# Transformation Event Metrics


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Click the **Events** tab on your transformation page to view detailed metrics for the events processed by the transformation. It includes the following details:

- Total events ingested for transformation.
- Number of events dropped intentionally by the transformation (because of the transformation's logic). For example, if your transformation [allowlists]({{< ref "transformations/templates.md#allowlist" >}}) only `track` events with the name `Product Purchased`, any event that does not meet these criteria is dropped.
- Number of events dropped due to transformation errors.
- Number of events successfully transformed and forwarded for further processing.

## Filtering window

You can filter the above metrics by source, destination, and time period (past 2 hours, 1 day, 7 days, or 30 days).

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{{< image src="images/dashboard-guides/event-metrics/transformation-events.webp" alt="Events tab for transformations in RudderStack dashboard" >}}

## Event flow

An event flow graph highlights how events were transformed over the selected time period.

{{< image src="images/dashboard-guides/event-metrics/transformation-events-trend.webp" alt="Event trends for transformation" >}}

## Transformation errors

The **Transformation errors** section includes the following details:

| Column name | Description |
| :---| :----|
| Event type | Type of event, for example, `identify`, `track`, etc. |
| Event name | Name of the event in case the type is `track`. |
| Source | Source from where the event was ingested. |
| Destination | Destination where the transformed event was to be forwarded. |  
| Event count | Number of events dropped due to transformation error. |
| Last seen | Time since the event that caused the transformation error last occurred. |
| Status code | HTTP status code of the transformation error. |

{{< image src="images/dashboard-guides/event-metrics/transformation-errors.webp" alt="Transformation errors" >}}

### View transformation error details

{{< warning >}}
**Required permissions**

[Admins]({{< ref "access-management/member-management.md#member-roles" >}}) have full access to view the transformation error details.

[Members]({{< ref "access-management/member-management.md#member-roles" >}}) must have the [**Transformation Failure Samples**]({{< ref "access-management/policies-overview.md#pii-permissions" >}}) PII permission to see the transformation error details. Otherwise, they do **not** see the **Details** option next to the errors, as shown:

{{< figure src="images/dashboard-guides/event-metrics/transformation-error-details-2.webp" alt="Transformation error details" >}}
{{< /warning >}}

Click **Details** to see the error description and the payload that caused the error:

{{< image src="images/dashboard-guides/event-metrics/transformation-error-details.webp" alt="Transformation error details" >}}