Calculation of Buffer Size on Critical Chain Based on Duration Distribution, Multiresource Constraints, and Relay Potential

Table 4

Comparison of buffer size and project duration of each calculation method.

Name of methods	Factors considered in the method	FBG/day	FBF/day	FBH/day	PB/day	Project planning time/day
Cut and paste	Safety time of activity	1.5	1.5	1.5	7	31
Root variance method	Variance of activity	3	3	2	6.78	30.78
APRT method	Resource utilization	5.47	5.47	5.47	12.36	36.36
Huchen’s method	Project duration risks and multiple resource constraints	1.15	2.87	2.65	6.44	31.11
Method used in this paper	Project duration risks, multiple resource constraints, and relay potential	1	1.7	1.81	5.97	30.45