what standard? what quality management system?

what quality system?
 
So what quality system should you choose?  The one that is right for your company (and then perhaps for your customers and then your suppliers).  But at the end of the day, it must be the very best management tool for your company to enable it to achieve desired business outcomes.
 
There are many models you can choose to design a quality management system around, in fact there are many thousands of templates available to use as a starting point, but they should only be used as a starting point and then modified to suit the corporate culture and commercial risk exposure of the market sector the company operates within.
 
Simple!