What role does evidence play in management of policy, programming, and/or project cycle?

Evidence plays the most important role in the world of management in the AUDIT phase.

Without evidence we ca not achieve the audit process.

An evidence is a fact. There are no arguments against facts.

evidence is very important thing for monitoring in general, to take an action depend on real evidence, and when someone make audit on you and say why do you that action?

I agree with Francisco, presenting facts is essential in achieving any success