You can save time fine-tuning project details by taking a fresh look at the main components in your plan, such as tasks and resources. You should reevaluate the assumptions and goals that led you to include them. For instance, before you change the number of resources assigned to a task, you may find that your plan doesn’t require that task at all.
This would also be a good time to look for any obvious errors that may have inadvertently slipped into your plan, such as an incorrect hourly rate for a resource.