Calculating Float.pps

Calculating FloatActivity Start D A F E G B H C End Start Start D, A D F, E F G H C, B Precedence Duration 0 4 6 7 8 5 5 7 8 0 BEST VIEWED IN SLIDE SHOW MODE 1. What is the duration of the critical path? A) 32 B) 33 C) 31 D) 35 2. What is the float of activity B? A) 0 B) 16 C) 10 D) 15 3. What is the float of Activity F? A) 0 B) 5 C) 13 D) 7 ™ qvive.biz Forward Pass (ES  EF) 4. Backward Pass (LF  LS) Q 1 2 3 A qvive. Precedence Diagram 2. Critical Path 5.biz . Float of Critical Path Activities 6. Durations 3.Calculating Float BEST VIEWED IN SLIDE SHOW MODE Start “A” “F” “B” End “D” “E” “G” “H” “C” ES D EF “X” LS F LF 1. Critical Path 5. Precedence Diagram 2.biz . Backward Pass (LF  LS) Q 1 2 3 A qvive. Forward Pass (ES  EF) 4. Durations 3. Float of Critical Path Activities 6.Calculating Float Start “A” “F” “B” End “D” “E” “G” “H” “C” ES D EF “X” LS F LF 1. Durations 3. Float of Critical Path Activities 6. Forward Pass (ES  EF) 4.biz .Calculating Float 6 7 5 Start “A” “F” “B” End 4 8 5 7 8 “D” “E” “G” “H” “C” ES D EF “X” LS F LF 1. Critical Path 5. Backward Pass (LF  LS) Q 1 2 3 A qvive. Precedence Diagram 2. Float of Critical Path Activities 6.Calculating Float 0+6=6 0 6 6 6 7 13 13 5 18 Start “A” “F” “B” End 0 4 4 4 8 12 13 5 18 18 7 25 25 8 33 “D” “E” “G” “H” “C” The latest Late Finish of the preceding activities determines Early Start ES D EF LF “X” F 1. Critical Path 5. Forward Pass (ES  EF) 4. Backward Pass (LF  LS) Q 1 2 3 A qvive. Precedence Diagram 2. Durations 3.biz . Precedence Diagram 2. Float of Critical Path Activities 6. Durations 3.Calculating Float 0 6 6 6 7 13 13 5 18 Start “A” “F” “B” End 0 4 4 4 8 12 13 5 18 18 7 25 25 8 33 “D” “E” “G” “H” “C” The latest Early Finish of the preceding activities determines Critical Path ES D EF “X” LS F LF 1. Critical Path 5. Forward Pass (ES  EF) 4. Backward Pass (LF  LS) Q 1 2 3 A B qvive.biz . biz . Durations 3. Backward Pass (LF  LS) Q 1 2 3 A B A qvive.Calculating Float 0 6 6 6 7 13 13 5 18 Start “A” 0 “F” 0 “B” End 0 4 4 4 8 12 13 5 18 18 7 25 25 8 33 “D” “E” “G” 0 “H” 0 “C” 0 Activities on the Critical Path have Zero Float ES D EF “X” LS F LF 1. Float of Critical Path Activities 6. Precedence Diagram 2. Forward Pass (ES  EF) 4. Critical Path 5. Float of Critical Path Activities 6. Backward Pass (LF  LS) Q 1 2 3 A B A qvive. Durations 3.biz . Precedence Diagram 2. Forward Pass (ES  EF) 4.Calculating Float 0 6 6 6 6 6 7 13 13 13 5 18 Start 0 “A” 0 “F” 0 “B” End 0 4 4 4 8 12 13 13 5 18 18 18 18 7 25 25 25 25 8 33 33 “D” “E” “G” 0 “H” 0 “C” 0 Activities on the Critical Path have LS=ES and LF=EF ES D EF “X” LS F LF 1. Critical Path 5. Float of Critical Path Activities 6. Precedence Diagram 2. Backward Pass (LF  LS) Q 1 2 3 A B D A qvive.Calculating Float 0 6 6 6 6 6 7 13 13 13 5 18 Start 0 “A” 0 “F” 0 “B” 28 15 33 33 – 5 = 28 28 – 13 = 15 18 18 7 End 0 1 4 4 5 4 5 8 12 13 13 13 5 18 18 25 25 25 25 8 33 33 “D” 1 “E” 1 “G” 0 “H” 0 “C” 0 The earliest Late Start of the following activities determines Late Finish ES D EF “X” LS F LF 1. Critical Path 5. Durations 3.biz . Forward Pass (ES  EF) 4. Forward Pass (ES  EF) 4. Float of Critical Path Activities 6. Backward Pass (LF  LS) Q 1 2 3 A B D A qvive. Durations 3. Critical Path 5.biz . Precedence Diagram 2.Calculating Float 0 6 6 6 6 6 7 13 13 13 5 18 Start 0 “A” 0 “F” 0 “B” 28 15 33 End 0 1 4 4 5 4 5 8 12 13 13 13 5 18 18 18 18 7 25 25 25 25 8 33 33 “D” 1 “E” 1 “G” 0 “H” 0 “C” 0 What else can we learn from this example? ES D EF “X” LS F LF 1. Calculating Float 0 6 6 6 6 6 7 13 13 13 5 18 Start 0 “A” 0 “F” 0 “B” 28 15 33 End 0 1 4 4 5 4 5 8 12 13 13 13 5 18 18 18 18 7 25 25 25 25 8 33 33 “D” 1 “E” 1 “G” 0 “H” 0 “C” 0 Project has increased RISK because of a Near-Critical Path ES D EF “X” LS F LF 1. Backward Pass (LF  LS) Q 1 2 3 A B D A qvive. Critical Path 5. Precedence Diagram 2. Float of Critical Path Activities 6. Forward Pass (ES  EF) 4.biz . Durations 3.