The schedule includes considerations of shift overlap, shift change the four hour work week pdf download free and alignment with the clock, vacation, training, shift differentials, holidays, etc. This shift often occurs from either 06:00 or 07:00 to either 14:00 or 15:00 for eight-hour shifts, and from 06:00 to 18:00 for twelve-hour shifts. This shift often occurs from either 14:00 or 15:00 to either 22:00 or 23:00 for eight-hour shifts, and is not used with twelve-hour shifts.
This shift often occurs from either 22:00 or 23:00 to either 06:00 or 07:00 for eight-hour shifts, and from 18:00 to 06:00 for twelve-hour shifts. This is defined as a day on which a shift does not begin. Note that a worker transitioning from N to O works for the first six or seven hours of the first day “off”. Thus, when days off follow night shifts, the first one or more days “off” are, in fact, days of recovery from lack of nighttime sleep.
Note also that this daily notation refers to the start of a shift. If a shift starts at 23:00, then this is a W day even though only one hour is worked. The day after this shift is an F day if no shift starts on this day, though many hours have been worked from midnight on. One shift system may allow many shift plans. 1 allows twelve different plans in three serially-identical sets.
Within a set, DONO has the same sequence as NODO. DNOO is the preferred sequence because days off follow night work and there are two consecutive days off. The US Navy uses a three shift system with an 18-hour day instead of a 24-hour day. The 24-hour period is divided into four shifts: 00:00-06:00, 06:00-12:00, 12:00-18:00, and 18:00-00:00. A sailor stands watch on their shift.