I though that was only me, but I guess that in general the concept of CCP is not clear and we have a lot of work to do in this topic.
I guess we can justify wine and music if we make the correlation between stress and employee safety performance. Something like this: stress causes human errors which cause contamination of the product, misinterpretation and implementation of procedures. It has been demonstrated using scientific methods that this is the cause of errors at all steps of the manufacturing line. In conclusion, instead of controlling all processes is better to keep a few employees happy, and happiness can be obtained more efficiently with wine.
It may still not qualify as CCP, but it may get eventually included as a GMP or as a best practice for excellence in the Food & Beverages sector. 
Edited by Rodriguez-Gonzalez, 25 August 2014 - 01:30 AM.