Bettemir, Onder Halis2026-04-042026-04-042024978-840963877-22695-5067https://hdl.handle.net/11616/10825928th International Congress on Project Management and Engineering, CIDIP 2024 -- 3 July 2024 through 4 July 2024 -- Jaen -- 204780In this study, schedule performance index is modified by introducing the workmanship requirements of the activities to the schedule performance computations. The modification entails definitions of workmanship requirements of the activities. The proposed approach is examined on two hypothetical projects. The first project is a high rise construction project and the latter is a multi-span bridge construction. Durations and workmanship requirements are assigned for each activity then the construction process is simulated by randomly generated numbers which may delay or fasten the execution of the activities. The network is scheduled by critical path method and the actual start and finish times of the activities are computed according to the activity durations. Schedule performance indexes of the examined projects are computed for each day of the construction by implementing the present approach and the proposed modification. The modification reduced the abrupt changes and removed the anomalies. The modification might help the project managers to apply more robust and effective control on the construction duration. © 2024 by the authors.eninfo:eu-repo/semantics/closedAccessearned valueproject managementschedule performance indexschedulingConference Object1201362-s2.0-85212920190Q4