What's the difference between fixed duration and fixed effort projects?

In fixed duration projects, task duration is fixed and task effort varies based on the number of resources assigned to the task and their allocation. It's a good idea to create fixed duration projects when you have strict milestones and deadlines.

In fixed effort projects, task effort is fixed and the task duration varies based on the number of resources assigned to the task and their allocation. Typically, you should create fixed effort projects when you have a tight budget for labor resources or when the availability of the required resources is crucial.