Change Predecessor Relationships

What a planner means

Change predecessor relationships is Oracle Change predecessor relationships. It is Project, Activities, select the activity, Display Activity Details, Predecessors or Relationships tab, then Assign / double-click Relationship Type / double-click Lag / Remove. It is a command. It is not stored as its own table. It is not Add predecessor relationships, not Remove predecessor relationships, not Change successor relationships, not Assign Predecessors as its own command, not Link Activities, not Unlink Activities, not Edit relationships in the Gantt Chart, and not EPPM Configuring Predecessor Relationships copied onto Professional.

Oracle Change predecessor relationships (Professional):

1. "Choose Project, Activities."
2. "Select the activity whose predecessor relationship you want to change."
3. "Display Activity Details, then click the Predecessors or Relationships tab." Then four actions on that same step:

- "To add a predecessor, click Assign in the Predecessors tab or in the Predecessors area of the Relationships tab. Select the predecessor activity you want to add." - "To change a relationship type, double-click the appropriate Relationship Type field, then select a new relationship type." - "To change a lag time value, double-click the appropriate Lag field, then enter a new time value." - "To remove a predecessor, select the predecessor you want to remove, then click Remove."

Quote those. That how-to fetched prints no Comments, no Yes confirm, no relationship-type list, no lag unit, and no Select Project. Do not invent those on this how-to. Do not invent a menu item named Change predecessor relationships.

Add predecessor relationships is a different how-to. That page prints Assign + Close, Select Project for external, then Relationship Type / Lag / Comments. This change how-to does not print Comments or Select Project. See Assign Predecessors.

Remove predecessor relationships is a different how-to. That page is Remove → Yes, and names Go To. This change how-to prints Remove and does not print Yes or Go To. Do not collapse them.

Change successor relationships is a different how-to. Successors or Relationships tab. That page prints Successor tab (singular) and Successor Activity column. This page prints Predecessors tab. Do not collapse them.

Assign Predecessors is a different command. Edit > Assign > Predecessors opens the Assign Predecessors dialog. This how-to can click Assign from the tab; it is not the Edit menu command.

Link Activities / Unlink Activities are different commands. See Link Activities and Unlink Activities.

Edit relationships in the Gantt Chart is a different how-to. Oracle: "Double-click the line representing the relationship you want to edit." "Select a different relationship type." "Specify a new number of lag days." "Click OK." That is one drawn line, not the Predecessors tab. Edit relationships in the Activity Network is the Network counterpart.

Professional vs EPPM

Professional — the how-to above. Double-click Relationship Type / Lag. No Save on that page.

EPPM web — Oracle Configuring Predecessor Relationships: "Configure predecessor relationships to define lag or relationship type." Navigation Menu → Projects → Activities; select an activity → Relationships detail window; select a predecessor relationship; "Add or remove columns as needed"; "Select an option or enter a value for each field"; Save. That page fetched does not print double-click, Assign, Remove, or Comments. Do not copy Professional double-click / Assign / Remove onto EPPM. Do not copy EPPM Save / add-or-remove-columns onto Professional.

Primavera Cloud is a different product. Do not copy it here.

XER

The command is not an XER table. After it runs you see a changed TASKPRED row (pred_type, lag_hr_cnt, or a missing row if Remove). Oracle’s project XER map TOC has no CHANGEPRED / CHANGE_PRED / CHANGEPREDECESSOR table. Do not treat a changed TASKPRED as “the planner used Change predecessor relationships.” A Viewer cannot tell this command from Assign, Gantt edit, import, or EPPM configure.

See TASKPRED (Activity Relationships) and FS / SS / FF / SF + Lag (Planner Language).

Microsoft Project

Microsoft Change a task link: Gantt → double-click the Task Name → Predecessors tab → change Type, or set Type to (None) to delete. Lag is a different Microsoft page (Predecessors tab Lag column). That is not P6 Change predecessor relationships. Do not map them as the same command. Do not claim MPXJ writes a real MPP.

Don't

• Treat this as Add predecessor, Remove predecessor (Yes / Go To), Change successor, Assign Predecessors, Link, Unlink, or Gantt-line edit.
• Invent Comments, Yes, a type list, or Select Project on this how-to.
• Invent a menu item named Change predecessor relationships.
• Copy EPPM Save / Relationships detail window onto Professional, or Professional double-click onto EPPM.
• Invent a CHANGEPRED XER table, or reconstruct the command from a TASKPRED row.
• Map this to MSP Change a task link / Predecessors tab as the same command.
• Claim MPXJ writes a real MPP.