Table 3.

Performance and validation KPIs and their definitions

KPI	Definition
Alternative tray percentage	The proportion of surgeries that had to be performed
	with replacement RMDs.
Reschedule percentage	The proportion of surgeries that are rescheduled due to RMD unavailability.
	A delay in availability of RMD sets of more than 2 hours
	results in a rescheduled surgery.
Total inventory level	The total number of trays in the tray inventory.
Average queue lengths	The average number of trays in the queue before the workstation or machine.
Number of charges	The number of disinfection machine or autoclave charges.
Total number of trays cleaned	The total number of trays that completed the full sterilisation
	cycle during the simulation run.