Hours you cannot see
Second jobs, other sites, travel, on-call and training — the hours no single system holds.
Travel That Is Work
For mobile workers travel is the largest uncounted category, it is already recorded elsewhere, and nothing connects that system to the arithmetic.
The Second Employer
A person with two jobs has one body and one week. Most limits attach to the person rather than to the employer, and neither employer can see the whole figure.
Two Sites, One Person
When somebody works at two locations of the same organisation, each one sees half a week, and the only system that could add them up is the one nobody has asked for.
On-Call and Standby
How much of an on-call period counts as working time depends on how much it constrains the person, which is a question about the arrangement.
Training the Employer Requires
Mandatory modules completed at home on a laptop are working time in most regimes, and the learning platform knows exactly how long each one took.
Work Taken Home
The hours after the laptop goes home are the least recorded category, and the only trace they leave is in systems nobody looks at for this.
Joining It Up
Five systems each hold part of a person's week. Assembling the whole is a sequence of small joins, and the order decides whether it ever finishes.