A service per real length
Brake pads and a timing belt each block their true length.
The same afternoon, twice. The first customer arrives 15 minutes late.
Back to back
Every customer after him starts 15 minutes late
With 15 minutes of margin
The margin absorbs the delay, the timing belt starts on time
Repair work breaks when the calendar pretends every job is the same size. Splitting jobs properly and protecting the long ones is most of the fix.
One mechanic, one no-show on a long job in an average week.
hours lost to a single missed long job
hours of bay time over a year
of that preventable with a deposit on long jobs
An illustration, not a measurement. Your own numbers depend on your job lengths, your deposit policy and how far ahead customers book.