Engineering and Sales : The Two which has Inter-relationship

As and engineering people I believe The streghtness between The Two field above. 

In engineering we make a Products or a Solutions for problem encountered, in sales we make a strategy to sale Products produced by engineering division. 

The Cross relation between the two will be apparent as soon as we talk about the purposes of the company. Apparently company has a purpose to sell their product / services as much as they can handle it. 

So that the clue become apparent here “sell”. If the engineering people insist that the most important part of the company is the engineering division because this is the hearth of customizing and making product ,the sales division will be soaking and boasting that the key elements of each company is selling what they made. 

The wise option is to join together as part of a team, or educate engineers so that they have such a sales perspective ?? 

Which one will be more effective over the other or we must combine the two,so the force will be even greater.