Long hours are still treated in some firms as a sign of .
The output data does not support that reading.
Beyond roughly fifty hours a week, extra time adds very little.
Beyond sixty, errors rise fast enough to cancel the gain.
follows a predictable path rather than arriving suddenly.
goes first, then patience, then the quality of the work.
By the time a manager notices, recovery takes months.
Firms that report lower staff turnover within a year.
is expensive, so the saving is easy to measure.
What is harder to measure is the work that never got done.
An team does not propose anything new.
That loss appears in no accounts and is the largest of all.