This paper presents the mixed-integer nonlinear programming (MINLP) optimization model for the nonlinear discrete time–cost trade-off problem (NDTCTP). The nonlinear total project cost objective function of the proposed MINLP optimization model is subjected to a rigorous system of generalized precedence relationship constraints between project activities, project duration constraints, logical c...

Time -Cost trade-off is a known and important problem in project management, because project managers should decide that whether they want to shorten the time of a project and tolerate its execution costs or minimize the costs and accept delays. It was recently suggested that the quality of a project should also be taken into considerations in this decision-making. In this paper, a meta-heurist...

Hybrid Wireless Mesh Networks (WMN) are generally employed to establish communication during disaster recovery operations. The Hybrid WMN network is formed in a spontaneous manner when wireless nodes belonging to different agencies are operated in the disaster area. These wireless nodes generally have heterogeneous configurations in terms of number of transceivers, computational power, battery ...

We develop a stochastic model of a simple protocol for the self-configuration of IP network interfaces. We describe the mean cost that incurs during a selfconfiguration phase and describe a trade-off between reliability and speed. We derive a cost function which we use to derive optimal parameters. We show that optimal cost and optimal reliability are qualities that cannot be achieved at the sa...

Time–cost trade-off problems (TCT) are well-known in project management contents. This approach normally applied for scheduling of a project especially where the project should be completed under pre-determined deadline. This paper aims to extend time-cost trade-off (TCT) problems in order to provide a well-organized mechanism for both scheduling and rescheduling processes of a project. The pro...

In this paper, we model a multi-mode time-cost-quality trade-off project scheduling problem under generalized precedence relations using mixed-integer mathematical programming. Several solution procedures, including the classic epsilon-constraint (CEC) method, the efficient epsilonconstraint (EEC) method, dynamic self-adaptive multi-objective particle swarm optimization (DSAMOPSO), and the mult...

Time and cost are among the important aspects considered for every construction project. Many research approaches have been followed to model time-cost relationship. There is a constant rise in the use of innovative contract methods which provide incentives for maximizing quality. There is an increasing pressure to improve the project performance due to the innovative contracting methods which ...

Time-cost trade off problem (TCTP), known in the literature as project crashing problem (PCP) and project speeding up problem (PSP) is a part of project management in planning phase. In this problem, determining the optimal levels of activity durations and activity costs which satisfy the project goal(s), leads to a balance between the project completion time and the project total cost. A large...

This paper presents a new multi-objective Time-Cost Trade-Off (TCTO) model for Critical Chain Project Management (CCPM) networks. The presented model helps crashing a project with little, or no, additional cost. As combinatorial optimization problems' finding optimal decisions are difficult and is time consuming; considering the number of possible permutations involved for TCTO optimization, th...

With the growth of Utility Grids and various Grid market infrastructures, the need for efficient and cost effective scheduling algorithms is also increasing rapidly, particularly in the area of meta-scheduling. In these environments, users not only may have conflicting requirements with other users, but also they have to manage the trade-off between time and cost such that their applications ca...