Fig. 4

(A) Histograms of total costs of 10,000 days of service simulated with double overbooking, 1 (one) overtime resource and costs at baseline level (probabilities of IPs and EPs – baseline level); (B) Histograms of total costs of 10,000 days of service simulated with double overbooking, 2 (two) overtime resources and costs at baseline level probabilities of IPs and EPs – baseline level)