DataSet 1 --------- Field data from a large release of a telecommunications switch software. Date is calendar-time. Format: Column1: Date Column2: %Cum SW Failures Column3: %Cum Usage Time Column4: %Sites %Cum SW Failures is the percentage of the total number of software failure experienced in the calendar interval reported in the table, %Cum Usage Time is the percentage of the total in-service time accumulated over the calendar interval reported, and %Sites is the percentage of sites that have this version of the software release loaded on a given date. Note that the data set has been normalized to protect proprietary information. ----------------------------- Column1: Date Column2: %Cum SW Failures Column3: %Cum Usage Time Column4: %Sites ----------------------------- 0 0 0.0 2 1 1 0.1 2 2 1 0.1 2 3 1 0.1 2 4 1 0.1 2 5 1 0.2 2 6 2 0.2 3 7 2 0.2 3 8 2 0.3 4 9 2 0.3 5 10 2 0.4 5 11 3 0.4 6 12 4 0.5 7 13 4 0.6 7 14 5 0.7 9 15 7 0.8 13 16 7 1.0 16 17 8 1.1 16 18 9 1.5 17 19 10 1.7 19 20 10 2.0 22 21 11 2.2 25 22 13 2.6 29 23 14 2.9 33 24 16 3.3 37 25 17 3.8 41 26 18 4.3 46 27 20 4.8 49 28 22 5.4 54 29 25 6.1 56 30 26 6.7 60 31 28 7.4 63 32 30 8.2 65 33 32 8.9 67 34 33 9.7 69 35 35 10.5 70 36 35 11.4 73 37 38 12.2 75 38 39 13.1 76 39 40 14.0 78 40 42 14.9 81 41 44 15.8 83 42 45 16.8 85 43 47 17.8 86 44 49 18.8 88 45 50 19.8 90 46 52 20.9 92 47 54 21.9 94 48 55 23.0 95 49 56 24.1 96 50 57 25.2 96 51 58 26.3 95 52 59 27.4 95 53 60 28.5 95 54 60 29.6 96 55 63 30.7 98 56 64 31.9 98 57 65 33.0 99 58 66 34.1 99 59 67 35.3 99 60 69 36.4 99 61 70 37.6 99 62 70 38.7 99 63 72 39.9 100 64 73 41.0 99 65 74 42.1 99 66 75 43.3 99 67 76 44.4 99 68 77 45.6 100 69 77 46.7 100 70 77 47.9 99 71 79 49.0 98 72 79 50.2 97 73 80 51.3 95 74 81 52.4 95 75 82 53.4 93 76 83 54.5 91 77 83 55.5 90 78 84 56.6 89 79 85 57.6 88 80 85 58.6 85 81 86 59.6 82 82 86 60.5 80 83 87 61.4 78 84 87 62.3 78 85 88 63.2 76 86 88 64.1 75 87 89 64.9 74 88 89 65.8 72 89 90 66.6 71 90 90 67.4 71 91 90 68.2 69 92 91 69.0 68 93 91 69.8 67 94 92 70.5 65 95 92 71.3 64 96 92 72.0 63 97 92 72.7 62 98 93 73.4 61 99 93 74.1 61 100 93 74.8 60 101 94 75.5 59 102 94 76.2 59 103 95 76.9 58 104 95 77.5 57 105 95 78.2 56 106 96 78.8 54 107 96 79.4 53 108 97 80.0 52 109 97 80.6 50 110 97 81.2 48 111 97 81.7 48 112 98 82.3 47 113 98 82.8 46 114 98 83.3 45 115 98 83.9 45 116 98 84.4 45 117 98 84.9 42 118 98 85.3 40 119 98 85.8 39 120 98 86.3 38 121 98 86.6 38 122 98 87.1 37 123 98 87.5 37 124 98 87.9 36 125 98 88.3 36 126 98 88.7 35 127 99 89.1 34 128 99 89.5 34 129 99 89.9 33 130 100 90.3 32 131 100 90.7 31 132 100 91.0 30 133 100 91.4 30 134 100 91.7 29 135 100 92.0 28 136 100 92.3 27 137 100 92.7 27 138 100 93.0 25 139 100 93.2 25 140 100 93.5 24