Simplified activities model for earned duration calculation

The research purpose to reduce complexity occur by lot of activity items on conducted Earned Duration method in forecasting project duration. The process of reducing activity items by grouping those items result should be on the same population with realization duration. There are two types of data which are S curves of ongoing project and realization duration from construction projects in Jakarta area. The S curve of ongoing project should be used to calculate project duration by simplified activity items model for each project to gain average forecasted duration compared to the realization duration. The result shows that simplified activity items model could be used in ED method to forecast project duration as reducing its complexity without compromising the ability of duration forecast. In this research, accuracy is not calculated and shows ED method using simplified activity items denote that the result of forecast calculation is a part of project duration population. Data were collected only from multistory building projects in Jakarta area. Substructure is not included in this research. This paper fulfils the validation of simplified activity items model to forecast project duration with ED method on a project that contains lot of activity items.