The various steps of the project are named phases, and they usually comprise several tasks, which we will describe below. Each elementary phase has a goal that determines the nature of the tasks attached to it. The succession of elementary phases determines the succession of the tasks and hence the overall strategy.
The duration of phases thus depends on the duration of the tasks, whether they are realized sequentially or in parallel.
The challenge is therefore to determine the optimal strategy while taking into account the following criteria: