This paper presents a hybrid heuristic for constrained resource allocation in PERT type networks. Here, the assumption is made that the constrained resource is renewable for allocation to the activities of project. In addition, we consider finish-start precedence constraints with zero time lag. The activities durations are independent continuous random variables, preemption is not allowed and r...

Retroviruses are known as the causative agents of numerous animal disorders. In humans, this virus family is responsible for AIDS, certain forms of leukemias, and some neurologic disorders. The development in our laboratory of an ultrasensitive test for the retroviral enzyme reverse transcriptase has made possible detection of retroviruses present at very low concentration [1]. This test, the s...

This paper is a generalization of our previous publications [2,19-20] where some newly developed models of the harmonization theory, together with various practical applications, have been outlined. The goal of the paper under consideration is to describe in depth both the general concepts of the harmonization theory and the fitness of the latter by citing an example from a widely used class of...

The Critical Path Method (CPM) and its development to probabilistic environment, the Program Evaluation and Review Technique (PERT), are the most common tools for predicting and managing different short time or long time projects. However, one of the main difficulties in using mathematical models in real world applications is the vagueness and uncertainty of data and parameters such as activity...

Software has a far ranging nature and sometimes it is difficult to predict the cost. So, it was demanded to develop some useful models that predict the accurate cost, schedule and quality of a software product. There is a great need to accurately predict the cost by selecting the appropriate estimation method. Expert Based Judgment is quite successful. Wideband Delphi estimation comes under thi...

Abstract This research conducted in one construction company Indonesia, the was facing several problems, many projects that already ended have delays. Overdue payment of can reach Rp 252.544.148.-. For calculating late save researcher using Critical Path Method (CPM)-Crashing. CPM-Crashing method accelerate project duration by increase resource budget, so doesn’t need to pay overdue payment. Th...

We introduce an extension to an architecture-independent tool (VISTA) for creating displays of cognitive model behavior, the Categorical Data Display (CaDaDis). Our display offers several views of categorical data. It includes a standard Pert Chart showing tasks by category (or resource), a Nonstandard Pert Chart that shows the temporal dependencies, and a Gantt chart that helps show occurrence...