Authors : Uswege Jacob Mwaipungu; Dr. Kimata Malekela; Dr. Rehema Monko

Volume/Issue : Volume 10 - 2025, Issue 2 - February

Google Scholar : https://tinyurl.com/34dc2x2k

Scribd : https://tinyurl.com/4u76ha3e

DOI : https://doi.org/10.5281/zenodo.14891402

Abstract : This study examines the strength of the relationship among constraining factors impacting Design-Bid-Build (DBB) project delivery. Data collection involved a structured questionnaire survey with 124 valid responses. Using Pearson correlation analysis revealed strong interdependencies among these factors, particularly between contractor-related factors (CRF) and project external-related factors (PERF) (0.855), design-related factors (DRF) and owner-related factors (ORF) (0.839), DRF and design documentation-related factors (DDRF) (0.821), CRF and project collaboration-related factors (PCRF) (0.815), DRF and PCRF (0.811), PCRF and PERF (0.808), DRF and CRF (0.803), PCRF and ORF (0.797), DDRF and ORF (0.793), DRF and PERF (0.759), CRF and DDRF (0.737), ORF and CRF (0.733), PCRF and DDRF (0.723).This suggests that effective collaboration is integral to managing these critical project components. All correlations are statistically significant with a p-value of <0.001, indicating robust linear relationships between these factors. The study underscores the importance of effective collaboration between project stakeholders to address challenges related to design documentation, contractor involvement, and external conditions. Furthermore, issues related to design documentation (DDRF) and consultant-related factors (DRF) significantly influence project outcomes by affecting owners and contractors' performance. The findings indicate that the interconnectedness of these constraining factors plays a critical role in DBB project success, emphasizing the need for proactive management, communication, and collaboration throughout the project lifecycle. The study recommends for improving design documentation quality, enhancing stakeholder collaboration, and implementing comprehensive risk management strategies.

Keywords : Constraining Factors, DBB, Correlation, Scatter Plot.

References :

1. Agbaxode, P.D.K., Saghatforoush, E. and Dlamini, S. (2020) ‘Integrated Project Delivery (IPD): Projecting
2. a Common Good to Key Participants and the Project’, in Proceedings of the 36th Annual ARCOM Conference, 7-8 September 2020. Association of Researchers in Construction Management, UK: In: Scott, L and Neilson, C J (Eds), pp. 136–145.
3. Agbaxode, P., Dlamini, S., & Saghatforoush, E. (2021). Design documentation quality influential variables in the construction sector. Paper presented at the IOP Conference Series: Earth and Environmental Science.
4. Agbaxode, P.D.K., Dlamini, S. and Saghatforoush, E. (2021b) ‘Quality of Design Documentation in the Construction Industry: A Review Using Meta-Synthesis Approach’, International Journal of Innovation and Technology Management, p. 2130003.
5. Ahmed, S. M., Azhar, S., Castillo, M., & Kappagantula, P. (2002). Construction delays in Florida: An empirical study. Final report. Department of Community Affairs, Florida, US.
6. Akampurira, E., & Windapo, A. (2018). Factors influencing the quality of design documentation on South African civil engineering projects. Journal of the South African institution of civil engineering, 60(3), 41-48.
7. Akoglu, H. (2018). User's guide to correlation coefficients. Turkish Journal of Emergency Medicine, 18(1), 91-93.
8. Alinaitwe, H., Apolot, R., & Tindiwensi, D. (2013). Investigation into the causes of delays and cost overruns in Uganda's public sector construction projects. Journal of Construction in Developing Countries, 18(2), 33.
9. Al-Momani, A. (2000). Construction delay: A quantitative analysis, International Journal of Project Management. Vol. 18, Issue No. 1, pp 51-59.
10. Alofi, A., Kashiwagi, J., Kashiwagi, D., & Sullivan, K. (2016). An Analysis of the Current Procurement System in Saudi Arabia. 52nd ASC Annual International Conference Proceeding, 2011.
11. Ameyaw, C. and Oteng-Seifah, S., (2010). ‘Construction Project Delivery in Ghana: The Performance Of The Traditional Procurement Method’. In West Africa Built Environment Research (Waber) Conference P. 255.
12. Anana, W. G. (2021). Ethical Practices and Contract Management in Ministry of Finance, Budget and National Planning (Nigeria). Kampala International University.
13. Arantes, A., & Ferreira, L. M. D. (2020). Underlying causes and mitigation measures of delays in construction projects: An empirical study. Journal of Financial Management of Property and Construction, 25(2), 165-181.
14. Assaf, S. A., & Al-Hejji, S. (2006). Causes of delay in large construction projects. International Journal of Project Management, 24(4), 349-357.
15. Baloyi, M. and Agumba, J.N. (2014) ‘Causes of disputes in construction projects in South case of Gauteng province’, in. University of the Witwatersrand, Johannesburg, South Africa: Proceedings 8th Construction Industry Development Board (CIDB) Postgraduate …, pp. 179–187
16. Bonett, D. G., & Wright, T. A. (2015). Cronbach's alpha reliability: Interval estimation, hypothesis testing, and sample size planning. Journal of organizational behavior, 36(1), 3-15.
17. Buamah, S. K. A. (2021). Effects of delays in completion of health facilities for local communities: A case of the Ningo Prampram District.
18. Buertey, J. I. T., Amofa, D., & Atsrim, F. (2016). Stakeholder management on construction projects: A key indicator for project success. American Journal of Civil Engineering, 4(4), 117-126.
19. Buertey, J. I. T., Offei, S. W., Kumi, T. A., & Atsrim, F. (2018). Effect of aggregates minerology on the strength of concrete: Case study of three selected quarry products in Ghana. Journal of Civil Engineering and Construction Technology, 9(1), 1-10.
20. Calahorra-Jimenez, M., Alarcón, L. F., Torres-Machi, C., Chamorro, A., & Molenaar, K. (2020). Improving cost performance in design-bid-build road projects by mapping the reasons for cost overruns into the project phases. Revista de la construcción, 19(2), 334-345.
21. Chan, D. W. and Kumaraswamy, M. M. (1997). A comparative study of causes of time overruns in Hong Kong construction projects, International Journal of Project Management, Vol. 15, No. 1 pp 55-63. Accessed on 14/7/2015 from http://www.sciencedirect.com/science/article/pii/.
22. Chan, Y. H. (2003). Biostatistics 104: correlational analysis. Singapore Med J, 44(12), 614-619.
23. Chileshe, N., & John Kikwasi, G. (2014). Critical success factors for implementation of risk assessment and management practices within the Tanzanian construction industry. Engineering, Construction and Architectural Management, 21(3), 291-319.
24. CMAA (2012) ‘An owner’s guide to project delivery methods’, CMAA (Construction Management Association of America) McLean, VA [Preprint], (Advancing Professional Construction and Program Management Worldwide).
25. Creswell, J.W. and Creswell, J.D. (2017) Research design: Qualitative, quantitative, and mixed methods approaches. Sage publications. 88. Marketing, 77(4), pp. 1–16.
26. Dancey, C. P. (2007). Statistics without maths for psychology. Prentice Hall.
27. Dada, M.O. (2013) ‘Client and Consultant Organisations’ assessment of Design-Bid-Build Procurement Practice In Nigeria’, Journal of Building Performance, 4(1).
28. Dargham, S. A., M. BouHatoum, M. Tohme,and F. Hamzeh. 2019. “Implementation of IntegratedProject Delivery in Lebanon: Overcoming the Challenges.” In: Proc., 27th Conf. of the Intern. Group for Lean Constr., 917-928. Dublin, Ireland: International Group for Lean Construction.
29. Doloi, H., Sawhney, A., & Iyer, K. C. (2012). Structural equation model for investigating factors affecting delay in Indian construction projects. Construction Management and Economics, 30(10), 869-884.
30. Donaldson, L. (2006). The contingency theory of organizational design: challenges and opportunities. Organization Design: The evolving state-of-the-art, 19-40.
31. Dosumu, O., & Aigbavboa, C. (2018). An assessment of the causes, cost effects and solutions to design-errorinduced variations on selected building projects in Nigeria. Acta Structilia, 25(1), 40-70.
32. Dosumu, O., Idoro, G., & Onukwube, H. (2017). Causes of errors in construction contract documents in Southwestern, Nigeria. Journal of Construction Business and Management, 1(2), 11-23.
33. Easterbrook, S., Singer, J., Storey, M. A., & Damian, D. (2008). Selecting empirical methods for software engineering research. Guide to advanced empirical software engineering, 285-311.
34. El Sawalhi, N. I., & El Agha, O. (2017). Multi-attribute utility theory for selecting an appropriate procurement method in the construction projects. Journal of Construction in Developing Countries, 22(1), 75-96.
35. Evarist, C., Luvara, V. G., & Chileshe, N. (2023). Perception on constraining factors impacting recruitment and selection practices of building contractors in Dar Es Salaam, Tanzania. International Journal of Construction Management, 23(12), 2012-2023.
36. Fatawu, A. (2016). Assessing the quality of design and contract documentation and its impact on construction projects performance in Northern Ghana (Doctoral dissertation).
37. Fish, A. (2011) ‘Integrated Project Delivery: The Obstacles of Implementation’, p. 60.
38. Gadisa, B., & Zhou, H. (2021). Exploring influential factors leading to the poor performance of public construction project in Ethiopia using structural equation modelling. Engineering, Construction and Architectural Management, 28(6), 1683-1712.
39. Gamil, Y., & Abd Rahman, I. (2023). Studying the relationship between causes and effects of poor communication in construction projects using PLS-SEM approach. Journal of Facilities Management, 21(1), 102-148.
40. Habibi, M., Kermanshachi, S., & Rouhanizadeh, B. (2019). Identifying and measuring engineering, procurement, and construction (EPC) key performance indicators and management strategies. Infrastructures, 4(2), 14.
41. Hanák, T., Drozdová, A., & Marović, I. (2021). Bidding strategy in construction public procurement: A contractor’s perspective. Buildings, 11(2), 47.
42. Heidemann, A. & Gehbauer, F. 2010, “Cooperative Project Delivery in an Environment of Strict Design-Bid-Build Tender Regulations”. In:, Walsh, K. & Alves, T., 18th Annual Conf. of the International Group for Lean Const. Haifa, Israel, pp 581-587.
43. Hinton, M. A., & Hamilton, R. T. (2015). Competitive tendering and individual behaviour in the construction industry: convenient immorality at work. Construction management and economics, 33(11-12), 880-889.
44. Hwang, B.-G., Shan, M., & Lye, J.-M. (2018). Adoption of sustainable construction for small contractors: major barriers and best solutions. Clean Technologies and Environmental Policy, 20, 2223-2237.
45. Ikediashi, D. I., Ogunlana, S. O., & Alotaibi, A. (2014). Analysis of project failure factors for infrastructure projects in Saudi Arabia: A multivariate approach. Journal of Construction in Developing Countries, 19(1).
46. Israel, B., Mchopa, A., Mwaiseje, S., & Mashene, A. (2021). Ethical procurement practices and performance of public procuring entities in Tanzania: empirical evidences from Moshi district council. Journal of Co-operative and Business Studies (JCBS), 4(2)
47. Issa, A.I. (2023). Exploring the causes of delay in road construction projects in Tanzania: An interpretive structural modeling approach. Unpublished Master Dissertation, Ardhi University.
48. Jaafar, M., & Radzi, N. M. (2013). Level of satisfaction and issues with procurement systems used in the Malaysian public sector. Australasian Journal of Construction Economics and Building, The, 13(1), 50-65.
49. Jarkas, A. M. (2014). Factors impacting design documents quality of construction projects. International Journal of Design Engineering, 5(4), 323-343.
50. Jarkas, A. M., & Bitar, C. G. (2012). Factors affecting construction labor productivity in Kuwait. Journal of Construction Engineering and Management, 138(7), 811-820.
51. Jimoh, R. A., Oyewobi, L. O., Adamu, A. N., & Bajere, P. A. (2016). Women professionals’ participation in the nigerian construction industry: finding voice for the voiceless. Organization, technology & management in construction: an international journal, 8(1), 1429-1436.
52. Julião, M. L. (2018). Guidelines for scope of work in corporate office building design. Universidade de São Paulo.
53. Kamar, M. and Anuar, K. (2011) ‘Critical success factors to industrialised building system(IBS) contractor’.
54. Kamaruddeen, A. M., Sung, C. F., & Wahi, W. (2020). A study on factors causing cost overrun of construction projects in Sarawak, Malaysia. Labour (human), 2(7), 13.
55. Kavishe, N., & Chileshe, N. (2017, September). Joint venture housing projects in Dar Es Salaam City: An analysis of challenges and effectiveness. In Proceeding of the 33rd Annual ARCOM Conference (Vol. 4, p. 6).
56. Kavishe, N., Jefferson, I., & Chileshe, N. (2018). An analysis of the delivery challenges influencing public-private partnership in housing projects: The case of Tanzania. Engineering, Construction and Architectural Management, 25(2), 202-240.
57. Kavishe, N., & Chileshe, N. (2018). Identifying project management practices and principles for Public–Private partnerships in housing projects: The case of Tanzania. Sustainability, 10(12), 4609.
58. Kavishe, N. (2018). Risks associated with public private partnership (PPP) housing projects delivery in Tanzania. International Journal of Construction Engineering and Management, 7(2), 81-87.
59. Kavishe, N., & Chileshe, N. (2019). Critical success factors in public-private partnerships (PPPs) on affordable housing schemes delivery in Tanzania: A qualitative study. Journal of facilities management, 17(2), 188-207.
60. Kehinde, F. J., Atanda, A. O. (2022). Stakeholder’s Perception of Critical Success Factors for Design-Bid-Build Highway Projects in Nigeria.
61. Kihamba, J. S. (2021). Public procurement reforms in Tanzania: dispersion of corruption and governance. Public Procurement, Corruption and the Crisis of Governance in Africa, 185-204.
62. Kikwasi, G. (2012). Causes and effects of delays and disruptions in construction projects in Tanzania. Paper presented at the Australasian Journal of Construction Economics and Building-Conference Series.
63. Kikwasi, G. J., & Escalante, C. (2018). Role of the construction sector and key bottlenecks to supply response in Tanzania (9292565737).
64. Kortenko, S., Koskela, L., Tzortzopoulos, P., & Haghsheno, S. (2020). Negative effects of design-bid-build procurement on construction projects. Paper presented at the Proc. 28th Annual Conference of the International Group for Lean Construction (IGLC28), Berkeley, California, USA, doi. org/10.24928/2020/0141.
65. Kothari, C. R. (2004). Research methodology: Methods and techniques: New Age International.
66. Konzo, A. (2020). An assessment of the causes for delay in completion of road construction projects in Tanzania. MSC Dissertation, Mzumbe University.
67. Kyalo, J. K., & Muturi, W. (2015). Factors Affecting Completion of Government Funded Projects, a Survey of Projects in the Ministry of Water and Environment. Journal of Economics and Sustainable Development, 6(8), 177184.
68. Lappalainen, E. et al. (2022) ‘Improving Design Quality by Contractor Involvement: An Empirical Study on Effects’, Buildings, 12(8), p. 1188.
69. Lines, B. C., Kakarapalli, R., & Nguyen, P. H. (2022). Does best value procurement cost more than low-bid? A total project cost perspective. International Journal of Construction Education and Research, 18(1), 85-100.
70. Love, P. E., Sing, M. C., Ika, L. A., & Newton, S. (2019). The cost performance of transportation projects: The fallacy of the Planning Fallacy account. Transportation Research Part A: Policy and Practice, 122, 1-20.
71. Luvara, V. (2020). Development of social capital model for organization performance of building contractors in Tanzania. Unpublished Ph. D. Thesis Ardhi University.
72. Luvara, V. G. M., & Benjamin, M. (2024). Unveiling factors influencing the duration of arbitration practice in the Tanzania construction industry. International Journal of Building Pathology and Adaptation.
73. Maagi, B., & Mwakalobo, A. (2023). Users’ perception regarding the effect of E-Procurement practice on customer satisfaction in public procurement in Tanzania. Open Journal of Business and Management, 11(2), 570-584.
74. Malekela, K. N. (2018). Risk Measures for Controlling Variations on Forecasted Construction Cash Flows of Building Projects. Risk, 5(05).
75. Malekela, K. N., Mohamed, J., Ntiyakunze, S. K., & Mgwatu, M. I. (2017). Risk factors causing variations on forecasted construction cash flows of building projects in Dar es Salaam, Tanzania. Int. J. Constr. Eng. Manag, 2, 46-55.
76. Malekela. (2019). Development of a model for optimising the variations on the forecasted constructed construction cashflows: a case of building projects in Dar es salaam-Tanzania. Unpublished Ph. D. Thesis University of Dar es Salaam.
77. Malinda, M. J. K. (2017). Quality of project documentation as a major risk source in infrastructure projects in South Africa. Stellenbosch: Stellenbosch University.
78. Marshall, E. (no date). The Statistics Tutor’s Quick Guide to Commonly Used Statistical Tests. Sheffield: University of Sheffield.
79. Mathonsi, M. D., & Thwala, W. D. (2012). Factors influencing the selection of procurement systems in the South African construction industry. African Journal of Business Management, 6(10), 3583.
80. Matto, M. C., Ame, A. M., & Nsimbila, P. M. (2021). Influence of contract management on value for money procurement in Tanzania. International Journal of Procurement Management, 14(6), 724-741.
81. Mchopa, A. D., Changalima, I. A., Sulle, G. R., & Msofe, R. M. (2024). Public procurement trajectories in Tanzania: a review of reforms, practices, and compliance. Cogent Business & Management, 11(1), 2300498.
82. Mesa, H.A., Molenaar, K.R. and Alarcón, L.F. (2016) ‘Exploring performance of the integrated project delivery process on complex building projects’, International Journal of Project Management, 34(7), pp. 1089–1101.
83. Morledge, R., & Smith, A. (2013). Public sector projects. Teoksessa: Building.
84. Monko, R. J. (2015). Interorganizational Collaboration and Systemic Change Framework for Building Information Modeling (BIM) Adoption: Louisiana State University and Agricultural & Mechanical College.
85. Mosley, J. C., & Bubshait, A. A. (2021). Investigative study of project procurement methods and project performance indicators in Saudi Arabia. International journal of construction management, 21(8), 845-857.
86. Mushumbusi, M. Z. (2011). Formal and informal practices for affordable urban housing: case study: Dar es Salaam, Tanzania. KTH Royal Institute of Technology.
87. Mwaipungu, U, Malekela,N&Monko, R. (2025). The Identification of Constraining Factors Impacting Design Bid Build Project Delivery in Tanzania Construction Industry. International Journal of Innovative Science and Research Technology, 10(1), 919–933.
88. Naor, M., Bernardes, E. S., & Coman, A. (2013). Theory of constraints: is it a theory and a good one?. International Journal of Production Research, 51(2), 542-554.
89. Naoum, S., & Egbu, C. (2015). Critical review of procurement method research in construction journals. Procedia Economics and Finance, 21, 6-13.
90. Nawi, M., Lee, A. and Nor, K. (2011) ‘Barriers to implementation of the industrialised building system (IBS) in Malaysia’, The Built & Human Environment Review, 4(1), pp.   22–35.
91. Nguyen, Q. V., Miller, N., Arness, D., Huang, W., Huang, M. L., & Simoff, S. (2020). Evaluation on interactive visualization data with scatterplots. Visual Informatics, 4(4), 1-10.
92. Noor, S. N. A. M., Tobi, S. U. M., & Fathi, M. S. (2022) Revolutionizing Quantity Surveyors: Unleashing Competency In Construction 4.0–A Pilot Study In Malaysia. Malaysian Construction Research Journal (MCRJ), 210.
93. Noulmanee, A., Wachirathamrojn, J., Tantichattanont, P., & Sittivijan, P. (1999). Internal causes of delays in highway construction projects in Thailand. International Journal of Project Management, 17, 149-159.
94. Ntiyakunze, S.K. (2011). Conflicts in Building Projects in Tanzania:  Analysis of Causes and Management Approaches.  Department of Real Estate and Construction Management, Royal Institute of Technology, Stockholm, Sweden.
95. Odeyinka, H. A. and Yusuf, A. (1997) “Causes and effects of construction delays on completion cost of housing projects in Nigeria” Financial management property construction (2); 31-44.
96. Odeyinka, H. A., Lowe, J., & Kaka, A. (2008). An evaluation of risk factors impacting construction cash flow forecast. Journal of Financial Management of Property and Construction, 13(1), 5-17.
97. Ofori, G. (2012) Contemporary Issues in Construction in Developing Countries. 2 Park Square, Milton Park, Abingdon, Oxon OX14 4RN: Spon Press.
98. Ogunsanmi, O. (2013). Effects of procurement related factors on construction project performance in Nigeria. Ethiopian Journal of Environmental Studies and Management, 6(2), 215-222.
99. Okereke, R. A., Ihekweme, N. M., & Adegboyega, A. A. (2022). Impact of Traditional Procurement System on Construction Project Delivery. Journal Of Project Management Practice (JPMP), 2(2), 23-38.
100. Oladirin, O. T., Olatunji, S. O., & Hamza, B. T. (2013). Effect of selected procurement systems on building project performance in Nigeria. International journal of sustainable construction engineering and technology, 4(1), 48-62.
101. Olanike, O. Y., Baba, M. M., & Ahmad, A. B. (2020). Assessing The Influence of Procurement Systems OnPerformance of Construction Projects in Nigeria. FUW Trends in Science & Technology Journal, 5(3), 796-801.
102. Owiti, J. O. (2022). Effectiveness of Construction Contract Procurement Processes in Public Projects in Kenya: A Survey of County Government Projects (Doctoral dissertation, JKUAT-SABS).
103. Patil Harshal, M. Prof. Sarode GC (2017), Study of Correlation Factors of fabric Management in Building Construction Industry. International Journal of Latest Engineering and Management analysis (Ijlemr) Issn, 2455-4847.
104. Phoya, S. (2014). Multi-Stakeholders’ Participation in Health and Safety Risk Management in Construction Project in Tanzania (Doctoral dissertation, Ardhi University).
105. Pishdad-Bozorgi P, Garza J. M D L, Austin RB. 2016. Readiness Assessment for Flash Tracking. J Constr Eng Manag. 142(12):06016005.
106. Puri, D., & Tiwari, S. (2014). Evaluating the criteria for contractors’ selection and bid evaluation. International journal of engineering science invention, 3(7), 44-48.
107. Rahmani, F. (2021). Challenges and opportunities in adopting early contractor involvement (ECI): Client’s perception. Architectural engineering and design management, 17(1-2), 67-76.
108. Rahmani, F., Maqsood, T., & Khalfan, M. (2017). An overview of construction procurement methods in Australia. Engineering, construction and architectural management, 24(4), 593-609.
109. Ramabodu, M. S., & Verster, J. J. (2013). Factors that influence cost overruns in South African public sector mega-projects. International Journal of Project Organisation and Management 7, 5(1-2), 48-56.
110. Rashid, K. A., Fauzi, P. N. F. N. M., & Hasan, S. F. (2017). Shariah principles in the procurement of buildings and infrastructure works. Paper presented at the 4th International Conference on Masjid, Zakat and Waqf Management.
111. Reta, A., & Alyew, A. (2022). Determining the effects of awarding lowest bid price system on the construction projects of Ethiopian Southern Nation. Journal of University of Shanghai for Science and Technology, 24(1), 253-260.
112. Rowlinson, S., Walker, D.H.T. and Cheung, F.Y.K. (2008), “Culture and its impact upon project procurement”, in Walker, D.H.T. and Rowlinson, S. (Eds), Procurement Systems: A Cross Industry Project Management Perspective, Taylor and Francis, New York, NY
113. Rwakarehe, E. E., & Mfinanga, D. A. (2014). Effect of inadequate design on cost and time overrun of road construction projects in Tanzania. Journal of Construction Engineering and Project Management, 4(1), 15-28.
114. Salla, D. E. (2020). Comparing performance quality of design-bid-build (DBB) and design-build (DB) project delivery methods in Nigeria. Afr. J. Earth Environ. Sci, 2(2).
115. Sambasivan, M. and Soon, Y. W. (2007). Causes and effects of delays in Malaysian construction industry. International Journal of Project Management Vol. 25, pp. 517–526. Accessed from www.nosazimadares.ir/fanni/doclib/causes on 4/9/2012.
116. Saunders, M. N., & Townsend, K. (2018). Choosing participants. Sage handbook of qualitative business and management research methods, 480-494.
117. Sayidganiev, Z. S. U., Karimbaev, B. B. U., & Achilov, O. R. (2022). Advantages and disadvantages of construction industries. Academic research in educational sciences, 3(Special Issue 2), 123-127.
118. Schober, P., Boer, C., & Schwarte, L. A. (2018). Correlation Coefficients: Appropriate Use and Interpretation. Anesthesia & Analgesia, 26(5), 1763-1768.
119. Shoar, S. and Payan, S. (2021) ‘A qualitative system dynamics approach to modeling the causes and effects of design deficiencies in construction projects’, Journal of Facilities Management.
120. Simon, J. (2017). The Factors Causing Delays in road construction projects in Tanzania: A case of Tanroads, Dar es Salaam city. MSc Thesis, Open University of Tanzania.
121. Shrestha PP, O’Connor JT, Gibson EG. Jr. (2012). Performance comparison of large design build and design bid build highway projects. J Constr Eng Manage. 138(1):1–13. CO.1943-7862.0000390.
122. Suratkon, A., Yunus, R., & Deraman, R. (2020). Characteristics of Procurement Methods in Malaysia “Comparing Design-Bid-Build, Design-Build and Construction Management. International Journal of Sustainable Construction Engineering and Technology, 11(3), 1-11.
123. Ugwu, O. O., & Haupt, T. C. (2007). Key performance indicators and assessment methods for infrastructure sustainability—a South African construction industry perspective. Building and environment, 42(2), 665-680.
124. Valerian, W. (2014). Project procurement method and its relationship with disputes occurrence in tanzania construction industry. A Case of Construction Stakeholders in Dar es Salaam. Mzumbe University.
125. Walker, D., & Rowlinson, S. (2008). Procurement systems. Taylor & Francis, London.
126. Yasamis, F. Arditi, D. & Mohammadi, J., (2002). Assessing contractor quality performance. Construction Management & Economics, 20(3), 211-223.
127. Yu, A. T., & Shen, G. Q. (2013). Problems and solutions of requirements management for construction projects under the traditional procurement systems. Facilities, 31(5/6), 223-237.
128. Zainudin, N. A., Adnan, H., Baharuddin, H. E. A., Rosman, M. R., & Ismail, W. N. W. (2022). A comparative study on risk allocation for different procurement type in Malaysian industry. Paper presented at the IOP Conference Series: Earth and Environmental Science.
129. Zuber, S. Z. S., Nawi, N. M., & Nifa, F. A. A. (2019). Construction procurement practice: A review study of integrated project delivery (IPD) in the Malaysian construction projects. International Journal of Supply Chain Management, 8(1), 777-783.