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Table 2 Statistics for the MdO (man hours required for repair) of several components

From: Scheduling the repair of aircraft components - a case study

Aircraft component N Mean Lower Median Upper Trimean Trimmed Trimmed Standard Coefficient
    quartile (Q 1) (Q 2) quartile (Q 3) \({\frac {Q_{1}+2Q_{2}+Q_{3}}{4}}\) mean (25 %) mean (5 %) deviation of variation
(a) Valve Ckeck (HTE400115) 12 5 3.51 5.03 6.41 5 4.98   2.28 0.46
(b) Valve control wing anti-ice (SAS911-002A) 72 11 5.19 7.47 14.36 8.62 9.2 10.96 10.25 0.9
(c) Flow control valve (1303A0000-04) 79 14 7.33 11.7 17.74 12.12 12.42 13.36 10.54 0.76
(d) Valve engine anti-ice (324195-1) 16 25 6.46 25.85 34.89 23.26 22.07   21.85 0.86
(e) Valve starter shutoff (3290064-17) 46 13 5.64 12.19 18.73 12.18 11.95 12.72 9.1 0.7
(f) Valve starter shutoff (3290064-20) 88 14 6.65 12.26 17.38 12.13 12.18 13.14 10.76 0.77
(g) Valve starter shutoff (3291556-3) 14 10 7.64 9.19 11.05 9.26 9.79   5.1 0.49
(h) Thermostat control temperature (342B040000) 65 6 0.75 1.5 11.75 3.88 4.67 6.02 7.64 1.21
(i) Auxiliary power unit (3800278-4) 25 15 6.08 10.93 17.57 11.38 11.44 15.49 19.27 1.24
(j) Actuator (65-20892-13) 82 9 1.65 8.7 13.89 8.24 8.28 8.67 7.42 0.82
(k) Bleed pressure regulating valve (6714D070000) 10 22 5.55 12.62 41.66 18.11 20.91   19.46 0.89
(l) Bleed pressure regulating valve (6774E010000) 87 4 0.75 3.14 5.73 3.19 3.36 3.97 4.16 0.99
(m) Exchanger heat (753A0000-03) 11 24 5.62 9.94 42.69 17.05 21.28   22.33 0.93
(n) Element filter (856504-5) 10 3 2.12 2.83 3.58 2.84 3.05   2.11 0.64
(o) Valve pneu press regulator (898626-3) 11 38 14.95 22.97 49.65 27.63 30.67   37.77 0.98
  1. N is the sample size