Principle
Return on Understanding
Tim Kilroy's core idea is that understanding is an agency's sales and marketing superpower. His site cites the figure that 70% of CMOs who fire their agency do so because they feel the agency does not really understand their business.
The agencies that win have deep insight into their client's market, strategy, org chart, budget and how success is felt and measured. The same principle drives the coaching: understand the agency before advising it.