# Expected CRFs and common forms

In the Data Viewer, common forms require some special handling in the calculation of Expected CRFs.

- A common form can appear in multiple non-common visits in the current study version.
- Each non-common visit can be scheduled, unscheduled, dynamic, or repeating.
- In each non-common visit, the common form can be dynamic.

  Note: A common form can be dynamic in multiple visits and not dynamic in other visits. For the visits in which it is dynamic, it might be activated in some, but not others.

- If a common form is started, it is counted as Expected.
- A non-started common form is counted as Expected if the following two conditions are both met in at least one non-common visit in the current study version:
  - The visit is expected to have started.
  - The common form is not dynamic in the visit, or the common form is dynamic in the visit and the common form is activated (and not deleted) in that non-common visit.

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