Figure 1

Working load analysis of operation theater. Operating rooms (ORs) that were running at full-time (or greater than 49% workload) during various time shifts: between 8 am and 4 pm, four ORs were running; until 8 pm, two; and until 2 am, one. The yellow line designates the critical 49% workload, which cannot be exceeded for more than 9.25 hours in a 24-hour period. The orange line denotes the workday that extends beyond the 13-hour EDTW guideline. The red arrows indicate the 9.25-hour period of full-time work.