Developers dive to business context. How and, especially, why business analyst need to do this

Often, outsource development teams are separated from the business of a customer. 
People are jumping from one project to other, just closing tasks in a tracker, caring little about sense of what they are doing and value of their work.

In small and simple projects that are really not so important, but if that's a long project in the complex business domain, business context deep dive for developers can provide solution of solid increasing in quality and value for the customer. And sometimes even save the project from failure.

In my presentation, we will talk about issues that project can suffer without such business dive, how we can do this as analysts and what benefits the project can obtain from such dive and why the business analyst only can do this.