DuPont shift schedule implemented as a verifiable matrix
This implementation uses a 28-day, four-crew matrix with 12-hour Day and Night shifts. Names and anchor dates vary between organizations, so compare every phase with your approved source schedule.
Internal review Aug 6, 2026 · No external review
Pattern dupont@1
DuPont rotating · version 1
Four crews rotate across 12-hour day and night shifts over a versioned 28-day matrix.
Cycle length
28 days
Required crew phases
4
Average planned hours per crew per week
42 planned hours
Longest consecutive shift stretch
4 shifts
Longest break in the cycle
7 days
Day
7 shifts
Night
7 shifts
Implemented crew-phase matrix
Exact version dupont@1 cycle. D is Day, N is Night, and O is Off.
Crew
Day 11
Day 22
Day 33
Day 44
Day 55
Day 66
Day 77
Day 88
Day 99
Day 1010
Day 1111
Day 1212
Day 1313
Day 1414
Day 1515
Day 1616
Day 1717
Day 1818
Day 1919
Day 2020
Day 2121
Day 2222
Day 2323
Day 2424
Day 2525
Day 2626
Day 2727
Day 2828
Phase 1
N
N
N
N
O
O
O
D
D
D
O
N
N
N
O
O
O
D
D
D
D
O
O
O
O
O
O
O
Phase 2
D
D
D
O
N
N
N
O
O
O
D
D
D
D
O
O
O
O
O
O
O
N
N
N
N
O
O
O
Phase 3
O
O
O
D
D
D
D
O
O
O
O
O
O
O
N
N
N
N
O
O
O
D
D
D
O
N
N
N
Phase 4
O
O
O
O
O
O
O
N
N
N
N
O
O
O
D
D
D
O
N
N
N
O
O
O
D
D
D
D
How this implementation behaves
The four phases are offset so one crew covers each Day and Night slot. A phase includes four-shift and three-shift work blocks plus short and long breaks; the 28-day matrix, not the name alone, defines this version.
Work and recovery blocks in this version
In displayed phase 1, this site implements four Nights, three Off days, three Days, one Off day, three Nights, three Off days, four Days, and seven Off days. The other phases offset that same coverage system so one crew occupies each required Day and Night slot.
Align the DuPont phase before adding names
The anchor date is cycle day 1 for all four displayed phases. Map each real crew to the phase it actually follows on one known service date. A one-day anchor error shifts every Day, Night, and Off assignment in the generated horizon.
Common DuPont setup errors
Relying on the DuPont label alone even though workplaces can use different phase names, starting positions, or local variants.
Assuming displayed phase 1 automatically means the workplace's Crew A without checking a known date.
Changing Day or Night endpoints without reviewing real coverage gaps, overlaps, rest, and daylight-saving warnings.
Verify these items before operational use
Align cycle day 1 with a known date from an approved source schedule; a wrong anchor shifts every assignment.
Confirm that each real crew maps to the intended phase instead of assuming the displayed phase order matches local labels.
Confirm the local Day and Night endpoints. Changing them can create real gaps, overlaps, or daylight-saving duration warnings.
Review member exceptions, minimum rest, staffing targets, qualifications, leave, agreements, and local rules outside this template.
Implementation status and source boundary
Implemented versions
dupont@1 in the site template registry
Internal content review
Aug 6, 2026
External review
Not completed
This matrix is the site's versioned DuPont implementation. Automated checks verify its 28-day length, four crew phases, and one Day plus one Night crew per service date. It has not been externally reviewed or validated against your workplace roster.
