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Verifying structure design > Modifying process plan data

Understand the Gantt

The Process Gantt view displays processes and operations and the relations between them in a chart. A process Gantt chart is a bar chart that illustrates the work breakdown structure of a project. It illustrates the start and finish times of the operations or processes, or the relationships between those start and finish times if they overlap, as well as summary elements (operations or higher level processes) of the project using a time line. The Gantt chart also shows the dependency (sequence) relationships between the elements.

Using the Process Gantt view, you can:

  • Configure the view using preferences.

  • Change the time duration of elements.

  • Reset the scope (structural selection) of the Gantt view, or otherwise modify the view.

  • Create and delete flows.

  • Show and hide the critical path (sequence of processes/operations that defines the longest path of the project).

  • Expand and collapse structures within the chart.

  • Set the calculated duration time (the overall time it takes to execute a process's or operation's direct children) in the chart, and propagate the allocated (allowed) time from the calculated (perceived) duration.

  • Set cycle time and display time units as red lines in the chart.

  • Use wrapped cycle time to show that even though a task exceeds its assigned cycle time, it can still be completed in time for the next task to begin.

  • Set custom colors to better identify resources assigned to processes in the chart.

Note the following about the Process Gantt view.

  • The duration of an element in the Gantt chart represents its allocated time. You can also set the allocated time in the Time view.

  • You cannot set start times manually in the Process Gantt view. Start times are calculated based on previous processes or operations.

  • To help you avoid making inadvertent changes to activity durations, the Process Gantt view is locked in edit mode when you first open it. You must unlock this mode by clicking before you can modify duration times by dragging the time bar.

  • If objects are configured out in the initiating process structure, the Gantt chart ignores them.

  • You can drop a process into the Gantt chart; the behavior is identical to dropping it in the same position in the structure view.

  • When you select a process or time element in the Process Gantt view, the same process is selected in the structure view.

  • You cannot delete a process that has flows attached to it.

Source: https://docs.sw.siemens.com/en-US/doc/282219420/PL20251212545240207.pmphelp/id772660 · retrieved 2026-07-11