There are lots of consultative methods focused on selling solutions. They all have at least one thing in common. They try to help salesmen to focus on what matters to the customer by demonstrating that you are delivering an important solution to an important problem.
That is the essence of all these consultative methodologies - to sell solutions.
Make sure your salespeople uncover the answers, make sure every proposal and sales presentation is based on them, and you'll win a lot more business.