by Jeffrey C Kadlowec, Registered Architect The vast number of project elements and complex interdependencies between building systems necessitate prioritization of construction activities. The critical path method (CPM) and project evaluation and review technique (PERT) were developed to quantify the importance of project tasks. Schedule-based indexes further investigate the relative importance of tasks to determine probability and the degree of uncertainty [Zarghami 2022]. These include criticality index (CI), significant index (SI), cruciality index (CRI), uncertainty importance measure (UIM), and schedule sensitivity index (SSI) as shown in Table 1. Table 1. Defining schedule-based indexes [Zarghami 2022]. Utilizing several forms of construction.
