This study presents and evaluates a modified ant colony optimization (ACO) approach for the resource-constrained project scheduling problems. A modified ant colony system is proposed to solve the resource-constrained scheduling problems. A two-dimensional matrix is proposed in this study for scheduling activities with time, and it has a parallel scheme for solving project scheduling problems. T...

during the implementation, construction projects usually encounter situation that considerably affects the project scheduling and cost. this study aims at using an improved version of the harmony search algorithm (hsa) to schedule resource constrained construction projects. this model is formulated as a global optimization problem. it will determine the duration of each activity to minimize the...

This article examines the complexity of resource-allocation decisions for resource-constrained project scheduling. The allocation decisions are modeled by means of precedence networks and are closely related to ES-policies, which are a type of scheduling policies introduced for stochastic scheduling. We find that even a number of ‘surrogate’ objective functions, whose use has recently been prop...

Resource-constrained project scheduling with activity pre-emption assumes that activities are allowed to be interrupted and restarted later in the schedule at no extra cost. In the current paper, we extend this pre-emptive scheduling problem with setup times between activity interruptions and the possibility to fast track pre-emptive subparts of activities. The contribution of the paper is twof...

New competitive results for the stochastic resource-constrained project scheduling problem: exploring the benefits of pre-processing We study the resource-constrained project scheduling problem with stochastic activity durations. We introduce a new class of scheduling policies for solving this problem, which make a number of a-priori sequencing decisions in a pre-processing phase while the rema...

Operation scheduling (OS) is an important task in the high-level synthesis process. An inappropriate scheduling of the operations can fail to exploit the full potential of the system. In this chapter, we try to give a comprehensive coverage on the heuristic algorithms currently available for solving both timing and resource constrained scheduling problems. Besides providing a broad survey on th...

In a recent paper Wei, Liu and Tsai present an ‘‘advanced TOC method for project scheduling under resource constraints’’. In this note we demonstrate that the authors (a) largely ignore the state of the art in resource-constrained project scheduling, (b) do not offer a correct application of the critical chain scheduling concepts, and (c) describe an alternative scheduling approach that is not ...

The CPM has proven to be helpful only when the project deadline is not fixed and the resources are not constrained by either availability or time. Resource-constrained scheduling arises as a result of problems with the availability of resources. It is necessary to apply the availability of resources into a scheduling process for this reason. The objective of this paper is to present an optimal ...