Read e-book online Average—Cost Control of Stochastic Manufacturing Systems PDF

By Suresh P. Sethi

ISBN-10: 0387219471

ISBN-13: 9780387219479

ISBN-10: 0387276157

ISBN-13: 9780387276151

This publication is worried with hierarchical keep watch over of producing structures lower than uncertainty. It makes a speciality of method functionality measured in long-run common expense standards, exploring the connection among keep an eye on issues of a reduced rate and that with a long-run normal expense in reference to hierarchical regulate. a brand new thought is articulated that indicates that hierarchical selection making within the context of a goal-seeking production process can result in a close to optimization of its target. The procedure within the ebook considers production platforms during which occasions ensue at various time scales.

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Extra info for Average—Cost Control of Stochastic Manufacturing Systems

Example text

1. 6). The extension of results to other cases is standard. 2. A function u(·, ·) defined on n ×M is called an admissible feedback control, or simply a feedback control, if: (i) for any given initial surplus x and production capacity k, the equation d x(t) = u(x(t), k(t)) − z dt has a unique solution; and (ii) the control defined by u(·) = {u(t) = u(x(t), k(t)), t ≥ 0} ∈ A(k). With a slight abuse of notation, we simply call u(·, ·) a feedback control when no ambiguity arises. ✷ Let g(x, u) : n × n+ → For any u(·) ∈ A(k), define + denote the surplus and production cost.

Let h(x) and c(u) denote the surplus cost and the production cost functions, respectively. For every u(·) ∈ A(k), x(0) = x, k(0) = k, define J(x, k, u(·)) = lim sup T →∞ 1 E T T [h(x(t)) + c(u(t))] dt. 3) 0 The problem is to choose an admissible u(·) that minimizes the cost functional J(x, k, u(·)). We define the average-cost function as λ∗ (x, k) = inf u(·)∈A(k) J(x, k, u(·)). 4) We will show in the sequel that λ∗ (x, k) is independent of (x, k). So λ (x, k) is simply written as λ∗ hereafter. Now let us make the following assumptions on the cost functions h(x) and c(u), generator Q, and set M.

Formally we can write the HJBDD equation for our problem as ρφρ (x, k) = inf {∂u−z φρ (x, k) + g(x, u)} + Qφρ (x, ·)(k). 1, we can establish the smoothness of V ρ (x, k). We have the following result. 2. Let Assumptions (A3) and (A6) hold. 85) for all x ∈ n . 3, we must first obtain some estimates for the value function V ρ (x, k). 1. Let Assumptions (A3) and (A7) hold.

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

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