Davie Weir believes the lack of a scouting network at Rangers is a problem that needs to be solved.
Hull City have confirmed they have rejected a third bid from Norwich City for winger Robbie Brady.
Rigg joined the Barclays Premier League strugglers from Manchester City last season to renew his partnership with then Rangers boss Mark Hughes.
But following Harry Redknapp's appointment as Hughes' successor last month the club have opted for a further change.
They confirmed Rigg's departure in a brief statement on their website that said: "Queens Park Rangers Football Club can confirm that it has been agreed that Mike Rigg will leave his position at Loftus Road."