The project plan is a short document (max. two pages) detailing the steps you need to take, and the order in which to take them, to complete your project. This can be in a list or table format but needs to be sufficiently comprehensive to enable you and your supervisor to monitor progress during the course of the experimental phase. The project plan should include a table of dated milestones specific to your take on the project.
The project plan also needs to have a resource section, where you describe any external resources you require, and at what point in the project these will be needed. This includes items that need to be bought in, objects to be built by the workshops, and any input you need from people other than yourself or your supervisor. You should also mention here if your project relies on particular weather conditions at certain times (although the Institute cannot guarantee to deliver them to order!) and make alternative provisions in case they don't materialise.
If you need to have something built by the workshops, your project plan should include a finalised design plan which has been agreed upon with both your supervisor and workshop staff.
Make sure you and your supervisor discuss your project plan in detail before you submit it.