Consultative Sales methods like SPIN Selling, Action Selling and other world class sales methodologies are important not only for the sales team, but for actually the whole company.
One of the top management consultants had once mentioned – how many sales people should be there in a company. As many as the No. of staff that the company has.
It means that each and every person, whatever is the role, has to think from the customer perspective also, al the time.
It would be a good idea to have key people from all the departments trained and exposed to such thinking.