The latest time an activity may begin without delaying the project finish date of the network. This date is calculated as the late finish minus the duration of the activity. The latest dates by which an activity can start to avoid causing delays in the project. Many PM software packages calculate late dates with a backward pass from the end of the project to the beginning.

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

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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, 360 Difference, and now too.
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