Hi Andrea,
"Time to complete" is a date field to trigger the computation of the knowledge analyst work order. Let me explain
here...when a comment is logged, if the comment type is "general comment", this comment will show up in the KT document "comments" session right away; if the comment type is not "general comment"(like "incorrect information", "missing information" etc) , then a "notification" will automatically send to the document owner thru the scoreboard node
knowledge documents->follow-up comments->my follow-up comments->Open, with the "target date" computed as
now+"time to complete" from the comment type(3 days, 7 days etc), this way the knowledge manager/analyst can work on the comments in this node according to the "target date" of the comments and once the comment is closed, it is considered a closed comment and will move to the "Close" node of the KT manager/analyst. This is basically how the "time to compete" is used but unfortunately I couldn't find any doc explain this usage. And from what I said here you can see there is no email notifications so far and if you want email notifications for the comment's lift cycle, you can use
Follow-up Comment closed
New Follow-up Comment
Follow-up Comment assigned
activity notifications. These activity notifications are self explained.
Hope this helps.
Thanks
Chi
PS. as there is no public doc on this I am going write a new one