The APQP and Control Plan manual is controlled by the AIAG (Automotive Industry Action Group). The AIAG is an organization set up to ‘coordinate’ certain aspects of the ‘big three’s’ needs. For the best understanding of the full role of the AIAG in this play, go to their web site: http://www.aiag.org/interest_areas.html
As a reminder, the APQP methodology is a Ford, GM and Chrysler requirement. Although Honda, Toyota, BMW, and other car makers have a similar process which they employ to ensure the same goals, the APQP and Control Plan manual has nothing to do with their systems.
Toyota is an example of a company which uses a somewhat different process to achieve the same goals. It is called the Toyota Production System and companies world wide have adopted Toyota’s approach. I see advertisements for employees regularly which cite a requirement for, or a preference for, Toyota Production System experience.