISBN-13: 9780387219479

Such a lot production platforms are huge, complicated, and function in an atmosphere of uncertainty. it's common perform to regulate such platforms in a hierarchical model. This publication articulates a brand new conception that exhibits that hierarchical choice making can in truth bring about a close to optimization of approach targets. the cloth within the booklet cuts throughout disciplines. it's going to attract graduate scholars and researchers in utilized arithmetic, operations administration, operations study, and procedure and keep an eye on thought.

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Additional resources for Average-Cost Control of Stochastic Manufacturing Systems

Example text

On the one hand, the monotonicity property can be used to solve some optimal control problems in a closed form, which are otherwise difficult to handle. On the other, it can greatly reduce computations needed for numerical approaches for solving the problem. The plan of the chapter is as follows. 2 we precisely state the production–inventory model under consideration. 3 we establish a systematic approach of constructing the ergodic (stable) control policies. In addition, we develop some estimates for the value function of the corresponding discounted cost problems.

Un (t)) ∈ n+ , x(t) = (x1 (t), . . , xn (t)) ∈ n , z = (z1 , . . , zn ) ∈ n+ denote the rates of production of n different products, the vector of their surpluses, and the rates of their demand, respectively. 6) where ri > 0 (i = 1, 2, . . , n) is the amount of capacity required to process one unit of the ith product at rate 1. 7) denoting the vector of initial surplus levels. 1. In the model formulated here, simultaneous continuous production of different products is allowed. 2. 2. Without any loss of generality, we may set r1 = 1.

The optimality of the control u∗ (·) in the (natural) class of all admissible controls. Let u(·) ∈ A(k) be any control and let x(·) be the corresponding surplus process. Suppose that J(x, k, u(·)) < λ. 44) Set f (t) = E[h(x(t)) + c(u(t))]. Without loss of generality we may assume that t 0 f (s) ds < ∞, for each t > 0, or else, we would have J(x, k, u(·)) = ∞. Note that J(x, k, u(·)) = lim sup T →∞ while 1 T ∞ ρJ ρ (x, k, u(·)) = ρ T f (s) ds, 0 e−ρs f (s) ds. 44) to obtain lim sup ρJ ρ (x, k, u(·)) < λ.

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Average-Cost Control of Stochastic Manufacturing Systems by Suresh P. Sethi

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