Globally public procurement plays a pivotal role in the provision of goods, works and services in every economy. Enhancement in the performance of the public procurement system is key ingredient for ensuring value for money is achieved in order to safeguard public funds particularly in the implementation of economic pillars such as the “Big Four Agenda” and Vision 2030. This is the case because 60% of Kenyan budget is spent through procurement contracts. This study sought to investigate the influence of user departments on the performance of procurement process in Kenya. Specific objectives of the study included: To examine the role of specification writing on the performance of public entities in Kenya, To investigate the influence of procurement plan on the performance of public entities in Kenya, To assess the effect of tender evaluation on the performance of public entities in Kenya and To determine the influence of receiving procedure on the performance the public entities in Kenya. The study will be guided by the following theories: resource based theory, systems theory, Expectancy theory and institutional Theory. Descriptive research design as well as quantitative research design were adopted using both qualitative and quantitative approaches. The target population was 1000 employees of Nairobi County government. The study adopted stratified random sampling to select the sample size of 100 respondents. Data was collected using questionnaires and oral interview . Descriptive statistics was employed aided by statistical package for social sciences version 21 to compute the percentages. Inferential statistics using regression and correlation analysis was applied to assist in examining the relationship between variables.