# Creating Visit Definitions & Subject Visits

With _Subject Visits_ in Veeva CTMS, study managers can define visits for a _Study_, allowing users to create and track visits and related source data verification (SDV) activities for a given _Subject_. This data is useful in [monitoring reports](/en/lr/42835/) and other study management reports.

## Components Supporting Subject Visits

Vault includes objects that represent the definition of different visits for a _Study_, as well as objects and fields that support actual instances of visits related to a given _Subject_:

### Objects

* **Visit Definition**: Design object for _Subject Visits_ at the _Study_ level. _Subject Visits_ occur over the course of a clinical trial, and can include screen visits, visits for each month, end of trial visits, and more.
* **Subject Groups**: Design object for _Subject Groups_ available for a _Study_. Admins can associate a _Subject_ to a _Study Arm_ defined for the _Study_.
* **Subject Visit**: Object storing _Subject Visits_ a _Subject_ has completed over the course of the clinical trial.

Admins must add the objects above to the _Study_ or _Subject_ [object page layouts](/en/lr/26387/).

### Fields

The objects above include the _EDC ID_ field to support the [CDMS and Clinical Operations Vault Connection](/en/lr/48805/).

This feature also adds the _Arm_ field on the _Subject_ object to allow study managers to associate _Subjects_ with _Subject Groups_.

## Defining Visits

Study managers can use the _Visit Definition_ object to define a standard set of _Subject Visits_ that subjects can attend during the course of a _Study_, for example, screening visits, baseline visits, per-week visits, or end of trial visits.

To create _Visit Definition_ records, navigate to the **Visit Definitions** section on the _Study_ record and click **Create**

## Creating Visits

After creating _Visit Definition_ records for a _Study_, you can create _Subject Visits_ records for a given _Subject_. _Subject Visit_ records track the visits that _Subjects_ complete over the course of the trial.

When manually creating _Subject Visits_, navigate to the **Visits** section on the _Subject_ record and click **Create**.

## Relating Subject Group to Subjects

After creating _Subject Group_ records, you can associate the _Subject_ record with one (1) or more of the _Subject Groups_ defined for that _Study_. 

## Related Permissions

The following permissions control the ability to define and create _Subject Visits_ and _Subject Group_ related to a _Study_:

| Type | Permission Label | Controls |
| :---- | :---- | :---- |
| Security Profile | Object: Visit Definition: Create | Ability to define _Visit Definitions_ for a _Study_. |
| Security Profile | Object: Subject Group: Create | Ability to define _Subject Groups_ for a _Study_. You must have Create on all object types for the _Subject Group_ object. |
| Security Profile | Object: Subject Visit: Create | Ability to create _Subject Visits_ that a _Subject_ completes. |
| Security Profile | Object: Subject: Edit | Ability to edit a _Subject_ record to associate a _Subject_ to a _Subject Group_. |