A DSM-Based CCPM-MPL Representation Method for Project Scheduling under Rework Scenarios

Table 1

Buffer calculation methods.

Method	Buffer calculation
C&PM [35]
RSEM [36]	represents the duration with 90% completion probability; represents the duration with 50% completion probability
APRT [30]	represents resource requirements of i for q; represents the level of resource acquisition of q; represents the sum of duration variance of activity in the critical chain
APD [30]	represents the number of activity relationships in the chain; represents the number of activities in the network
Buffer calculation considering resource tightness [37]	represents the physical resource tightness; represents the information resource tightness; represents the standard deviation of activities
Buffer calculation considering resource tightness, network complexity, and risk coefficient [31]	represents the buffer adjustment coefficient in the 5% risk level; represents the membership function of resource tightness; represents the coefficient of the network schedule
Buffer calculation considering project rework [8]	represents the safety duration of the activity; represents the safety time of rework