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This Concept Map, created with IHMC CmapTools, has information related to: Project Estimation, time boxing when box of time is allotted for a specific task or activity, list of all required tasks comes from WBS, Project Estimation techniques bottom-up, guesstimating is often used by inexperienced project managers, delphi used for group decision making, delphi used for estimating when time and money warrant extra effort, WBS defines project phases, top-down involves estimating the project schedule and cost, estimate time in terms of person-months, delphi can cost more, dividing project into smaller modules then estimate time, provide assurance when stakes are high, WBS defines project activities, multiple experts must arrive at a consensus on a particular issue or subject, delphi can provide assurance, estimate effort in terms of person-hours, time boxing disadvantages project team becoming burnt out and frustrated, mandate from upper-management example strategic org. plan, often used by inexperienced project managers because its quick and easy, dividing project into smaller modules then estimate effort