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Task Relationships
A
4
B
8
Finish to Start
Task B cannot start until A is finished
Example: “Painting walls” (Task B) can’t start until
“Install Drywall” is complete (Task A)
Task Relationships
A
4 B
8Start to Start
Task B cannot start until Task A is started
Example: "Level concrete" (Task B) can't begin until
"Pour foundation" (Task A) begins.
Task Relationships
A
4 B
8Finish to Finish
Task B cannot finish until Task A is finished
Example: "Inspect electrical" (Task B) can't finish
until "Install electrical" finishes (Task A).
Task Relationships
A
4
B
8
Start to Finish
Task B cannot finish until Task A is started
Example: Your garden plants must be wet
when the fertilizer is applied. We need to
start “water the garden” (Task B) first to
get the plants wet. Task B must continue
and can only finish when the “Fertilizing”
starts (Task A).
Rare
Task Relationships +
Lags
A
4
B
8
Finish to Start
Task B cannot start until Task A is finished
Example: “Painting walls” (Task B) can’t start until 4
days after “Install Drywall” is complete (Task A)
+4d
0 4 8 16
1680 4
A
4 B
8Start to Start
Task B can start 2 days after Task A is started
Example: "Install Furniture" (Task B) can begin 2
days after "Install Carpet" (Task A) begins.
Task Relationships +
Lags
+2d
0 4
2 10
102
0

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Task relationships and lags

  • 1. Task Relationships A 4 B 8 Finish to Start Task B cannot start until A is finished Example: “Painting walls” (Task B) can’t start until “Install Drywall” is complete (Task A)
  • 2. Task Relationships A 4 B 8Start to Start Task B cannot start until Task A is started Example: "Level concrete" (Task B) can't begin until "Pour foundation" (Task A) begins.
  • 3. Task Relationships A 4 B 8Finish to Finish Task B cannot finish until Task A is finished Example: "Inspect electrical" (Task B) can't finish until "Install electrical" finishes (Task A).
  • 4. Task Relationships A 4 B 8 Start to Finish Task B cannot finish until Task A is started Example: Your garden plants must be wet when the fertilizer is applied. We need to start “water the garden” (Task B) first to get the plants wet. Task B must continue and can only finish when the “Fertilizing” starts (Task A). Rare
  • 5. Task Relationships + Lags A 4 B 8 Finish to Start Task B cannot start until Task A is finished Example: “Painting walls” (Task B) can’t start until 4 days after “Install Drywall” is complete (Task A) +4d 0 4 8 16 1680 4
  • 6. A 4 B 8Start to Start Task B can start 2 days after Task A is started Example: "Install Furniture" (Task B) can begin 2 days after "Install Carpet" (Task A) begins. Task Relationships + Lags +2d 0 4 2 10 102 0