A simple, but effective way of doing this is with the 5Y Analysis technique. You can find out more about the 5Y technique here: 5Y Analysis
By repeatedly asking the question “Why” (five is a good rule of thumb), you can peel away the layers of symptoms which can lead to the root cause of a problem.
In this scenario, we have a common problem experienced by many marketing leaders and their teams; Marketing campaigns are not being supported by sales.
To address this here is a common series of 'Why's' that could apply to your business:
If you can be really honest, you'll come up with a logical solution to your issue.
Using the example above, it can be said that the solution to this is that Sales and marketing need to be unified. Sales and Marketing need to outline the campaign objectives together and design a Service Level Agreement (SLA) of how each will support the other.