=+e. What is the best way to staff a security checkpoint if management wants to limit the number Processing time Ticket X-ray Metal Number of Standard Test checkers machines detectors replicates Mean deviation 1 2 2 2 67 39.10 1.29 2 3 2 1 67 46.50 4.30 3 2 2 1 67 50.56 5.41 4 3 2 2 67 35.07 1.05 5 2 1 2 67 93.37 37.75 6 3 1 1 67 90.55 33.52 7 2 1 1 67 97.70 34.79 8 3 1 2 67 88.86 37.58