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Practice Areas: Legal Project Management, Scheduling, Time Management
Can a float be negative? how?

Can a float be negative? how?
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You can think of float as the gap between EF and LF, or ES and LS. Also Lag and Lead is float. So in this cse, lead time could be considered 'negative' float.

In addition to Andrews response: On the critical path float is zero. In case float is negative the completion of lconnected tasks is behind schedule (completed later than planned) and the schedule needs corrective action (schedule compression).

I totally agree with my fellow colleagues. Negative Float means that activity is or will be behind schedule.

Yes float can be negative. For further information on this you can read these 2 articles:
Critical Path Method
Total Float vs Free Float

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