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Network Diagrams: Forward and backward pass

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Network Diagrams: Forward and backward pass

  1. 1. A 4 Project Networks C 3 B 8 D 2 E 3 F 10 A-B-D-F 4+8+2+10 = 24 A-C-E-F 4+3+3+10 = 20 ES ID EF SL LS DR LF
  2. 2. = Early Start ES Time-Related Task Properties = Early FinishEF = Late StartLS = Late Finish LF = Slack or FloatSL = DurationDR A Task = Early Start ES = Early FinishEF Forward Pass = Late StartLS = Late Finish LF = Slack or FloatSL Backward Pass
  3. 3. A Forward Pass: ES+DR=EF C B D E F0 4 4 4 12 12 14 7 7 10 10 14 14 24 Always Take Larger Number on Forward Pass 4 8 2 3 3 10 ES ID EF SL LS DR LF
  4. 4. A 4 Project Networks C 3 B 8 D 2 E 3 F 10 0 4 4 4 12 12 14 7 7 10 10 14 14 24 A-B-D-F 4+8+2+10 = 24 A-C-E-F 4+3+3+10 = 20 ES ID EF SL LS DR LF
  5. 5. A Backward Pass: LF- DR=LS C B D E F0 4 4 4 12 12 14 7 7 10 8 4 14 24 Always Take Smaller Number on Backward Pass 4 8 2 3 3 10 2414 1411118 1412124 40 ES ID EF SL LS DR LF
  6. 6. A C B D E F0 4 4 4 12 12 14 7 7 10 8 4 14 24 Always Take Smaller Number on Backward Pass 4 8 2 3 3 10 2414 1411118 1412124 40 Backward Pass: LF- DR=LS ES ID EF SL LS DR LF
  7. 7. A Backward Pass: Slack C B D E F0 4 4 4 12 12 14 7 7 10 14 24 4 8 2 3 3 10 2414 1411118 1412124 40 0 0 0 0 44 Slack or Float = LS - ES ES ID EF SL LS DR LF
  8. 8. A C B D E F0 4 4 4 12 12 14 7 7 10 14 24 4 8 2 3 3 10 2414 1411118 1412124 40 0 0 0 0 44 Completed Project Network ES ID EF SL LS DR LF

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