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For b lf 6 ls lf dur 6 2 4 lf 6 ls 4 dur 2 ls of d is

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For B: LF = 6. LS = LF - DUR = 6-2 = 4. LF = 6, LS = 4. DUR = 2. (LS of D is smaller than E). For A: LF = 3. LS = LF - DUR = 3-3 = 0. LF = 3, LS = 0. DUR = 3. (LS of C is smaller than B). Slack Calculation: For A: SL= LS - ES = 0 - 0 = 0. Free Slack for A: FS = LF - EF = 3-3 = 0. For B: SL= LS - ES = 4 - 3 = 1. Free Slack for B: FS = LF - EF = 6-5 = 1. For C: SL= LS - ES = 3 - 3 = 0. Free Slack for C: FS = LF - EF = 6-6 = 0. 3 3 B 5 1 Survey designe d 1 4 2 6 6 D 13 0 Data Collectio n 0 6 7 13 0 A 3 0 Contrac t Signed 0 0 3 3 E S ID E F S L Legend F S L S DUR L F
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HW 4 IE5541 Sunny Ahmed For D: SL= LS - ES = 6 - 6 = 0. Free Slack for D: FS = LF - EF = 13-13 = 0. For E: SL= LS - ES = 13 -5 = 8. Free Slack for E: FS = LF - EF = 15-7 = 8. For F: SL= LS - ES = 13 - 13 = 0. Free Slack for A: FS = LF - EF = 15-15 = 0. For G: SL= LS - ES = 13 - 6 = 7. Free Slack for A: FS = LF - EF = 15-8 = 7. For H: SL= LS - ES = 15 - 15 = 0. Free Slack for A: FS = LF - EF = 16-16 = 0. Critical Path: There are four paths. A-B-E-H, A-B-D-F-H, A-C-D-F-H and A-C-G-H. A-B-E-H duration = 3+2+2+1 = 8 days. A-B-D-F-H duration = 3+2+7+2+1 = 15 days. A-C-D-F-H duration = 3+3+7+2+1 = 16 days. A-C-G-H duration = 3+3+2+1 = 9 days. Therefore critical path is A-C-D-F-H. Red indicates critical path, green indicates non critical paths and yellow indicates non- critical slack. Contract signed Survey designed Target market ID Data collection Develop presentation Analyze results Demographi cs Presentation 0 2 4 6 8 10 12 14 16 18 A6-2. ID Description Predecessor Time A Survey None 5 4
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HW 4 IE5541 Sunny Ahmed B Soils report A 20 C Traffic design A 30 D Lot layout A 5 E Approve design B,C,D 80 F Illumination E 15 G Drainage E 30 H Landscape E 25 I Signing E 20 J Bid proposal F,G,H,I 10 A is the initial activity and are covered by node 1-2. Activity B is denoted by node 2-4, C by 2-3 and D by 2-5. B, C, D is burst activity from A. Since B, C, D all merge into E we use a dummy activity of 0 duration, called X, which connects C to B. Another dummy activity Y is used to
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