Как понять эту фразу?
Всё предложение:

Development of the port project requires some initial steps and investments before a position is
reached where financial investors can be attracted, and / or definitive agreements can be executed with a developer/operator. There should first be some pre-feasibility work completed to confirm that the siteis right and appropriate, and to scope the market (following the 20% effort for 80% visibility on the results model).

Спасибо!