The difference between the time available for performing a task and the time required to complete it. If the total float for a task equals zero, then that task is on the critical path

(Wideman Comparative Glossary of Common Project Management Terms v2.1)

(see also slack)

Other Definitions

Float – Available time for activity execution less time taken by the activity .(Wideman Comparative Glossary of Common Project Management Terms v2.1)

Float – The amount of time that an activity can slip past its duration without delaying the rest of the project . The calculation depends on the float type. See Start Float ,Finish Float ,Positive Float , and Negative Float . All float is calculated when a project has its schedule computed. (Wideman Comparative Glossary of Common Project Management Terms v2.1)

Float – A measure of the time flexibility available in the performance of an activity. Available in three flavors: total float, free float and independent float. The minimum amount of time by which an activity will be extended due to factors outside the project managers control. (Critical Chain Project Management by Lawrence P. Leach)

(see also slack)

J. Jerrald Hayes
I am ex-architectural woodworker and general contractor turned IT, Business and Project Management consultant, software developer wannabe senior division triathlete and ski racer, Yankee fan and founder of Paradigm-360.com, 360 Difference Mac4Construction.com,iOS4Construction.com and now TheBuildingAndRemodelingWiki.com too.
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