Transforming Junior Doctor On-Call Roster Design with a 98% Improvement in Fairness and Availability
Customer

Problem
Unfair medical rostering
TUH’s medical workforce team was responsible for creating medical on-call rosters for almost 90 junior doctors. The manual process of generating these quarterly rosters was complex and time-consuming, requiring at least 12 person weeks per year. There were also complex requirements and rules to consider which made ensuring roster fairness difficult and resulting in complaints from doctors. Three rosters were needed for 30 registrar (senior grade), 30 SHO (middle grade) and 26 interns (foundation grade) doctors, four times per year. Requirements included:
- Roster Fairness objectives to be met including even distribution of day, night, and weekend call shifts.
- Over 20 constraints included: avoiding consecutive weekends, ensuring required rest day gaps between call to meet European Working Time Directive (EWTD) regulations, doctors from the same specialty not on call on the same day or near same day, plus other specialty and consultant specific restrictions.
Solution
roster optimisation logic for fairer rosters

Results
Time to produce each roster reduced from weeks to minutes.
More accurate and fairer rosters.
Improved EWTD compliance.
Productivity of 12 person weeks per year.
Fast turnaround of last-minute roster changes.
Wider application to other disciplines (expanded to surgery and 160 doctors in total).
MedModus responsive managed service to help TUH during busy roster ‘seasons’.
Testimonial
Producing these rosters was a real headache for our department. The number of factors to consider made it time- consuming and prone to error. The automation of this process has resulted in fairer rosters with less errors and saved valuable HR time.