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Golmohammadi, Amir-Mohammad, Shahabi, Ali, Shojaee, Mohsen, Hajizadeh Ebrahimi, Fazel, Abedsoltan, Hamidreza. (1404). Enhancing Project Schedule Monitoring: Application of CUSUM and EWMA Memory Control Charts in Earned Schedule Method. , 59(2), 241-255. doi: 10.22059/aie.2025.389599.1937
Amir-Mohammad Golmohammadi; Ali Shahabi; Mohsen Shojaee; Fazel Hajizadeh Ebrahimi; Hamidreza Abedsoltan. "Enhancing Project Schedule Monitoring: Application of CUSUM and EWMA Memory Control Charts in Earned Schedule Method". , 59, 2, 1404, 241-255. doi: 10.22059/aie.2025.389599.1937
Golmohammadi, Amir-Mohammad, Shahabi, Ali, Shojaee, Mohsen, Hajizadeh Ebrahimi, Fazel, Abedsoltan, Hamidreza. (1404). 'Enhancing Project Schedule Monitoring: Application of CUSUM and EWMA Memory Control Charts in Earned Schedule Method', , 59(2), pp. 241-255. doi: 10.22059/aie.2025.389599.1937
Golmohammadi, Amir-Mohammad, Shahabi, Ali, Shojaee, Mohsen, Hajizadeh Ebrahimi, Fazel, Abedsoltan, Hamidreza. Enhancing Project Schedule Monitoring: Application of CUSUM and EWMA Memory Control Charts in Earned Schedule Method. , 1404; 59(2): 241-255. doi: 10.22059/aie.2025.389599.1937

Enhancing Project Schedule Monitoring: Application of CUSUM and EWMA Memory Control Charts in Earned Schedule Method

Advances in Industrial Engineering
دوره 59، شماره 2، اسفند 2025، صفحه 241-255    اصل مقاله (942.86 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22059/aie.2025.389599.1937
نویسندگان
Amir-Mohammad Golmohammadi* 1؛ Ali Shahabi2؛ Mohsen Shojaee3؛ Fazel Hajizadeh Ebrahimi4؛ Hamidreza Abedsoltan5
1Associate Professor, Department of Industrial Engineering, Arak University, Arak, Iran.
2Assistant Professor, Department of Industrial Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran.
3Ph.D. Candidate, Department of Industrial Engineering, Iran University of Science & Technology, Tehran, Iran.
4Assistant Professor, Department of Industrial Engineering, Qom University of Technology, Qom, Iran.
5M.Sc., School of Industrial Engineering, College of Engineering, University of Tehran, Tehran, Iran.
چکیده
Earned Value Management ( ) and Earned Schedule ( ) are crucial tools for controlling projects and preventing deviations from schedule and budget objectives. In early-return projects, meeting deadlines is critical; however, Earned Value alone may not provide an appropriate criterion for evaluating and analyzing time-related indicators. This study proposes a method to use statistical control charts that consider indicator deviations from the project's start (memory charts) and are more sensitive to schedule deviations. Specifically, Exponentially Weighted Moving Average (EWMA) and Cumulative Sum (CUSUM) charts are employed to monitor the Schedule Performance Index ( ) based on the  system. Instead of Expected Value ( ),  is used for monitoring. Results demonstrate that both CUSUM and EWMA charts offer higher accuracy compared to classical Shewhart charts and produce fewer error alarms. The CUSUM chart shows less error (75% reduction in initial error alarms), while EWMA displays higher sensitivity (20% faster deviation detection). This proposed method can assist project managers in identifying schedule deviations more accurately and rapidly. The study utilized data from a 30-month construction project, applying normality tests and data transformation techniques to ensure statistical validity. The findings suggest that memory control charts based on  provide a more reliable and responsive approach to project schedule monitoring, particularly in time-sensitive projects.
کلیدواژه‌ها
Schedule Performance Index؛ Earned Schedule؛ Project Schedule Monitoring؛ Control Chart؛ CUSUM؛ EWMA
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