Residency Block Scheduling Explained (EM Programs)

If you're new to running an EM residency schedule, "block scheduling" can sound like jargon. It's actually a simple idea with a lot of moving parts. This explainer walks through how blocks, PGY targets, off-service rotations, and multi-site assignments fit together — and where it gets hard.

What is a block?

A block is a fixed scheduling period — many programs use thirteen 28-day blocks across the academic year (July 1 start), though some schedule by calendar month. Within each block, a resident is assigned to a rotation: EM at a given site, an off-service rotation (anesthesia, PICU, ultrasound), or something like EMS/flight. The ED schedule you build is the clinical coverage for the residents who are on EM that block.

Per-PGY shift targets

Different training years carry different loads. A PGY-1 might owe 18 shifts a block, a PGY-3 sixteen, a chief twelve. The schedule has to hit each resident's per-PGY target — not too few (training requirements) and not too many (duty hours, burnout). Set these once per block and let the generator hit them.

Off-service rotations

When a resident is off-service for a block, they're off the EM schedule — and their EM target should drop to zero for that block so the rest of the class doesn't silently absorb their shifts. The critical invariant: marking someone off-service should not change how many shifts everyone else works. Slots simply go unfilled (which is fine — programs don't need to fill every slot, they need each resident to hit their count).

Multi-site and custom rotation blocks

Many programs rotate residents across a main site, community affiliates, and a peds site. A custom rotation block lets you say, for example: "this block is 3 peds shifts, at least half the remainder at the main site, the rest at the community ED." Pediatric rotations are often restricted to senior residents, so you also want to gate certain sites by PGY year.

Where block scheduling gets hard

• Duty hours across block boundaries. The 80-hour average and 1-in-7 off span the seam between blocks — see our ACGME duty hours guide.
• Night clustering across sites. Night runs should stay together for circadian reasons even when they span two sites in the same block.
• Didactic protection. Protected conference time has to be carved out before clinical shifts land.
• The intern boot-camp month. Early interns often work reduced loads with senior buddy shifts on specific dates.

The payoff

Done well, block scheduling means every resident hits their training target, duty hours hold automatically, off-service months don't penalize the class, and the program director isn't rebuilding a spreadsheet at midnight. That's the bar.