A natural generalization of the criticality notion in a network with fuzzy activity times is given. It consists in direct application of the extension principle of Zadeh to the notion of criticality of a path (an activity, an event) treated as a function of the activities duration times in the network. There are shown some relations between the notion of fuzzy criticality, introduced in the pap...

In Wireless Sensor Networks, data collection by the Mobile Sink (MS) from the sensor nodes is a challenging task. In the proposed approach, the MS visits an optimal set of subsinks in order to collect data instead of visiting all the nodes in the network. In this paper, the subsink selection has been proven to be optimal since the subsinks are chosen by the Critical Path Method (CPM). Initially...

Stochastic activity networks (SANs) such as those arising in Project Evaluation Review Technique (PERT) and Critical Path Method (CPM) are an important classical set of models in operations research. We focus on sensitivity analysis for stochastic activity networks when Monte Carlo simulation is employed. After a brief aside reminiscing on Saul’s influence on the author’s career and on the simu...

Effective and detailed planning of large-scale, complex construction projects is of great importance to fulfilling project cost and time objectives. At Tsinghua University of China and The Hong Kong Polytechnic University, the four dimensional-computer aided design (4D construction operations simulation methodology have been researched for years respectively, resulting in innovative, in constru...

Modern processors come close to executing as fast as true dependences allow. The particular dependences that constrain execution speed constitute the critical path of execution. To optimize the performance of the processor, we either have to reduce the critical path or execute it more efficiently. In both cases, it can be done more effectively if we know the actual instructions that constitute ...

Earned value management (EVM) is widely used when monitoring and estimating operations related to construction projects. As the scope complexity of projects expand, traditional EVM sometimes ineffective even results in conclusions that are contrary actual situation. Additionally, estimate produced by a deterministic does not account for uncertainty activities involved project. This study propos...