Change Management is a part of Cloudaware CMDB. Any object from your inventory added into Cloudaware CMDB can be tracked in regard to changes.
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More about working with Salesforce Approval Processes is available here.
Field History Tracking
The section 'Changes History' under the tab 'Change Management' on an instance provides a quick way to view the instance lifetime change log. It is not as detailed as CloudTrail change log but is available on demand and does not require additional searching. For example, you can track any attribute of AWS EC2 instance (instance size change, a tag being applied, HIDS Status changed, etc).
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