For large projects especially, calculating the resources utilized during project execution up to lowest level of work to calculate exact cost and time on a frequent basis is really important and requires a scientific approach. This helps in forecasting the right timeline and budget required on a regular basis and is the key to prevent cost over-run blown out of proportions. Our project, program and portfolio monitoring system, P3® calculates and compares data of hundreds of smaller work pages in the project with their actual baseline and rolls up this data to a control account level for baseline comparison. The cost data is used to forecast the future budgetary requirements on the near future timeline.