CHANGE ORDER RATIO ANALYSIS IN CONSTRUCTION PROJECTS: A STRATEGY FOR CONTINGENCY COST MANAGEMENT
DOI:
https://doi.org/10.35814/492f7h19Keywords:
Change Orders, Budget Ratio, Contingency Budget, Project ManagementAbstract
Change Orders (CO) represent a significant challenge in the construction industry, often leading to substantial adjustments in project budgets. COs, encompassing both scope additions and reductions, can result in discrepancies between initial budgets and final project costs, thus affecting project profitability and sustainability. To measure the impact of CO on budgets, this study employs the Change Order Ratio (COR) and its components: CORA (Change Order Ratio in Addition) for budget increases and CORS (Change Order Ratio in Subtraction) for budget reductions. This research analyzes data from 36 construction projects managed by PT XYZ in Indonesia from 2020 to 2024, with aims to (1) identify patterns in budget changes, (2) assess the statistical significance of CORA and CORS on COR, and (3) recommend contingency budgeting strategies. Findings reveal that both CORA and CORS have a significant impact on COR, with average values of 13.32% for CORA and 9.30% for CORS. Based on these findings, a contingency budget of 10-15% of the initial contract value is recommended. This study underscores the importance of effective CO management, particularly in anticipating scope additions, to maintain budget stability and enhance the accuracy of financial planning in construction projects.
References
Altaf, M., Musarat, M. A., Khan, A., Shoukat, Z., & Salahuddin, U. (2019). Change Order Impact on Construction Industry of Pakistan (pp. 391–402). https://doi.org/10.1007/978-3-030-32816-0_25
Arifin, M. F. A., & Liu, S. (2023). Cost and Time Control Analysis with Earned Value Method in the MRT-Hub Building Construction. Jurnal Teknik Sipil Dan Perencanaan, 25(1), 90–99. https://doi.org/10.15294/jtsp.v25i1.43043
Bakhshi, P., & Touran, A. (2014). An overview of budget contingency calculation methods in construction industry. Procedia Engineering, 85, 52–60. https://doi.org/10.1016/J.PROENG.2014.10.528
Gunduz, M., & Khan, O. H. (2018). Effective Framework for Change Order Management Using Analytical Hierarchy Process (AHP). Gazi University Journal of Science, 31(4), 1079–1091.
Hammad, M. W., Abbasi, A., & Ryan, M. J. (2016). Allocation and Management of Cost Contingency in Projects. Journal of Management in Engineering, 32(6), 4016014. https://doi.org/10.1061/(ASCE)ME.1943-5479.0000447
Hanna, A. S., Richard, C., A., P. P., & Min-Jae, L. (2004). Cumulative Effect of Project Changes for Electrical and Mechanical Construction. Journal of Construction Engineering and Management, 130(6), 762–771. https://doi.org/10.1061/(ASCE)0733-9364(2004)130:6(762)
Jungić, V. (2022). The Effect of Change-Order Management Factors on Construction Project Success: A Structural Equation Modeling Approach. Journal of the Construction Division and Management, 148(9). https://doi.org/10.1061/(asce)co.1943-7862.0002350
Khalafallah, A. (2019). Change Orders: Automating Comparative Data Analysis and Controlling Impacts in Public Projects. Journal of Construction Engineering and Management, 145(11). https://doi.org/10.1061/(ASCE)CO.1943-7862.0001700
Khalifa, W. M. A. (2019). Causes of Change Orders in Construction Projects. Engineering, Technology and Applied Science Research, 9(6), 4956–4961. https://doi.org/10.48084/etasr.3168
Moselhi, O. (2003). Estimating the cost of change orders. Cost Engineering, 45(8), 24–29.
Moselhi, O., Leonard, C., & Fazio, P. (1991). Impact of change orders on construction productivity. Canadian Journal of Civil Engineering, 18(3), 484–492. https://doi.org/10.1139/l91-059
Naji, H. I. (2018). Change orders in iraqi construction projects. Open Civil Engineering Journal, 12(1), 458–467. https://doi.org/10.2174/1874149501812010458
Naji, K. K., Gunduz, M., & Naser, A. F. (2022). Construction change order management project support system utilizing Delphi method. Journal of Civil Engineering …. https://journals.vilniustech.lt/index.php/JCEM/article/view/17203
Noaman, A. S., Hasan, A. E., & Talib, M. H. (2023). Methodology of Estimating Construction Projects Contingency. IOP Conference Series, 1129(1), 12044. https://doi.org/10.1088/1755-1315/1129/1/012044
Ojedokun, O., Odewumi, T. O., & Babalola, A. O. (2012). Cost Control Variables in Building Construction (A case study of Ibadan North Local Government, Oyo State, Nigeria). IOSR Journal of Mechanical and Civil Engineering, 4(1), 32–37. https://doi.org/10.9790/1684-0413237
Rajanubn, R., Lakawa, I., Hawa, S., Haryono, H., & Sufrianto, S. (2022). Faktor-Faktor yang Mempengaruhi Contract Change Order pada Pekerjaan Rehabilitasi Jalan Mataiwoi-Abuki. Sultra Civil Engineering Journal, 3(1), 9–17. https://doi.org/10.54297/sciej.v3i1.240
Rothwell, G. (2005). Cost contingency as the standard deviation of the cost estimate. Cost Engineering, 47(7), 22–25.
Serag, E., Oloufa, A. A., Malone, L. C., & Radwan, E. (2010). Model for Quantifying the Impact of Change Orders on Project Cost for U.S. Roadwork Construction. Journal of Construction Engineering and Management-Asce, 136(9), 1015–1027. https://doi.org/10.1061/(ASCE)CO.1943-7862.0000206
Shrestha, K. K., & Shrestha, P. P. (2016). A Contingency Cost Estimation System for Road Maintenance Contracts. Procedia Engineering, 145, 128–135. https://doi.org/10.1016/J.PROENG.2016.04.030
Touran, A. (2003). Calculation of contingency in construction projects. IEEE Transactions on Engineering Management, 50(2), 135–140. https://doi.org/10.1109/TEM.2003.810824
Traynor, B. A., & Mahmoodian, M. (2019). Time and cost contingency management using Monte Carlo simulation. Australian Journal of Civil Engineering, 17(1), 11–18. https://doi.org/10.1080/14488353.2019.1606499
Wardani, A. M. C., Laintarawan, I. P., & Arianta, I. G. (2023). Analisis faktor penyebab contract change order (cco) terhadap proses pelaksanaan pembangunan gedung rumah sakit kabupaten bangli. Widya Teknik, 19(1), 1–9. https://doi.org/10.32795/widyateknik.v19i1.4143
Waty, M. (2022). Impact of Change Orders on Road Construction Project: Consultans’ Perspective. Journal of Applied Engineering Science, 20(3), 736–744. https://doi.org/10.5937/jaes0-35894
Waty, M., & Sulistio, H. (2020). Perhitungan change order proyek jalan di banten. 4(2), 211. https://doi.org/10.24912/JMSTKIK.V4I2.6342
Waty, M., & Sulistio, H. (2021). Identifikasi risiko change order proyek konstruksi jalan. 5(1), 225–234. https://doi.org/10.24912/JMSTKIK.V5I1.10094
Zhang, Y., & Zhuang, S. Y. (2014). Study on the Cost Control of Construction Project. Applied Mechanics and Materials, 2351–2354. https://doi.org/10.4028/WWW.SCIENTIFIC.NET/AMM.638-640.2351
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