# CPI fields

The CPI (cost performance index) fields show the ratio of budgeted (or baseline) costs of work performed to actual costs of work performed, up to the project status date or today's date. The timephased (timephased: Task, resource, or assignment information that is distributed over time. You can review timephased information in any available time period in the fields on the right side of the Task Usage and Resource Usage views.) version of this field shows values distributed over time.

There are two categories of CPI fields.

How Calculated    CPI is the ratio of BCWP (budgeted cost of work performed) to ACWP (actual cost of work performed):

CPI = BCWP / ACWP

Best Uses    Add the CPI field to a task view to see the ratio of budgeted to actual costs. This value indicates whether you are over or under budget as of the status date.

Example     You expected that after two days, 50 percent of a four-day task would cost \$60, the BCWP. This task actually incurs a total cost of \$70 for the first two days. The task's CPI is about .85, or 85 percent.

How Calculated    CPI is the ratio of BCWP (budgeted cost of work performed) to ACWP (actual cost of work performed):

CPI = BCWP / ACWP

Best Uses    Add the CPI field to the timephased portion of the Task Usage view to see the ratio of budgeted to actual costs. This indicates whether you are over or under budget as of the status date.

Example     You expected that after two days, 50% of a four-day task would cost \$60, the BCWP. This task actually incurs a total cost of \$70 for the first two days. The task's CPI is about .85, or 85 percent for both days.

Applies to:
Project Professional 2013, Project Standard 2013, Project 2010, Project 2007, Project 2003