Research Article

Facility Location with Tree Topology and Radial Distance Constraints

Table 4

Numerical results for and .

#CPU (s)CPU (s)CPU (s)CPU (s) (%) (%)

Instances using radial coverage of 0.2 km
156.202317.5547.633.4356.201912.8455.034.9615.252.08
263.831920.6454.633.3463.831812.8763.264.1814.410.89
384.283619.5573.404.1684.283818.4783.155.1912.911.35
485.135323.6575.253.8785.132212.0484.794.4511.610.40
5105.2417332.4690.414.46105.2410824.52104.145.1414.091.04
649.8175245.3935.8521.8449.8174210.4347.9744.4928.033.69
756.9587292.4140.2122.4956.9554154.2855.1652.5429.393.14
867.0114231086.1347.2923.9667.0114821132.8064.4664.9629.433.80
976.6252278.2256.2923.2076.6276255.9174.4939.2226.532.78
1093.8761303.9268.4728.5593.8748233.5991.9392.7927.052.06

Instances using radial coverage of 0.5 km
199.83513.9946.173.1499.83011.7696.614.7653.753.23
2122.36012.3662.683.59122.36011.98121.365.1948.780.82
3138.68010.8670.693.70138.68010.98138.036.1349.030.47
4163.482116.6677.244.20163.48917.10158.5820.1452.752.99
5201.94012.8798.404.70201.94012.95201.229.7351.270.35
697.200308.2135.7422.2597.200211.7596.1498.7563.231.09
7116.6515342.0944.5722.49116.656265.36113.68101.1061.792.54
8131.500302.7446.5823.84131.500223.71130.60208.2364.580.69
9157.349331.8359.7825.56157.344339.99154.90185.6262.001.55
10192.2714386.2168.0427.69192.277374.94189.23293.4564.611.58