Japanese to English Bus/Financial Business/Commerce (general)

Context:
プロジェクトの効果額を積み上げて、目標額に到達する計画

This literally means "accumulating amount of impact value generated as a result of a series of projects and develop a plan for achieving the target amount".
i.e., calculating the target based on the current projects

I was not sure if you can say "accumulate impact value".

Thank you for your help in advance.