2. How can we free ourselves from annual balance sheets to arrive at a cumulative economic balance sheet?

Simply add up the forecasts made on an annual basis (or any other reference period), and add them together, starting from the project start date. Assuming that T0 is the production start date:

• the project time scale is in negative dates;

• that of production on positive dates. Remember that the production period covers :

  • the manufacturing period of the product and/or service,

  • the sales period for spare parts, after-sales and service upgrades.

The graph in the following figure shows :

• on the expenditure side :

  • on the T0 production start-up date, the "entry ticket", the amount of expenditure...