A Computational Study on Bounding the Makespan Distribution in Stochastic Project Networks
نویسندگان
چکیده
Given a stochastic project network with independently distributed activity durations, several approaches to bound the distribution function of the project completion time have been proposed. We have implemented the most promising of these algorithms and compare their behavior on a basis of nearly 2000 instances with up to 1200 activities of different test-beds. We propose a suitable numerical representation of the given distributions which is the basis for excellent computational results.
منابع مشابه
A Multi Objective Fibonacci Search Based Algorithm for Resource Allocation in PERT Networks
The problem we investigate deals with the optimal assignment of resources to the activities of a stochastic project network. We seek to minimize the expected cost of the project include sum of resource utilization costs and lateness costs. We assume that the work content required by the activities follows an exponential distribution. The decision variables of the model are the allocated resourc...
متن کاملMinimizing Makespan in a Multiclass Fluid Network with Parameter Uncertainty
We introduce and investigate a new type of decision problem related to multiclass fluid networks. Optimization problems arising from fluid networks with known parameters have been studied extensively in the queueing, scheduling, and optimization literature. In this article, we explore the makespan problem in fluid networks, with the assumption that the parameters are known only through a probab...
متن کاملA New Lower Bound for Completion Time Distribution Function of Stochastic PERT Networks
In this paper, a new method for developing a lower bound on exact completion time distribution function of stochastic PERT networks is provided that is based on simplifying the structure of this type of network. The designed mechanism simplifies network structure by arc duplication so that network distribution function can be calculated only with convolution and multiplication. The selection of...
متن کاملDesigning and implementation of an unmanned aerial vehicle for inspection of electricity distribution networks
One of the most crucial elements of each country is electricity distribution networks (EDN). Awareness of accidents in EDN could be very important in the conservation and utilization of them. The accurate and periodic inspections can provide a good service to subscribers. The goal of this project is to fabricate a quad rotor, which can do an accurate and a periodic inspection. The design and im...
متن کاملCombination of Approximation and Simulation Approaches for Distribution Functions in Stochastic Networks
This paper deals with the fundamental problem of estimating the distribution function (df) of the duration of the longest path in the stochastic activity network such as PERT network. First a technique is introduced to reduce variance in Conditional Monte Carlo Sampling (CMCS). Second, based on this technique a new procedure is developed for CMCS. Third, a combined approach of simulation and ap...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Annals OR
دوره 102 شماره
صفحات -
تاریخ انتشار 2001