Estimate At Completion (EAC) is a function of time. EAC can be defined as the answer to the question: What is the project likely to cost?. The estimated cost to complete the project, named Estimate To Complete (ETC), is the difference between EAC and AC. Mathematically, the range of EAC is economic value ($) and the domain of EAC is time. The minimun value of EAC is zero but normally close to BAC. There is no maximun for EAC. EAC can be obtained by adding the ETC to the AC (Actual Cost).