What is your obstruction procedure?

[5 sport ref]

We were at a tournament yersterday and we had two schools of thought on the proper procedure when a player is called out before the base(s) are awarded. School one - signal obstruction, make the call, call time, and then award the base(s) the runner would have gotten had there been no obstuction. School two - signal obstruction, at the end of playing action,no call is made, call time and make base awards . The difference being do you or do you not make an out call before calling time and awarding the base(s).