Schedules are management tools that allow leaders to make informed decisions about activities on a construction site. Although the terms planning and scheduling are often used interchangeably, there is a significant difference between these two activities, and an accurate schedule cannot be developed without first developing a proper plan. Planning activities involve developing the logic of how a project is to be constructed—beginning with the construction documents that define the end product, and then identifying the individual tasks or steps required to arrive at this end result. Scheduling consists of integrating the plan with a calendar or time period, and assigning time durations and resources to each task.