Define Activities is the process of identifying the specific actions to be performed to produce the project deliverables. The Create WBS process identifies the deliverables at the lowest level in the Work Breakdown Structure (WBS), the work package. Project work packages are typically decomposed into smaller components called activities that represent the work necessary to complete the work package. Activities provide a basis for estimating, scheduling, executing, and monitoring and controlling the project work. Implicit in this process is defining and planning the schedule activities such that the project objectives will be met.