The question, 'Why use a mathematical programming model at the sectoral level?' is addressed. To address this question, discussion is presented mathematically and verbally upon mathematical programming sector ...
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The question, 'Why use a mathematical programming model at the sectoral level?' is addressed. To address this question, discussion is presented mathematically and verbally upon mathematical programming sector models in which both price and quantity are endogenous variables. The discussion covers both the theoretical properties and the empirical concerns which must be faced in applying such models. Discussion is also presented upon the usefulness of the modeling approach for policy analysis. Selected bibliograpic citations' use of the approach in policy analysis are given. [ABSTRACT FROM AUTHOR]
A preference order dynamic programming model proposed in the literature for solving stochastic knapsack problems is shown to be somewhat limited from both the methodological and computational points of view. A counter...
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A preference order dynamic programming model proposed in the literature for solving stochastic knapsack problems is shown to be somewhat limited from both the methodological and computational points of view. A counterexample is presented contradicting the optimality of a procedure designed for normal variates.
The selection of capital projects in a production environment is complicated by the existence of multiple and conflicting goals. Typical production objectives for cost minimization often conflict with goals for qualit...
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The selection of capital projects in a production environment is complicated by the existence of multiple and conflicting goals. Typical production objectives for cost minimization often conflict with goals for quality, environmental standards, labor relations, etc. This problem of project selection is further complicated by the uncertainty inherent in product demand, the key factor in production management. This paper approaches these complications by employing an integer goal programming (to compensate for multiple conflicting objectives) with chance-constrained capabilities (to reflect uncertainty in product demand). The approach is demonstrated via an in-depth case example of a production problem.
Mathematical programming models present an approach to solving multicriteria decision problems. This paper compares two such models. One based on fuzzy set theory, the other relying on utility functions and the maximi...
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Mathematical programming models present an approach to solving multicriteria decision problems. This paper compares two such models. One based on fuzzy set theory, the other relying on utility functions and the maximin decision criteria. The two models have identical form. The paper also illustrates the relationship between fuzzy set theory and multi-criteria decision making.
ABSTRACT: This study analyzes planning under deterministic and stochastic inflows for the Mayurakshi project in India. models are developed to indicate the optimal storage of reservoir water, the transfer of water to ...
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One of the major contributions to the planning and management of Research and Development organizations is the evolution of methods for dealing with PERT-Cost or CPM-Cost problems. Classically however, variations of t...
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One of the major contributions to the planning and management of Research and Development organizations is the evolution of methods for dealing with PERT-Cost or CPM-Cost problems. Classically however, variations of the critical path-cost (CPM-Cost) problem, arising when different cost duration relationships are assumed, have been mostly studied via techniques other than dynamic programming. If the precedence relations possess a serial structure, one can develop two essentially equivalent dynamic programming formulations, of the resource allocation variety, by minimizing either the project cost or the completion time. When nonserial precedence relationships are involved, this problem cannot be solved by routine invocation of conventional dynamic programming formulations or algorithms. The intent of this paper is to show that efficient nonserial dynamic programming formulations can be developed for several complex nonserial CPM-Cost problem situations. In particular, the project time minimization procedure results in less complex dynamic programming models and is thus employed in this paper. Three recent computational reduction techniques based primarily on the introduction of the artifice of pseudo-tasks and pseudo-stages are invoked to treat different variations of this essentially nonserial critical path-cost problem. Considerable savings in computational requirements are achieved by consolidating all phases preceding a junction node prior to the invocation of the dynamic programming procedure. The advantages of these approaches over existing mathematical programming methods include their ability to handle nonlinear cost functions and constraints, as well as their highly efficient parametrization capabilities. Further, the complexity of the dynamic programming formulation does not, unlike other methods, increase with the number of phases (tasks) but only with the degree in which the additional tasks change the structure of the precedence relations.
A recent article described a mathematical programming model and heuristic solution procedure to realign sales territories. This report presents two linear integer programming models for sales territory alignment to ma...
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A recent article described a mathematical programming model and heuristic solution procedure to realign sales territories. This report presents two linear integer programming models for sales territory alignment to maximize profit. Emphasis is placed on the development of models which are easy to implement.
We introduce steady state policies for a class of infinite horizon, deterministic, discounted dynamic programming models with compact–convex state spaces, compact action spaces and continuous cost and transition func...
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We introduce steady state policies for a class of infinite horizon, deterministic, discounted dynamic programming models with compact–convex state spaces, compact action spaces and continuous cost and transition functions. Steady state policies are stationary policies under which a system moves to a steady state in a given number of steps. Because of their simple structure, it is sometimes easy to solve problems where one considers only steady state policies. Although such a restriction is sometimes costly (e.g., in many inventory models), there are cases where it is quite reasonable. In this paper we find conditions under which there exists a good steady state policy, i.e., one whose cost differs from the optimal cost by an amount whose bound is independent of the discount factor. (Such policies are optimal with respect to the average cost criterion.) We also give examples of models which satisfy these conditions. Our results depend on Brouwer’s fixed-point theorem.
An analysis was made of errors which can result from regional aggregation in spatial linear programming models. The agricultural sector of Portugal provided the empirical base for the analysis. programming solutions w...
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An analysis was made of errors which can result from regional aggregation in spatial linear programming models. The agricultural sector of Portugal provided the empirical base for the analysis. programming solutions were obtained first for eleven regions and then for three regions which were aggregates of the eleven regions. It is concluded that significant errors which resulted from this form of aggregation can be reduced or eliminated by intraregional stratification of production activities and resources and a priori specification of intraregional transport cost. [ABSTRACT FROM AUTHOR]
A mathematical programming model and linear programming solution procedure are developed to assign salesmen to accounts and simultaneously to determine appropriate time allocations to the accounts. The model is useful...
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A mathematical programming model and linear programming solution procedure are developed to assign salesmen to accounts and simultaneously to determine appropriate time allocations to the accounts. The model is useful for sales situations in which geographic locations of accounts are close and the interaction of the salesman with the account is relatively important in the marketing mix. An implementation example is discussed.
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