Estimated cost calculations

One key metric in project management is to predict costs on a project. This helps project managers to understand where a project is heading and is aware of remaining costs. In the project management methodology there are a couple of key figures related to that:

CTD = Cost to date. These are a current, registered costs of a project until the current date

ETC = Estimate to complete. These are the expected/ estimated remaining costs of a project

EAC = Estimate at completion. These are expected/ estimated costs for the finished/completed project

All these figures are connected and can be calculated with a simple formula:

CTD + ETC = EAC

There are different approaches on how to calculate the remaining estimates of a project (ETC/EAC). Tempo Budgets offers two calculation scenarios. The first scenario is based on performance and the second scenario (only visible on the cost/revenue summary page) is based on Forecasting known future costs .

That means:

1. The performance based scenario calculates the EAC. Which means that the ETC is computed by:
   ETC = EAC - CTD

2. The calculation model based on known planned and known allocated costs calculates the estimated outcome based on what on your allocated resources on the project. Means that the remaining project costs (ETC) are fixed. In this case the outcome is computed by:
   EAC = CTD + ETC

From the steering committee report you will get information on both calculated scenarios

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