En sidan operation forudsætter endvidere et snævert samarbejde mellem producenten og de godkendte forhandlere, som for deres del har behov for præcis information for at kunne tilbyde den endelige forbruger den forventede professionelle rådgivning.
The success of such an operation presupposes close cooperation between the manufacturer and its authorized retailers, who, for their part, require specific training in order to provide final customers with the professional advice they expect.