Would you consider allowing hand washing to be optional in your organization? No.
What about optional use of aspirin for a heart attack patient? No.
We all understand the absolute necessity of following evidence-based medicine protocols for providing good clinical care and are usually very prescriptive in what we do on the clinical side of our business. What about in leadership? Is the use of evidence-based leadership techniques mandatory in your organization? Do you require peer interviewing and 30- and 90-day questions to reduce turnover?