The ability to have an automated, visual comparison between two revisions or versions of a document is useful in the following work processes.
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When downstream disciplines evaluate the quantity and nature of design changes introduced with a new issued revision of a design document, this information can be helpful in ensuring all changes have been properly accounted.
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When a new revision of a document has been issued for review and approval, this information can be helpful highlighting all changes since the previous revision which can streamline the review process.