Highly optimized schedules in minutes —
engineered to protect circadian rhythm
A constraint solver builds highly optimized, provably fair schedules at the push of a button — then defends the body clock with forward, circadian-aware rotations grounded in the shift-work evidence. A purpose-built engine for each world:
ACGME-safe resident blocks
Duty-hour rules, PGY-aware fairness, and resident requests — all solved at once.
Attending & community ED shifts
Fatigue-smart nights and weekends, fair across the group, easy swaps — no residents required.
3 months free for new programs & groups · full setup included · no card to start
Everything scheduling, in one place.
Build optimized schedules, manage your roster, field time-off and shift requests, and read insightful quality metrics — all in one platform, instead of juggling spreadsheets, email threads, and scattered documents.
Optimal, not just filled
A CP-SAT solver searches the whole solution space and returns the mathematically best schedule — not the first one that happens to fit.
ACGME-safe by default
Duty-hour limits, required days off, and rest between shifts are enforced on every build and every resident-initiated swap — a non-compliant schedule can't be published.
Circadian protection
Shifts rotate forward through the day and protect adequate time off to reset the body clock after a run of late shifts.
Balanced across the class
Nights, weekends, and locations are tracked and balanced fairly across the whole year and within each PGY class.
Per-resident shift targets
Each resident's shift target — and their max nights, weekends, and consecutive days — is respected, right down to the individual.
Protected educational time
Designate your didactic conferences and educational sessions and the scheduler keeps them clear of clinical shifts.
Custom rules, no code
Encode program-specific policy in plain language — forbid, limit, run-length, pairing, separation, quotas, transitions, and golden weekends.
Requests & self-service swaps
PTO, off-requests, and shift preferences enter the math, and residents trade shifts themselves with built-in approval — everyone on one live schedule.
Metrics & wellbeing scores
Every schedule earns a quality score, plus program-wide and per-resident wellbeing scores that blend personal preferences with the circadian evidence.
Circadian science, built into every schedule
Shift work disrupts the circadian rhythms that govern sleep, hormones, metabolism, and mood — and the evidence on what that does to clinicians is not subtle.
more serious medical errors made by fatigued interns on traditional long-hour schedules.4,5
the WHO / IARC classification of night-shift work — a probable human carcinogen.1
day → evening → night rotation eases circadian adaptation versus backward flips.6,7
Five protections in every build
- 1Circadian-aware rotation — forward day→evening→night sequences, not jarring reversals.
- 2Limited consecutive nights, spread equitably across the team.
- 3Genuine rest between shifts — enough time to actually recover, not just clock out.
- 4Fair tracking of the undesirable shifts, so the same people don't always absorb them.
- 5Duty-hour and rest rules enforced across every swap, not only the first build.
Every schedule earns a wellbeing score that blends each person's preferences with the circadian evidence — so you can see the human cost of a schedule before you publish it.
Read the science & full referencesThe body clock drifts later far more easily than earlier — so shifts rotate forward through the day, the direction your circadian system tolerates. Backward flips that trigger fatigue are penalized.
After a run of late shifts, we hold back enough consecutive time off for the body clock to reset — never jumping straight from a late shift back onto days.
Emergency Medicine has its own duty-hour rules. We enforce every one.
EM's limits are stricter and structurally different from other specialties — and they don't permit the weekly averaging other programs lean on. We encode all of them as hard constraints, so a non-compliant schedule can't be built or published. And they hold on every solve and every swap.
The rules in full, with sourcesFrom roster to published block in one sitting
Set your rules once
Add residents, PGY levels, shifts, coverage minimums, and program preferences. It carries over block to block.
Solve the block
Press build. The engine explores many possible schedules, scores each, and keeps the best — usually back in minutes.
Review & publish
Read the schedule analysis, tweak by hand if you like, then publish to residents with live swaps and personal calendar feeds.
One flat price, by the size of your team
Every plan includes the full solver, safety safeguards, schedule analysis, unlimited blocks, hand-editing, swaps, and support. Pick your product, then the tier that matches your size — billed month to month, no annual commitment, nothing metered, no per-shift fees.
- Unlimited schedule generation
- Full ACGME & wellness safeguards
- Schedule analysis & wellbeing score
- Resident requests, swaps & calendar feeds
- Custom configuration + dedicated onboarding
- Priority support & continuous model updates
Every new program and group starts with 3 months free — full setup included, no card required.
Your next block could be solved before your coffee's cold.
New programs and groups get 3 months free — full setup and onboarding included. Tell us about your team and we'll get you started.
- 3 months free — no credit card to start
- Flat monthly pricing, cancel anytime
- Setup, configuration & onboarding included
Prefer email? admin@emscheduling.com
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