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Abstract
Potential applications of the CCS/BM method in the scheduling of continuous LSM (Linear Scheduling Model) construction activities are considered. The effect of time buffers – feeding buffers (FB) and project buffers (PB) – on total project realisation time (TT) is examined. Feeding buffers are found to have no direct full influence on TT if construction activities continuity is assumed. The influence of FBs on TT for other conditions considered in this paper still needs to be examined.
Highlights
This paper deals with construction work scheduling
The scheduling of linear continuous construction process operations has been the subject of numerous papers: Arditi et al (2001a, 2001b), Hegazy et al (1993), Johnston (1984), in which graphical planning techniques are described
The above analysis and computations have shown that the reduction of the duration of individual activities, taking into account 25 % time buffers, does not result in a proportionally shorter total project time
Summary
This paper deals with construction work scheduling. Current publications on this subject propose such scheduling methods as: LSM (Linear Scheduling Model), LOB (Line of Balance) and CPM/PERT network planning for several objective functions: the least cost, limited resources, work priorities etc in both a deterministic approach and probabilistic one. The present paper deals with the planning of tasks when time buffers are included and the continuity of construction process operations is maintained. When negotiating dates for completing tasks, contractors try to make sure that they will be able to meet the contractual deadlines They do it intuitively by introducing time reserves (buffers), taking both their subcontractors and suppliers into account. Because of different size and execution time of the tasks involved (earth work, foundation work, construction work, finishing work etc), the assurance of their continuity may result in stoppages for the companies carrying them out as they wait for the completion of the works. Changes in the sequence in which works are carried out in many sectors contribute to an increase/decrease in the fixed project time Matrix notation makes it easier to enter data when schedules are drawn up by computers. Matrix models of construction projects can be used to compute schedule parameters
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