Queue	arrival rate/min	service time (min)	servers	residence time (min)	rho	C
	sign-in	0.2000	1.0000	1	1.2500	0.2000	0.2000
	prep with nurse	0.1900	5.0000	2	6.4568	0.4750	0.3059
	blood test	0.0627	7.0000	1	12.4755	0.4389	0.4389
	doctor	0.1900	10.0000	3	13.6232	0.6333	0.3985
	time in system (average, min)				24.24
	patients in the building (average)				4.85
	To explore this model, try a couple of types of changes
	1. The system arrival rate is in cell C15, patients/min arriving at the sign-in table - gradually increase this toward 0.315789
	2. Add servers in cell E18 (these correspond to additional doctors)
	NOTE: negative residence time means that utilization (rho) exceeds 1; that is, the queue is unstable