Quality system used in General Motors, business and finance homework help

What quality system was used in Mary Barra’s (unexpected) opportunity? After deciding what quality system was used in http://fortune.com/2014/09/18/mary-barra-general-m…, then decide if you feel this was the proper quality system or if GM should have used a different system. According to these five approaches: http://sloanreview.mit.edu/article/what-does-produ… 400 words approximately with ORIGINAL work and references