We are promoting JIRA portfolio to our customers.
One of the questions we get most often is for reserving capacity for support. While planning the future, most customers reserve a certain percentage (for example 10% of) team's capacity for support of completed projects. This can be taken as reserving 1 out of 10 men in the team for support or reserving 10% of each man's time each week/month/period for support. Of course this percentage varies from team to team.
The question is: How can we integrate this kind of planning into JIRA portfolio?