Vassilis Agouridas Alison McKay Henri Winand Alan de Pennington Advanced product planning: a comprehensive process for systemic definition of new product requirements. 19-48 2008 13 Requir. Eng. 1 http://dx.doi.org/10.1007/s00766-007-0055-z db/journals/re/re13.html#AgouridasMWP08