Izack Cohen

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This paper addresses the problem of loading a finite capacity, stochastic (random) and dynamic multi-project system. The system is controlled by keeping a constant number of projects concurrently in the system. A new approach, based on the Cross-Entropy (CE) method, is proposed to determine optimal loading of the system. Through numerical experiments, we(More)
We consider the problem of allocating resources to projects performed under given due dates and stochas-tic time– cost tradeoff settings. In particular, we show how to implement a state-of-the-art methodology known as " robust optimization " to solve the problem. In contrast to conventional approaches, the model we develop results in management policies(More)
This paper addresses the problem of resource allocation in a finite-capacity, stochastic (random) and dynamic multi-project system. The system is modeled as a queuing network that is controlled by limiting the number of concurrent projects. We propose a Cross Entropy (CE) based approach to determine near-optimal resource allocations to the entities that(More)
I n this article we present our concept of time-critical decision making, sometimes even in life-threatening situations , and compare it to the process of non-time-critical decision making. Decision-making methodologies have been extensively researched, and some of the published research deals with decision making within the context of everyday life.(More)
This paper presents an equipment description of a pilot on-line Sales Recording System currently in operation for the Associated Merchandising Corporation as part of a research project. This pilot system comprises point-of-sale units connected to a central computer by means of an Input-Output Buffer Unit. The operating characteristics of this system are(More)
A new class of discretization-based look-ahead algorithms (DLAAs) for the Dubins traveling salesperson problem (DTSP) is presented that compares favorably with the existing algorithms from the literature. The discretization level and the length of the look-ahead horizon are the two parameters that uniquely determine a DLAA, and depending on the application(More)
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