Final answer:
The Cost Performance Index (CPI) for the scenario is 0.818, which indicates that for every dollar spent on the project, only about $0.82 of value is being earned.
Step-by-step explanation:
The Cost Performance Index (CPI) is a measure used in project management to calculate the efficiency of budgeted resources on a project. It is defined as the ratio of Earned Value (EV) to Actual Cost (AC).
For the given scenario, the EV is the budgeted cost of work performed, which is $600 per web page times 1.5 web pages completed, resulting in $900. The AC is the actual amount spent, which is $1100. Thus, the CPI is calculated as EV divided by AC, or $900 / $1100, giving us a CPI of approximately 0.818.
The CPI of 0.818 indicates that for every dollar spent, only about $0.82 of value is actually being earned, signifying a cost efficiency below expectations.