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    Wyświetlanie 1-3 z 3
    Tytuł:
    Robust buffer allocation for scheduling of a project with predefined milestones
    Autorzy:
    Klimek, M.
    Łebkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/375929.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    resource-constrained project scheduling
    predictive-reactive scheduling
    robust buffer allocation
    milestones
    Opis:
    The paper discusses the problem of robust buffer allocation for Resource- Constrained Project Scheduling Problem (RCPSP) with predefined milestones(1) , for which execution deadlines have been established. To solve the problem, an algorithm is proposed supporting insertion of unit time buffers, with the simultaneous maximisation of new metrics of arrangement robustness. The presented results of experimental research speak for usability of the solutions proposed. The effectiveness is studied with use of test tasks(2) included in the Project Scheduling Problem Library (PSPLIB) with additionally specified project milestones.
    Źródło:
    Decision Making in Manufacturing and Services; 2009, 3, 1-2; 49-72
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Two-Phase Algorithm for a Resource Constrained Project Scheduling Problem with Discounted Cash Flows
    Autorzy:
    Klimek, M.
    Łebkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/375952.pdf
    Data publikacji:
    2013
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    resource-constrained project scheduling
    discounted cash flows
    milestones
    heuristics
    Opis:
    This paper presents a Resource-Constrained Project Scheduling Problem (RCPSP) settled by contractual milestones. The criterion analysed here is the maximisation of aggregate discounted cash flows from the contractor´s perspective, known as an RCPSP problem with Discounted Cash Flows (RCPSPDCF). The cash flows analysed here cover the contractor´s cash outflows (negative cash flows), related to the commencement of individual activities, and cash inflows (positive cash flows) after the fulfilment of individual milestones. The authors propose a two-phase algorithm for solving the problem defined. In the first phase, the simulated annealing metaheuristics is used, designed to identify a forward schedule with as high total DCF as possible. In the second phase, the best first-phase schedule is improved by right shifts of activities. To this end, the procedure which iteratively shifts tasks by one unit is applied, with a view to maximising the objective function. Activity shifts take into consideration precedence and resource constraints, and they are performed for a specified resource allocation to activities. This paper also includes an analysis of the problem for a sample project. The results of computational experiments are then analysed. The experiments were run with the use of standard test problems from the Project Scheduling Problem LIBrary (PSPLIB), with additionally defined cash flows and contractual milestones.
    Źródło:
    Decision Making in Manufacturing and Services; 2013, 7, 1-2; 51-68
    1896-8325
    2300-7087
    Pojawia się w:
    Decision Making in Manufacturing and Services
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heuristics for project scheduling with discounted cash flows optimisation
    Autorzy:
    Klimek, M.
    Łebkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/202107.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    resource-constrained project scheduling
    discounted cash flows
    milestones
    ograniczone zasoby planowania projektu
    przepływy pieniężne
    kamienie milowe
    Opis:
    The article presents the resource-constrained project scheduling problem with the maximisation of discounted cash flows from the contractor’s perspective: with cash outflows related to starting individual activities and with cash inflows for completing project stages (milestones). The authors propose algorithms for improving a forward active schedule by iterative one-unit right shifts of activities, taking into account different resource flow networks. To illustrate the algorithms and problem, a numerical example is presented. Finally, the algorithms are tested using standard test problems with additionally defined cash flows and contractual milestones.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 3; 613-622
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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