Variance analysis
=================

.. index:: Variance analysis

A variance analysis helps you to identify differences between
actual and target. The table and the diagram show you and highlight
all parameter deviations from actual and target.

In order to do a variance analysis, do as follows:

- Activate the tab **General** and choose the preferred baseline from
  the drop down menu **Baseline**.

|image0|


- Select a previously saved baseline and select the menu item **Project > Baseline > Select**.

|image1|

- Click on the button **OK**.
- Select the menu item **Start > Activity views > Variance analysis**.
  The **Variance analysis** opens:

|image2|

The first row in the table lists the properties of the scheduled
activities and subprojects (TARGET), while the second row lists the
actual properties of the activities and subprojects (ACTUAL). Parameters
deviating from the baseline are marked in yellow.

**Note:** Detailed information about the variances can be obtained by
marking the activity in the table (see green arrow) and selecting the corresponding
tabs in the box Object properties.

**Only difference**

Select the menu item **Variance analysis Format > Show > Only difference**.
This option turns off all activities, where there is no difference. So you can get only relevant information to the Variance analysis.

|image3|

**Progress line of the project**

A progress line displays graphically deviations of the cutoff date that occurred
between the actual project status and the selected baseline and is displayed in the **Variance analysis**.

Ideally, a progress line accords with the marked cutoff dates and
runs vertically across the variance analysis. A progress line running
left from the cutoff date indicates a delay in the project course.

A progress line running right from the cutoff date, 
indicates that some activities of the project will be completed
earlier than scheduled.

In order to visualise the progress line of a project, select one of the
following menu items **Variance analysis > Progress line**

|image4|

-  **Start date**
-  **Finish date**

 
.. |image0| image:: ../images/control_gantt_analysis_project.png
            :alt: 
.. |image1| image:: ../images/control_gantt_analysis_menu.png
            :alt:
.. |image2| image:: ../images/variance_analysis.png
            :alt: 
.. |image3| image:: ../images/control_gantt_analysis2.png
            :alt:
.. |image4| image:: ../images/control_gantt_analysis_line.png