Would you invest highly in training front end staff who are the face of your business or provide basic training and let them learn whilst on the job?

The staff those are the face of business they make the market by creating image of company by there work. vendors and customer react on the image of company 

That is it is risky for business to allowed window person to learn by there mistake , there mistakes can damage a lot.

As per my openion company have to invest in training faces of company