Genetic algorithm for project time-cost optimization in fuzzy environment

Haque, Khan Md. Ariful; Hasin, M. Ahsan Akhtar

doi:10.3926/jiem.410

Cited by 16 publications

(10 citation statements)

References 20 publications

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“…Using a building construction project as a case study and applying the two project scheduling methods namely PERT and CPM to determine numerically the different types of floating times of each activity and hence determined the central path which plays an important role in the project completion time. [41] developed a more realistic approach to solve project time cost optimization problem under certain conditions with fuzzy time periods. The proposed model used in the project leads decision makers to choose the desired solution under different risk levels.…”

Section: Determine the Critical Pathmentioning

confidence: 99%

Modelling Building Renovation Using PERT

Akpan

Agadaga

2020

ARJOM

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Effective project management techniques are critical to managers and decision makers in handling projects in today’s competitive environment. It is required that with such techniques, managers can carry out projects and complete them within specified time and resource constraint. This research considers the application of Program Evaluation and Review Technique (PERT). PERT was used to analyze data collected from Mega Star Technical and Construction Company in charge of the renovation/building construction of renovaworks at 48 Forces Avenue, Old GRA, Port Harcourt, Nigeria. The technique was used to obtain the network diagram, critical path, expected completion time for the project and the probability of completion within a required date. Ms Project version (2013) software was also used for the analyses. Results obtained revealed that the project can be completed within record time and possess a very high probability of completing the project within a stipulated date.

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Section: Determine the Critical Pathmentioning

confidence: 99%

Modelling Building Renovation Using PERT

Akpan

Agadaga

2020

ARJOM

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“…Powstało wiele modyfikacji tej metody, uwzględniających np. niedeterministyczny charakter danych (Feng, Liu i Burns, 2000;Haque i Hasin, 2012) lub heurystyczne metody poszukiwania rozwiązania optymalnego, w przypadku gdy funkcje kosztów są określone w sposób dyskretny (Parveen i Saha, 2012).…”

Section: Wstępunclassified

Untitled

2017

ACTA SCIENTIARUM POLONORUM - Architectura Budownictwo

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Celem pracy było stworzenie modelu optymalizacji czasowo-kosztowej, przydatnego w planowaniu realizacji inwestycji wieloobiektowych. W modelu uwzględniono koszty bezpośrednie wykonania prac, koszty pośrednie, koszty przestojów brygad roboczych, kary za niedotrzymanie terminów dyrektywnych poszczególnych obiektów. W celu minimalizacji kosztów zastosowano programowanie liniowe. Weryfikacja działania opracowanego modelu została przeprowadzona z wykorzystaniem stworzonego oprogramowania na przykładzie obliczeniowym dla inwestycji wieloobiektowej. Model w przyszłości można rozszerzyć o optymalizację kolejności wykonywanych obiektów.

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“…One of the effective ways to reduce the project duration is the project crashing [6]. The duration of a project can be shortened by accelerating the normal critical activities' durations with minimum additional cost by allocating more or efficient resources (labor, equipment or materials), working multiple shifts, and extending working days [7][8][9][10][11][12]. Implementation of these strategies increases the direct costs associated with such activities, but also decreases total indirect costs by reducing the project duration [7].…”

Section: Introductionmentioning

confidence: 99%

Project Crashing with Crash Duration Consumption Rate: An Illustrative Example

Turkoglu¹,

Polat²,

Damcı³

et al. 2020

Proceedings of the Creative Construction E-Conference 2020

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Completing on time, within the estimated budget and at the desired quality are three main constraints of construction projects. However, construction projects become nowadays more complex than ever, so they are subjected to uncertainties and changes throughout the project life cycles. These uncertainties and changes may lead to severe delays in project duration. Therefore, project managers desire to reduce the project duration without changing scope of the project. Crashing a project is an advanced project management strategy, which aims to achieve the maximum reduction in project duration with the minimum additional cost without changing the scope. However, project crashing is a difficult task and should be used if it is necessarily needed. This paper proposes a model that considers crash duration consumption rates of activities for solving the project crashing problem. The crash duration consumption rate is the percentage that is set to determine the maximum amount of crash duration that an activity can consume with safety margin. The proposed model enables the schedulers to assign crash duration consumption rates to each activity that can be used during the project crashing procedure. Having applied the proposed model, the Monte Carlo simulation is also performed to determine the probability of completion of the project at the latest in crashed project duration. The applicability of the proposed model is presented along with an illustrative example. The proposed model is supposed to minimize the likelihood of delays, while maintaining schedule flexibility. In addition, the proposed model provides schedulers a new perspective in solving project crashing problems.

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Genetic algorithm for project time-cost optimization in fuzzy environment

Cited by 16 publications

References 20 publications

Modelling Building Renovation Using PERT

Modelling Building Renovation Using PERT

Untitled

Project Crashing with Crash Duration Consumption Rate: An Illustrative Example

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