The lowest-level units illustrated in the WBS, used to estimate project schedule and budget.

Match each of the key terms with the definition that best fits it.

A. Activity B. Arrow diagramming method C. Cone of uncertainty D. Decomposition E. Define Activities F. Dependency G. Discretionary dependencies H. Dummy activity I. External dependencies J. Internal dependencies K. Lag time L. Lead time M. Mandatory dependencies N. Milestones O. Plan Schedule Management P. Precedence diagramming method Q. Product breakdown structure R. Project scheduling S. Rolling wave planning T. Schedule management plan U. Scope baseline V. Sequence Activities W. Templates X. WBS dictionary Y. Work packages