Two delays of identical length do not always carry the same consequences. Sometimes one is compensable, and the other is not, and the difference frequently comes down to schedule float.
Understanding float and who is entitled to use it is one of the most contested issues in delay analysis.
What Float Actually Is
Float is the amount of time an activity can be delayed without pushing back the project completion date. It exists because most schedules contain multiple paths through the work, and not every path is equally critical.
An activity with 10 days of float can slip by up to 10 days without affecting the finish date. Once that float is used up, any further delay becomes critical and starts eating into the completion date directly.
How Float Is Calculated
Float is derived through the Critical Path Method, which calculates the earliest and latest possible start and finish dates for every activity in the schedule.
The difference between these dates produces the float value. Activities with zero float sit on the critical path, meaning any delay to them delays the entire project.
This calculation depends heavily on schedule logic, so poorly built schedules with missing or incorrect relationships between activities can produce float values that do not reflect real project conditions.
Why Float Ownership Decides Liability
Contracts rarely state clearly who owns the float in a shared schedule, and that silence creates disputes. Three common positions tend to appear:
- The project owns the float, and either party may use it without penalty
- The owner controls the float, protecting itself from contractor-caused delays
- The contractor controls the float, protecting its own schedule flexibility
The position that applies can completely change the outcome of a claim. A delay that consumes available float may be non-compensable under one interpretation and fully compensable under another.
Where This Plays Out in Practice
Fast-growing construction markets see float disputes constantly, since compressed schedules leave little room for error. Providers of construction scheduling in San Francisco are regularly asked to determine whether float was already consumed before a disputed delay event occurred.
A qualified construction delay expert witness in San Francisco will trace float consumption update by update, identifying the exact point where a project moved from having a cushion to having none.
Getting the Analysis Right
Float analysis is rarely simple, since it requires reviewing schedule updates sequentially rather than comparing only the first and last versions. Skipping updates in between can hide exactly when float disappeared and who was responsible at that moment.
This is why experienced delay analysis consulting relies on a full update-by-update review rather than a single snapshot comparison, and why a seasoned construction scheduling expert witness treats float tracking as central to any credible delay opinion.
Get Clarity on Float and Delay Ownership with HPM Consultants
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At HPM Consultants, we bring deep expertise in schedule float analysis to disputes where responsibility is unclear.
Our team includes a respected construction delays expert experienced in tracing float consumption through complex, multi-year schedules. We know how to identify the moment a delay shifted from harmless to compensable, and who was accountable when it happened.
Contact us to schedule a free consultation and get clarity on how float may be shaping the outcome of your dispute.