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activity name; WBS reference; Slack/Float: Determines the duration of activity delay that the project can tolerate before the project comes in late. The difference between the earliest and the latest start time. [1]: 502 [2]: 183 i.e. Slack = latest start date - earliest start day or Slack = latest finish time - earliest finish time.
Example from MIL-HDBK-881, which illustrates the first three levels of a typical aircraft system [1] A work-breakdown structure (WBS) [2] in project management and systems engineering is a breakdown of a project into smaller components. It is a key project management element that organizes the team's work into manageable sections.
The "extra" duration of each task on the critical chain—the difference between the "safe" durations and the 50% durations—is gathered in a buffer at the end of the project. In the same way, buffers are gathered at the end of each sequence of tasks that feed into the critical chain.
The work breakdown structure (WBS) is a tree structure that shows a subdivision of the activities required to achieve an objective – for example a portfolio, program, project, and contract. The WBS may be hardware-, product-, service-, or process -oriented (see an example in a NASA reporting structure (2001) ). [ 75 ]
In a project network, a dependency is a link among a project's terminal elements. [citation needed]The A Guide to the Project Management Body of Knowledge (PMBOK Guide) does not define the term dependency, but refers for this term to a logical relationship, which in turn is defined as dependency between two activities, or between an activity and a milestone.
Before a project schedule can be created, the schedule maker should have a work breakdown structure (WBS), an effort estimate for each task, and a resource list with availability for each resource. If these components for the schedule are not available, they can be created with a consensus-driven estimation method like Wideband Delphi. [5]
A Work breakdown structure element may be a product, data, a service, or any combination. WBS also provides the necessary framework for detailed cost estimating and control along with providing guidance for schedule development and control. Work package is a subset of a project that can be assigned to a specific party for execution. Because of ...
Inputs: Organizational process assets, Project scope Statement, Activity list, Activity attributes, project Schedule Network diagrams, Activity resource requirements, Resource calendars, Activity duration estimates, project management plan, risk register