Project Planning of Offshore Pipelines Replacement: Study Case at Offshore North West Java

There are many factors that lead to project delay, for example hurricane, one of weather factors that make it impossible to do work or factors like lack of utilities and construction equipment, delays in purchasing material orders, lack of experienced and skilled human resources in the field, delay costs down to purchase activities on the project. In addition, there are delays in critical activities because they have a large impact on the duration of the project. Therefore, it is necessary to do an analysis by looking for activities that are critical to the project and factors that can cause delays in the new pipeline project because it can endanger the owners and contractors. This study will discuss three factors, i.e. (1) the determination of the critical path, (2) the determination of the root causes that can cause delays, and (3) the risk of over time, of new pipelines replacement project in North West Java, Indonesia. There are 4 indications of delay in this project, which are delay that occurred in June 2018, September 2018, and October 2018. The biggest deviation between the targeted value and the actual value occurred in October 2018, which was 5,05%. This study uses six sigma methods, critical path, fault tree analysis and event tree analysis. The results of fault tree analysis will get the probability value for the top event of the project delay. The results of the event tree analysis will get the risk level of each factor that causes delays. Six sigma results will get to the root of the problem, the value of sigma, and what corrective action is taken.