Implementation of lean construction and critical chain project management (CCPM) for waste management and work estimation on the Ciawi dam construction project

Project delay due to waste (non-added value activity), will increase the project costs, in this case the implementation of lean construction is used to identify waste and risks that can occur in the Ciawi Dam construction project. Waste identification is carried out based on interviews with PM and processed using the Borda method to obtain the results of critical waste, namely waiting and defects. The 5 Whys method is used to determine the root cause of the waste category. Risk identification is processed using FMEA to determine critical risk, namely land acquisition and the Covid-19 pandemic. The most common waste in projects is waiting and defects. Waste and risk identification as a reference for make a mitigation plans for waste and risk that exist in the Ciawi Dam construction project. Scheduling is carried out using the Critical Chain Project Management (CCPM) Method by eliminating additional time that can lead to activities outside the plan or waste, estimated time is obtained for 12 months on work in 2019 to June 2020 without using buffer time, but if there are activities that cause delays in development projects, then the total estimated time needed is 2 years 10 months and 10 days.

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