Some clients have requested the ability to customize how statuses are summarized. For instance, You may want to set other statuses (such as 'Omit') to be treated like N/A and be ignored by the summary. Or you may want to use a custom status to represent a final approval, and set it to contribute to a 'Final' summary rather than 'In Progress.'
Click 'Me Too!' to vote up this feature, and add any additional thoughts or use cases in the comments.