Total Float (TF) is the maximum number of work periods by which an activity can be delayed without delaying project completion or violating a target finish date .(Wideman Comparative Glossary of Common Project Management Terms v2.1)
Other Definitions
Total Float (“TF”) – The amount that an activity can be lengthened without delaying the project completion, assuming that all other activities are done in their normal time .
(Wideman Comparative Glossary of Common Project Management Terms v2.1)