# Update Capacity

This action allows you to build flows that update the capacity values on users associated with a [Queue](/kb/routing/queues.md). This allows you to control the available capacity for a user based on custom logic.

Capacity requires two values: a maximum and an amount used. `max - used` is the available capacity which is used for assignment.

There are two ways of using this action. You can either specify explicit values to use for capacity via `usedCapacityValue` and `maxCapacityValue` or you can "join" data from fields on the User via `usedCapacityValueField` and `maxCapacityValueField`. The "join" method will retrieve the values for the specified field from each User and copy them over to the custom object that associates the User with the Queue.

{% hint style="info" %}
The Users must already be associated with the Queue or they will be ignored.
{% endhint %}

## Inputs

| Name                   | Required | Type        | Description                                                                   |
| ---------------------- | -------- | ----------- | ----------------------------------------------------------------------------- |
| queue                  | Yes      | String      | The queue the users are assigned to                                           |
| users                  | Yes      | List\<User> | List of users to update capacity values for                                   |
| maxCapacityValue       | No       | Long        | Max capacity value for the user for the specified queue                       |
| maxCapacityValueField  | No       | String      | User field from which to retrieve max capacity value for the specified queue  |
| usedCapacityValue      | No       | Long        | Used capacity value for the user for the specified queue                      |
| usedCapacityValueField | No       | String      | User field from which to retrieve used capacity value for the specified queue |


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