In project management, three quantities are often used by project managers: the earliest starting date, the latest starting date and the float of tasks. These quantities are computed by the Program Evaluation and Review Techniques/Critical Path Method (PERT/CPM) algorithm. When task durations are ill known, as is often the case at the beginning of a project, they can be modeled by means of inte...

earned value management is a critical project managementmethodology that evaluates project performance from cost andschedule viewpoints. the novel theoretical framework presented in thispaper estimates future performance of project regarding the past relativeinformation. it benefits from fuzzy regression (fr) models in estimationprocess in order to deal with the vagueness and impreciseness ofre...

Due to the increase in population all over world, term city development has emerged using method of sustainable green cities, which are cities designed taking into account environmental impact reduce required input from energy, water, and food production. This study discusses this topic with three main objectives; first is analyze project work network Sustainable Green City Development Project,...

in this paper, shortest path design problem (spdp) in which the path is incident to all cells is considered. the bi-directional path is one of the known types of configuration of networks for automated guided vehi-cles (agv).to solve this problem, two algorithms are developed. for each algorithm an integer linear pro-gramming (ilp) is determined. the objective functions of both algorithms are t...

In most cases, the project management is dealing with the “intelligent” reuse of know-how from previous projects and its adaptation to a similar, new project. Until now, purely quantitative and “hard” project management techniques like the critical path method and the project evaluation and review technique have been dominant. With this main stream approach, only simply structured logistics pro...

The problem faced by one of the private construction companies in Jakarta, Indonesia is delay completing grounding and lightning protection installation project. This resulted both material immaterial losses for company. Factors that are thought to cause delays this project include man, machine, material, environment factors. method used research Critical Path Method (CPM) Crashing accelerate d...

The least squares problem is formulated in terms of lp quasi-norm regularization (0 < p < 1). Two formulations are considered: (i) an lp-constrained optimization and (ii) an lp-penalized (unconstrained) optimization. Due to the nonconvexity of the lp quasi-norm, the solution paths of the regularized least squares problem are not ensured to be continuous. A critical path, which is a maximal cont...

This paper proposes “path mapping”, a method of delay estimation for technology independent combinational circuits. Path mapping provides fast and accurate delay estimation using the common ideas with the tree covering based technology mapping. First, path mapping does technology mapping for all paths in the circuit with minimum delay. Then, it finds the most critical path among all the paths i...

In this paper, we focus on the problem of secure multicast in dynamic groups. In this problem, a group of users communicate using a shared group key. Due to the dynamic nature of these groups, to preserve secrecy, it is necessary to change the group key whenever the group membership changes. While the group key is being changed, the group communication needs to be interrupted until the rekeying...