TimeLine

Dependencies and Predecessors

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Reference for predecessor syntax, relation types, lags, multiple predecessors, and Task ID usage.

The Predecessor column stores task dependencies as text expressions that reference Task ID values.

The basic syntax is TaskIDRelationLag. Examples:

1FS means this task starts after task 1 finishes.
1FS+2d means this task starts two working days after task 1 finishes.
3SS means this task starts when task 3 starts.
4FF-1d means this task finishes one working day before task 4 finishes.

Supported relation types are:

FS Finish-to-Start
SS Start-to-Start
FF Finish-to-Finish
SF Start-to-Finish

If the relation type is omitted, TimeLine treats the predecessor as FS. For example, 1 works like 1FS.

Lag units are h for hours, d for days, m for months, and y for years. If the lag unit is omitted, TimeLine uses the Gantt duration unit as the fallback.

Multiple predecessors can be separated with commas or semicolons, such as 1FS, 2SS+1d.

Keep Task ID stable. Dependencies point to Task IDs, not row numbers visible in the WBS margin.

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Typed predecessors

The Predecessor column stores expressions such as 1FS, 3SS, and 4FF while the chart draws the resulting links.

TimeLine schedule with linked Gantt tasks and predecessor values.

Different link types

A structured schedule can combine FS, SS, and FF relations depending on how tasks overlap.

TimeLine schedule showing predecessor expressions and multiple link types.

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