(Unlike Code 128, which uses shifts and four different element widths.)
Any value can be rapidly reduced modulo 2 + 1 using only shifts and adds, as explained in the next section.
They use eight-hour shifts; so in theory someone is always on duty.
You can use single shifts, locking shifts or the same character from more than one character set.
The best solution would probably be to use time-zone shifts whenever universal time started to get seriously out of sync with solar time.
ASA units usually operated in four groups using revolving shifts to provide coverage twenty-four hours a day, seven days a week.
To protect and serve the public all night and day, many police departments use rotating shifts.
We use different personnel groupings, formations and shifts.
The five and two or 3-2-2 pattern provides 24/7 coverage using 4 crews and 12-hour shifts over a fortnight.
The seven-day eight-hour rotating shift provides 24/7 coverage using 8-hour shifts with 14 crews.