Activity Node O. M.L P Pred. Critical 62 ES EF LS LF Slack Design A 76 86 120 yes 90 7.3 53.8 0 90 0 90 Materials B 12 15 18 A no 15 1 1 90 105 95 110 Manufacture C 4 5 6 B no 5 0.3 0.1 105 110 110 115 Design revision D 15 18 33 G yes 20 3 9 129 149 129 149 0 Production run E 18 21 24 D no 21 1 1 149 170 149 170 Staff training F 16 26 30 A yes 25 2.3 5.4 90 115 90 115 Staff input 10 13 22 C,F yes 14 2 4 115 129 115 129 Sales training H 24 18 32 D no 21.3 1.3 1.8 149 170.3 149 170.3 0 Pre Advertise 22 27 50 A no 30 4.7 21.8 90 120 119 149 29 Post advertise 38 43 60 D, I yes 45 3.7 13.4 149 194 149 194 0