This study advances a project duration risk transmission model based on CCPM and the generalized project risk element transmission theory. By combining the calculation of systemic duration risk of a single process and the transmission of duration delay through an activity chain, this study proposes an modified method of calculating and setting input buffer and project buffer and also
... [Show full abstract] distinguishes the bottleneck activities on both the critical chain and non-critical chain, this method can offer a more reliable basis for making a project schedule plan and duration risk control.