Validate the business problem before validating the brand solution
Brand brief validation starts by checking whether the stated challenge is the real challenge. An inherited brief can reflect internal priorities, established beliefs or a particularly loud group of stakeholders, rather than the issue that needs solving. Begin with open questions about the business context, the forces shaping the situation and the assumptions behind the proposed response.
Then define the problem more precisely and design research around it. Internal stakeholder interviews should cover people at different levels, functions and locations, not only leadership. Ask where they see opportunity and challenge, what they believe customers need, what the brand is known for and where views diverge. Contradictory accounts are useful. They can reveal whether a perceived brand problem is actually rooted in employee experience, market change or an untested internal story.
Sources: Research is how we ask questions, listen and learn, The inside story: why your people shouldn't be just passengers on your brand journey