> ## Documentation Index
> Fetch the complete documentation index at: https://moengage.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Why Do the Failed Counts in the Campaign Stats Donut and the Error Breakdown Not Match?

> Campaign stats donut and error breakdown may show different failure counts in MoEngage because failures are calculated as Sent minus Delivered only.

## Problem

The failed numbers in the campaign stats donut and the error breakdown do not match.

## Explanation

* The formula used to calculate failures in campaign statistics is Sent minus Delivered (Sent–Delivered).
* The number of campaign errors could be higher due to various issues listed as *failed to send* according to the campaign's design.
* Even though these errors occur, the statistics team may not include them as actual failures.
* Those excluded errors could relate to a failure in personalization.