Running the impact analysis engine

The workflow that you use to direct a change automatically runs the impact analysis engine if the corresponding action is in the workflow. This occurs after all of the implementation tasks are created and targets have been specified for the tasks. The best practice PMCHGMAIN1 workflow, which is provided in this product for advanced changes, includes an action to run the impact analysis engine.

About this task

If you do not use a workflow to automatically invoke the impact analysis engine, or if you want to run an automated impact analysis before or after the point in the process when the workflow does so, you can run the engine manually. To do so, you use application actions; for more information, see "Calculating impacts manually."

You can manually instruct the engine to calculate impacts of individual tasks or individual target CIs. In addition, you can run the engine early in the Change process, before the assessment phase begins, to preview the scope of impacts that you can expect from a proposed Change.

  • Previewing the impacts of a Change
    After you create a Change with associated target configuration items (CIs), you can preview the impacts of the Change. Typically, you preview impacts immediately after creating a Change, so that you can identify a disruptive Change early in the process, before substantial work is performed. However, you can preview impacts at any time. For example, you might want to do so when you modify the list of targets for a Change, modify expected outages, and so on.
  • Calculating impacts manually
    You can calculate the impacts of all of the implementation tasks at any time during the Change process, before or after workflow triggers the automatic impact analysis. When you are performing an initial assessment of a Change, a list of potential impacts is very useful information. A Change Analyst who wants to obtain a quick idea of the scope of a Change can quickly see which CIs or assets are potentially impacted.
Parent topic: Conducting an impact analysis

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