A Fuzzy Method Determination of Time Buffer Size in Critical Chain Project Management

Marek-Kołodziej, Katarzyna; Łapuńka, Iwona

doi:10.2139/ssrn.4186306

Cited by 1 publication

(2 citation statements)

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“…The equipment utilization rate is ND = NG = 0.95. The process durations are TD = 4.33 d, TG = 5.18 d. According to Equations (19)(20)(21)(22), the average speed of the relay network of this project is v = 2.02, vD = 1.12, vG = 1.99. From " v > vG > vD, TG > TD, TG + ( v − vG)TG/vG < TD + (v − vD)TD/vD" yields PD = −0.41, PG = −0.41.…”

Section: Calculation Of Process Relay Potentialmentioning

confidence: 99%

“…Zohrehvandi et al [17,18] introduced the Fuzzy Overlapping Buffer Management Algorithm to determine the size of the project buffer and dynamically control the consumption of the buffer. Marek and Katarzyna [19] applied normal distribution functions and fuzzy number theory to calculate the buffer size, which increased the chances of project execution. Lin et al [20] quantified the uncertainty of each process based on the entropy weight method, and obtained the uncertainty coefficient of each process.…”

Section: Introductionmentioning

confidence: 99%

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Research on Buffer Calculation Model of Critical Chain Based on Adjacency Information Entropy

Nie

et al. 2023

Buildings

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In project network planning, the correlation complexity of the processes is not only related to the immediately preceding and following processes, but also closely related to indirect adjacent processes. In the existing relevant studies, many scholars have considered the influence of direct adjacent processes but ignored the influence of indirect adjacent processes. In addition, the three-point time estimation method and Monte Carlo simulation are mostly used in the current research for the estimation of process duration, while less research exists on the estimation of process optimal duration under multi-objective constraints. Therefore, this paper proposes a buffer calculation model of critical chain based on adjacency information entropy. This methodology provides comprehensive consideration of the relationship between cost, quality, safety, environment and process duration, the influence of process’s resource demand intensity, resource constraints and process duration on the buffer size, the influence of the relay potential of mutual cooperation and cross construction between processes, as well as the influence of adjacent complexity of processes on the project construction schedule. The calculation example analysis shows that this method can improve the accuracy of the calculation of process safety time, reduce the influence of the complexity of process adjacency correlation on the project construction schedule, reasonably control the buffer size, and effectively shorten the planned project duration.

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Section: Calculation Of Process Relay Potentialmentioning

confidence: 99%