Shift design

Slides done? Here’s the same idea in a bit more depth — the part worth keeping.

In depth: four dials that move coverage more than headcount

Before you ever ask for another head, you have four dials on every shift — its start time, its length, where its breaks fall, and which days it’s worked — and turning them reshapes coverage dramatically. Most coverage problems aren’t a shortage of people; they’re people in the wrong shapes. Shift design is how you fit the supply you already have to the demand curve you already know.

Starts, lengths and the peak

If everyone starts at nine, coverage jumps late and collapses early; stagger starts across the morning — eight, half-eight, nine, half-nine — and the line ramps up smoothly to match the build in demand. Length matters too: a mix of shift lengths fits a curve better than one uniform length, with long shifts giving cheap baseline coverage and shorter shifts adding precision over peaks without paying for the troughs around them. The sharpest tool for a midday hump is the short shift or split shift — a four-hour block dropped over the peak, or a split covering both humps, hugs the curve exactly where whole shifts overshoot. They’re fiddly and need willing staff, but they’re how you cover a peak without overstaffing the shoulders.

Breaks are a lever, and simpler is better

Breaks are part of the design, not an afterthought: pull everyone’s lunch to 1pm and you carve a hole in coverage exactly when you may need it, whereas spreading breaks across the off-peak shoulders keeps net coverage flat through the busy intervals. The constant tension is fit versus simplicity — more shift variety hugs the curve, but rosters get complex and staff dislike unpredictable patterns. The best design is the simplest one that covers the requirement; complexity is a cost to be justified, not a virtue in itself.