P6 Predecessors tab on activity EC1660. Two FS predecessors with lag 0: EC1640 Install Wiring and Cable, EC1650 Set Heat Pump.

Collection

Relationships & Logic

Relationships, lag, retained logic · 13 topics.

Predecessors are relationship rows (here FS, lag 0) on the activity. Not a look-ahead object.

Topics

13

  1. Assign Predecessors

    Assign Predecessors is Edit > Assign > Predecessors / Add predecessor relationships; not Assign Successors, Link, or Unlink

    Relationships & Logic
  2. Assign Successors

    Assign Successors is Edit > Assign > Successors or Details Assign; not Assign Predecessors

    Relationships & Logic
  3. Calendar Used for Relationship Lag

    Lag calendar option: pred / succ / 24-hour / project; default Successor

    Relationships & Logic
  4. Dissolve an Activity

    Dissolve an activity is Edit, Dissolve; joins preds to succs and removes the activity; not Delete or Unlink

    Relationships & Logic
  5. Dissolve Removes an Activity and Joins Its Predecessors to Its Successors

    Dissolve removes an activity and joins preds to succs; not Delete; no XER table

    Relationships & Logic
  6. FS / SS / FF / SF + Lag (Planner Language)

    FS/SS/FF/SF + lag/lead in planner language

    Relationships & Logic
  7. Lag Calendar, in Planner Language

    Lag calendar in planner language: option vs pred-calendar unit conversion

    Relationships & Logic
  8. Look-Ahead 21-Day / 3-Week Window

    21-day / 3-week look-ahead is a DD-anchored filter, not a P6 object

    Relationships & Logic
  9. Predecessors in Project / MSPDI vs P6 TASKPRED

    FS/SS/FF/SF + lag in Project / MSPDI vs TASKPRED

    Relationships & Logic
  10. Project Constraints vs P6 Constraint Codes

    ASAP…MFO and MSPDI ConstraintType 0–7 vs P6 CS_*

    Relationships & Logic
  11. Retained Logic vs Progress Override vs Actual Dates

    Retained logic vs progress override vs actual dates

    Relationships & Logic
  12. TASKPRED (Activity Relationships)

    Relationships: pred_type, lag; live 5670 TASKPRED FS/FF/SS

    Relationships & Logic
  13. Trace Logic

    Trace Logic is a selected-activity pred/succ view; not TASKPRED or Activity Network; no XER table

    Relationships & Logic
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