Once an asset or result record has been saved, it can be approved. On the Edit window you will see a button Approve and Save.
This will approve the record by the logged in user with their optional signature and date/time stamp associated to the approval.
Once the record has been approved, any additional modifications to the record will remove the approval. You can also select the Remove Approvals button if you would like to manually force the record into an unapproved state.
Any approval changes will appear within the asset/result history logs for clear visibility.