EVALUATING SURROGATE MEASURES OF CONSTRUCTION PROJECT SCHEDULE ROBUSTNESS

Piotr JASKOWSKİ; Slawomir BİRUK; Agata CZARNİGOWSKA

Makale detayları

EVALUATING SURROGATE MEASURES OF CONSTRUCTION PROJECT SCHEDULE ROBUSTNESS

Yazarlar:

Piotr JASKOWSKİ | Slawomir BİRUK | Agata CZARNİGOWSKA

Yayıncı:

Sosyal Bilimler Araştırmaları Derneği

Dergi:

International Journal of Business and Management Studies 2011 Vol.3 Issue 2, pp.263-272

Belge Tipi:

Makale

Yayın Tarihi:

11/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000809564

Sıklık:

İki Yıllık

eISSN:

1309-8047

Özet:

 

Projects are subject to various uncertainties that have negative effect on activity
 durations. This is most apparent in the case of construction projects. The actual
 completion time of construction projects is reported to be rarely in accordance
 with initial plans. A schedule considered optimal with respect to project duration
 may become infeasible due to disruptions caused by uncontrollable factors.
 Deficiencies of the existing methods of project scheduling gave rise to the
 worldwide search for predictive (or proactive) scheduling that is expected to
 provide robust schedules (immune to disturbances), thus counteracting instability
 and “nervousness” of a project plan.
 The baseline schedule (execution plan prepared prior to the project execution) is
 to be reliable in terms of not only the total project makespan, but also timing of
 particular tasks and activities – related with resource management. The main
 reason for the planner’s insisting on stable baseline schedules is the necessity of
 “advance booking” of key staff or equipment (to guarantee their availability) and
 keeping fixed delivery dates (as required by suppliers or subcontractors). 
 A stable schedule with acceptable makespan performance should minimize the
 instability cost function, defined as the weighted sum of the expected absolute
 deviations between the predicted start times and the value that the random
 variable of start time will assume during schedule execution. Computational
 burden of optimizing this direct measure of schedule robustness in a real-life
 project environment is quite high. Developing surrogate quantitative measures to
 provide a good estimate of schedule robustness is essential for building efficient
 robust scheduling algorithms. For this reasons, the aim of this paper is to
 evaluate the quality of free-slack-based measures for a benchmark project. The
 new approach to increasing schedule robustness, based on buffer sizing and
 allocation, is proposed and tested against the existing free-slack times relocation
 approaches.

Makale detayları

EVALUATING SURROGATE MEASURES OF CONSTRUCTION PROJECT SCHEDULE ROBUSTNESS

Yazarlar: Piotr JASKOWSKİ | Slawomir BİRUK | Agata CZARNİGOWSKA

Yayıncı: Sosyal Bilimler Araştırmaları Derneği

Dergi: International Journal of Business and Management Studies 2011 Vol.3 Issue 2, pp.263-272

Belge Tipi: Makale

Yayın Tarihi: 11/2011

Belge Dili: Türkçe

Document ID (Org No.): 2000809564

Sıklık: İki Yıllık

eISSN: 1309-8047

Sayı

Yazarlar:

Piotr JASKOWSKİ | Slawomir BİRUK | Agata CZARNİGOWSKA

Yayıncı:

Sosyal Bilimler Araştırmaları Derneği

Dergi:

International Journal of Business and Management Studies 2011 Vol.3 Issue 2, pp.263-272

Belge Tipi:

Makale

Yayın Tarihi:

11/2011

Belge Dili:

Türkçe

Document ID (Org No.):

2000809564

Sıklık:

İki Yıllık

eISSN:

1309-8047