http://localhost/xmlui/handle/123456789/1283 Sun, 17 May 2026 00:15:37 GMT 2026-05-17T00:15:37Z http://localhost/xmlui/handle/123456789/6977 Comparative Study of Multi Prime and Single Prime Contracting Performance in Large Road Construction Project in Kenya Orango, Elijah Onyango This study explored the performance difference between Single-prime and Multi prime contracting methods in terms of cost, quality, timeliness, and overall xi performance as they are used in road construction in Nairobi City County. The study employed a comparative primary cross-sectional study with primary data collection using a semi-structured Likert-scaled questionnaire to collect data from professionals who have been involved in both contracting methods in roads construction in the County over the past 10 years. The study employed purposive and snowball sampling to select the professionals who were in active road construction projects in the county and professionals who had been involved in roads construction in Nairobi City County in the past ten years. The Study tool was tested for reliability and found to meet internal consistency requirements. The analysis of construction costs revealed a statistically significant difference between single prime and multi-prime (p = 0.006), suggesting that single prime projects costed slightly higher. The analysis also indicated no statistically significant difference in project timelines between the two contracting methods (U = 704.000, z = -1.208, p = 0.227). However, the higher mean rank for Multi-prime (45.79) compared to Single-prime (39.37) suggests longer time in Multi prime projects. A statistically significant difference was observed in the quality of project output between Single-prime and Multi-prime contracting methods (p = 0.002). The significantly higher mean rank for Single-prime (38.91) compared to Multi prime (46.46) (p=0002) indicates that Multi-prime contracting is associated with higher quality project outputs. The difference in overall contract performance between the two methods was statistically significant (p = 0.019). Notably, despite the seemingly lower quality output, Multi-prime contracting showed a slightly higher mean rank (45.87) compared to Single-prime (39.32) in overall performance. The result suggests that single-prime contracting may actually be associated with marginally higher costs, lower quality, but shorter completion time, 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 terms of cost and overall performance in large and complex road construction projects in Nairobi City County-Kenya Nairobi City County where a lot more technical expertise may be required. MS in Construction Engineering and Management Fri, 15 May 2026 00:00:00 GMT http://localhost/xmlui/handle/123456789/6977 2026-05-15T00:00:00Z http://localhost/xmlui/handle/123456789/6965 A Strategy for Effective Safety Management in Construction Sites in Nairobi County Wameyo, Elvis Shisya The construction industry in Nairobi County remains one of the most hazardous occupational sectors, with accident rates sustained by weak enforcement, informality, limited training, and fragmented organizational commitment. While global literature has advanced safety management frameworks, gaps persist in contextualizing these approaches to resource-constrained and informal construction environments. In particular, psychosocial, economic, and cultural dimensions remain underexplored, giving rise to this study. The research aimed to develop a strategy for effective safety management in construction sites in Nairobi by pursuing four objectives: (i) establish the current level of safety management, (ii) determine influencing factors, (iii) examine their interrelationships, and (iv) formulate a practical strategy. An explanatory sequential mixed-methods design was employed. The quantitative phase surveyed 100 contractors selected through stratified random sampling from 1,447 registered projects, generating ordinal data analyzed using descriptive statistics, Spearman’s rank correlation, and ordinal logistic regression. The qualitative phase, involving interviews and focus groups with regulators, managers, and workers, explained contextual dynamics. Integration of both phases ensured robust strategy formulation. Findings indicated that safety management in Nairobi is generally low to moderate. Larger firms adopt structured systems, but small and informal contractors rely on reactive practices. Key determinants included management commitment, worker training, regulatory enforcement, and PPE utilization, while economic constraints, psychosocial stressors, and weak digital adoption further undermined safety outcomes. The study concludes that Nairobi’s safety environment is transitional, requiring both stronger site-level practices and systemic organizational and policy reforms. Practically, the study recommends dual reforms: strengthening practices (training, PPE, hazard monitoring) while embedding systemic strategies (leadership accountability, inspections, digital tools, and policy integration). These reforms can reframe safety from a compliance burden into an investment in productivity and workforce wellbeing. Theoretically, the study extends accident causation, safety climate, and resilience frameworks to fragmented construction sectors. For future research, the study recommends a greater focus on psychosocial well-being and economic structures as integral dimensions of construction safety. Keywords: Construction, Safety Management, Nairobi, Strategy, Informality. MSc in Construction Project Management Tue, 10 Mar 2026 00:00:00 GMT http://localhost/xmlui/handle/123456789/6965 2026-03-10T00:00:00Z http://localhost/xmlui/handle/123456789/6964 A Strategy for Effective Safety Management in Construction Sites in Nairobi County Wameyo, Elvis Shisya The construction industry in Nairobi County remains one of the most hazardous occupational sectors, with accident rates sustained by weak enforcement, informality, limited training, and fragmented organizational commitment. While global literature has advanced safety management frameworks, gaps persist in contextualizing these approaches to resource-constrained and informal construction environments. In particular, psychosocial, economic, and cultural dimensions remain underexplored, giving rise to this study. The research aimed to develop a strategy for effective safety management in construction sites in Nairobi by pursuing four objectives: (i) establish the current level of safety management, (ii) determine influencing factors, (iii) examine their interrelationships, and (iv) formulate a practical strategy. An explanatory sequential mixed-methods design was employed. The quantitative phase surveyed 100 contractors selected through stratified random sampling from 1,447 registered projects, generating ordinal data analyzed using descriptive statistics, Spearman’s rank correlation, and ordinal logistic regression. The qualitative phase, involving interviews and focus groups with regulators, managers, and workers, explained contextual dynamics. Integration of both phases ensured robust strategy formulation. Findings indicated that safety management in Nairobi is generally low to moderate. Larger firms adopt structured systems, but small and informal contractors rely on reactive practices. Key determinants included management commitment, worker training, regulatory enforcement, and PPE utilization, while economic constraints, psychosocial stressors, and weak digital adoption further undermined safety outcomes. The study concludes that Nairobi’s safety environment is transitional, requiring both stronger site-level practices and systemic organizational and policy reforms. Practically, the study recommends dual reforms: strengthening practices (training, PPE, hazard monitoring) while embedding systemic strategies (leadership accountability, inspections, digital tools, and policy integration). These reforms can reframe safety from a compliance burden into an investment in productivity and workforce wellbeing. Theoretically, the study extends accident causation, safety climate, and resilience frameworks to fragmented construction sectors. For future research, the study recommends a greater focus on psychosocial well-being and economic structures as integral dimensions of construction safety. Keywords: Construction, Safety Management, Nairobi, Strategy, Informality. MSc in Construction Project Management Mon, 09 Mar 2026 00:00:00 GMT http://localhost/xmlui/handle/123456789/6964 2026-03-09T00:00:00Z http://localhost/xmlui/handle/123456789/6897 A Project Management Framework for Reducing Delays in Road Construction Projects in Rwanda Muhirwa, Marie Solange Road construction projects in Rwanda, particularly in Kigali City, consistently experience delays that negatively impact on economic development, public satisfaction, and urban mobility. This study developed a project management framework to reduce delays in road construction projects in Rwanda. The research objectives were to identify root causes of delays, assess their impacts, evaluate severity of the impacts from different stakeholders' perspectives, examine government influence on the delays, and formulate a management framework for mitigating the delays. A cross-sectional research design was employed, targeting registered engineers in the road construction sector of Rwanda. Data were collected from 43 professionals using structured questionnaires, representing a 71.67% response rate. Quantitative data were analyzed using descriptive statistics, while qualitative responses underwent thematic analysis. The study revealed that financial constraints constitute the primary delay factor, with contractor financing difficulties and government payment delays were the most critical. Land expropriation processes and utility relocations also significantly impact project timelines. Time overruns (95.3% of projects) and cost overruns (90.7% of projects) represent the most severe impacts, with additional consequences including traffic congestion, health issues from dust pollution, and economic disruption to local businesses. Government-related factors demonstrated the highest severity, primarily due to bureaucratic bottlenecks in payment processing and land acquisition procedures. The analysis revealed that 72.1% of projects experience payment delays, while 69.8% encounter expropriation-related setbacks. Based on these findings, a five-phase Phase-Gate Project Management (PG-PM) Framework was formulated, incorporating systematic checkpoints to address identified delay factors. The framework emphasizes early financial assessment, comprehensive feasibility studies, and rigorous design validation, with specific attention to land acquisition and utility coordination. The study recommends implementing the PG-PM Framework, establishing dedicated financing mechanisms including Public-Private Partnerships, streamlining expropriation procedures, and enhancing inter-agency coordination. These interventions could potentially reduce project delays by addressing the root causes that affect over 70% of road construction projects in Rwanda. Master of Science in Construction Project Management Mon, 16 Feb 2026 00:00:00 GMT http://localhost/xmlui/handle/123456789/6897 2026-02-16T00:00:00Z