Examples 24-hour Shift Rosters

Shell 2-2-2

legenda
mmorning
aafternoon
nnight
xoff shift
The roster designed by Shell.
 MoTuWeThFr SaSu Good Bad
1. m m a a n n x
  • Fast forward shift rotation, with well enough rest between duties.
  • Minimal disturbance of the biorhythm by only 2 sequential night shifts.
  • Very regular, cycle repeats after just 10 days.
  • Always 4 consecutive days off.
  • Well enough rest to recover from night shifts.
  • Recover from night shift on Saturday in line 4.
  • Only 2 full weekends off in 10 weeks.
  • Always 6 consecutive days off.
2. x x x m m a a
3. n n x x x x m
4. m a a n n x x
5. x x m m a a n
6. n x x x x m m
7. a a n n x x x
8. x m m a a n n
9. x x x x m m a
10. a n n x x x x
 MoTuWeThFr SaSu
Morning, m22222 22
Afternoon, a22222 22
Night, n22222 22
Off, x44444 44

Example: New Shell roster

 MoTuWeThFr SaSu Good Bad
1. m m a a n x x
  • Shorter workweeks than the standard 2-2-2 roster
  • Fast forward rotation, with plenty of rest between shifts.
  • Minimal disruption of biorithm, at most 2 sequential night shifts.
  • Cycle repeats after 5 weeks.
  • The weekends off are always an extended weekend.
  • Cycle is more tricky to remember than the standard 2-2-2 roster.
  • Once every 5 weeks an odd single night shift.
  • Recover on Saturday after that odd single night shift.
  • Often only 3 days off after night shifts, in stead of 4 in the standard 2-2-2 roster.
2. x x m m a n n
3. x x x x m a a
4. n n x x x m m
5. a a n n x x x
 MoTuWeThFr SaSu
Morning, m11111 11
Afternoon, a11111 11
Night, n11111 11
Off, x22222 22

BP 5 shifts

 MoTuWeThFr SaSu Good Bad
1. m x x a a a a
  • 2 full weekends off per cycle of 5 weeks.
  • 1 long weekend, 4 days off
  • After night shifts always 4 days off.
  • At most 4 consecutive work days.
  • 3 till 4 consecutive night shifts disturb the biorhythm.
  • After afternoon shifts just one day off.
  • The pattern is less regular than the 2-2-2 roster.
2. x n n n x x x
3. x m m m m x x
4. a a a x n n n
5. n x x x x m m
 MoTuWeThFr SaSu
Morning, m11111 11
Afternoon, a11111 11
Night, n11111 11
Off, x22222 22

Shifts for 3 teams

 MoTuWeThFr SaSu Good Bad
1. x m m a a x x
  • 2, 3 or 4 consecutive workdays
  • Rhythm offers variation, offers space for social, family activities.
  • 2 out of 3 weekends off
  • Irregular workweeks of 2, 3 or 4 days
2. m a a x x d d
3. a x x m m x x
 MoTuWeThFr SaSu
Morning, m11111 --
Day, d----- 11
Afternoon, a11111 --
Off, x11111 22

40 hours per week

 MoTuWeThFr SaSu Good Bad
1. x m m m m x x
  • Regular workweeks of 4 or 5 days
  • Alternating rhythm, giving room to arrange social life
  • 3 out of 5 Sundays off
  • One weekend spoiled by night shift on Saturday
  • 40 hours per week is quite tough for employees doing shift work
  • 2x short rest of just one day off
2. a a n n n x x
3. d d d d x a a
4. n n x x d m m
5. m x a a a n x
 MoTuWeThFr SaSu
Morning, m11111 11
Day, d11111 --
Evening, a11111 11
Night, n11111 1-
Off, x11111 23

Example: 4 teams shift roster

With thanks to Jamie Winton, Petroleum Industry, South Australia.
 MoTuWeThFr SaSu Good Bad
1. x x m m m d x
  • regelar, short workweeks of just 3, 4 or 5 days.
  • once in 4 weeks an entire weekend off.
  • twiced in 4 weeks a half weekend off.
  • This shift roster is quite taxing for staff with an average of 42 workhours a week.
    Check the labour law in your country (Conditions of employment in Australia) to see if this is allowed.
  • 3 night shifts in a row, of which 2 long nights.
2. m m a a a x x
3. a a n n x x d
4. n n x x n L L
 MoTuWeThFr SaSu
Morning, m11111 --
Day 12 hour shifts, d----- 11
Afternoon, a11111 --
Night, n11111 --
Long night 12 hour shift, L----- 11
Off, x11111 22

More on shift roster design

SUMit
Australia Fair Work
Australian Council of Trades Unions Health And Safety Guidelines For Shift Work
American College of Emergency Physicians Circadian Rhythms and Shift Work
Canada, Saskatchewan governement Choosing the right shift schedule
Workers Health Centre, Australia Shiftwork and extended hours
NSW Nurses' Association Surviving shiftwork