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| Main Authors: | , , |
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| Format: | Recurso digital |
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Zenodo
2024
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| Subjects: | |
| Online Access: | https://doi.org/10.5281/zenodo.18137318 |
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Table of Contents:
- This study explored the performance difference between Single prime contracting methods and Multi prime contracting methods in terms of Cost and overall performance (project's financial, timeliness, overall quality, compliance with Safety and utilization of resources) as they are used in roads construction in Nairobi City County. The study employed primary data collection using Semi-structured Likert-Scaled questionnaire to collect data from professional who have been in volved in both contracting, methods in roads construction in the County over the past 10 years. The study targeted a sample size of 385 out of which 267 respondents (69.4%) participated in the study. Purposive and snowball sampling methods were used to recruit and select the study participants. The Cronbach's alpha for contract cost overruns is 0.933, indicated excellent reliability of the tool used to collect the data. With a Cronbach's alpha of 0.615, overall contract performance demonstrated acceptable reliability. Inferential analysis of data collected revealed a statistically significant difference in construction costs between Single Prime and Multi prime contracting methods (U = 798.00, z = 0.326, p = 0.017). The mean rank was higher for Single Prime (42.71) compared to Multi prime (40.97), suggesting that Single Prime projects tend to have higher costs. The analysis of construction costs revealed a statistically significant difference between single prime (x̄ = 3.4286, σ = 0.53385) and multi-prime (x̄ = 3.3735, σ = 0.53785) contracting methods; t(81) = 0.461, p = 0.006. The mean difference of 0.05504 (95% CI: -0.18277 to 0.29285) indicates that single prime projects had slightly higher construction costs than multi-prime projects. The result suggests that single prime contracting may actually be associated with marginally higher costs, possibly due to the prime contractor's markup on subcontractor work. this study concludes that Multi primes preforms better than Single prime contracting methods in term of cost and overall performance in large and complex road construction projects in Nairobi City County-Kenya Nairoby City County where a lot more technical expertise may be required.