Project managers spend a lot of time focusing on activities and what actions best suit the needs of a project. This determination is difficult and outside the realm of this article. However, while internal project planning requires a lot of detail and decision-making, donors do not necessarily want to see all of that in the proposal. You will likely have to summarize your plans in the proposal, and choosing what to include can be hard.
When developing your project activities in your proposal, these are the most basic points you need to prove to donors:
1) Project activities directly follow project objectives
2) Project activities are all aligned with an overall strategy
3) Clear thought and research has been put into the activities
It is important to make the proposal flow and show one cohesive and holistic project. To this end, it is better to show how the activities relate to the rest of the project than to go too far into the particulars. Missing any of these points signals to the donor that the organization is not clear in what it wants to achieve and does not have a good plan. If the donor requires further details, they will ask for it.