Abstract
It is well known that an EAC forecast considering a cumulative CPI is reliable. However, most projects have several different phases, and the cost performance that the project has experienced to date can not be expected to continue in the next project phase. This article explores this CPI variance, and suggests a new EAC forecast technique considering different project phases discriminated by work contents or project members. This EAC forecast technique considers a cumulative CPI in each project phase varied statically and dynamically. By this technique, an EAC can be forecasted early and accurately.