This document provides information about construction cost estimation for a project by PT. Wijaya Karya (Persero), Tbk. It discusses factors that influence price, elements of direct and indirect costs, unit cost calculation methods, the project cost estimation process, risk management, and roles and responsibilities in the estimation process. Key points include direct costs include material, equipment, and service costs while indirect costs include project management, overhead, financing costs, insurance, and contingencies. Risk management involves identifying, analyzing, and responding to risks through processes like risk planning, identification, analysis, and response monitoring. The estimation process involves developing resource lists, analyzing prices, compiling bills of quantities, and assembling the final cost estimate report.