This research was conducted to get a better and more effective schedule in a project compared to the existing one that was made by combining all the time needed in each task and also to know the factors that caused the delay in project because of the project studied in this research was delayed for 11 days. The project itself is data transformation project. Which is an endeavor undertaken to adjust company's internal data with other companies or vendors for specific purpose. There will be sacrifices incurred by the company both in time and financial if the schedule takes too much time and if there's a delay in the project. For this reason, researcher wants to apply a scheduling method which is CPM to find out whether the scheduling is effective or not and to further explore what factors are causing delayed project which is happen to the case the researcher studied on. In this case, researcher using tools such as work breakdown structure and fishbone diagram to find the root cause of the problem and apply PDCA as an endeavor of improvement. The expected result is getting a better schedule and the main factors that cause delay so that it can be used to improve the effectiveness of next project.

Keywords : CPM, Project, Schedule, Delay, Fishbone.