The study was aimed at assessing the factors affecting project performance of the Kenya Ports Authority (Port of Mombasa). Specifically, the study investigated the main key issues that affect the project performance with emphasis being made on the parameters; Project Management Procurement Process, Project Management Competency, Project Management Structure and the Project Management Organization Structure. The study employed the use of structured an Semi- structured questionnaires to collect data from a target population of 720, where 10% of the population was drawn and analyzed.
Cronbach's alpha (α) and Factor analysis (KMO & Bartlett's Test of Sphericity) was used to determine the reliability and the validity of the research instrument respectively. The results showed that Procurement Process, PM Competency, PM Structure and PM Organization Culture have Cronbach's alpha above the acceptable lower limit of 0.7, hence a measure of internal consistency. The Pearson correlation analysis was used in the study to evaluate the relationship and the significant of dependent variable and the independent variable. ANOVA was used to compare the difference of means amongst the various groups. The obtained Fratio of 9.415 described the overall regression model as a good fit for the data. The results showed that the independent variables statistically significantly predicted the project performance.