Total Slack



Total slack is is the difference between the calculated earliest finish time of the very last activity and the project's required completion time. Successful Project Management. Total Slack Definitions Total slack is is the difference between the calculated earliest finish time of the very last activity and the project's required completion time. Successful Project Management by Jack Gido and James P. Slack is a channel-based messaging platform. With Slack, people can work together more effectively, connect all their software tools and services, and find the information they need to do their bes. Free Slack is the number of days that an activity can have before it starts delaying the next (successor) activity. Total Slack is the number of days that activity can have before it starts delaying the whole project. Let's assume that we have a project that consists of 4 tasks. Total slack is the amount of time in a schedule that a task can be delayed before an entire project's completion date is delayed. Slack is the amount of time that can be afforded to the delay or procrastination of a task before it adversely affects other tasks.

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Total Slack Definitions

  1. Total slack is is the difference between the calculated earliest finish time of the very last activity and the project's required completion time.

    Successful Project Management by Jack Gido and James P. Clements


  2. Total slack/total float is measured by the amount of time that a schedule activity can be delayed or extended from its early start date without delaying the project finish date or violating a schedule constraint.

    A Guide to the Project Management Body of Knowledge by Project Management Institute


  3. Total Slack can be defined as the difference between the latest allowable date and the earliest expected date.

    Project Management: A Systems Approach to Planning, Scheduling, and Controlling by Harold Kerzner?


Total Slack Explanation

Total SlackTotal

Sometimes an activity takes more time than the estimated duration. This time must be calculated in order to know if this delaying has any effect on the total project completion time. The difference between the earliest finish time of the last activity of the project and the required project completion time is called total slack. Total slack is also called float. Total slack can be positive or negative. A positive slack shows the maximum amount to time the activity can be delayed without affecting the project completion time. Negative slack time shows the amount of time the activities must be hurried in order to complete the project on time. A zero slack shows that the project will be completed exactly on time and no activity can be postpones or delayed not just even for a little bit.

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