The construction sector plays a pivotal role in global societal objectives and economic development. Recognizing the significance of construction productivity is crucial, as it directly impacts the economy and costs borne by government agencies. This research paper aims to identify the underlying causes of variables that affect worker productivity in the building construction industry. To accomplish this, a standardized questionnaire is employed to investigate all potential components that may influence worker productivity. The survey results are subsequently analyzed using the Relative Importance Index, a quantitative technique that prioritizes criteria based on their relative significance. he findings of this research can inform decision-makers, project managers, and industry professionals about the critical areas that require attention to optimize worker productivity and minimize delays and cost overruns in building construction projects.