In the Lean Startup method, the role of the leader changes from being a Caesar that decides what stays alive, to building a company culture that encourages the innovation among the team. As the leader, it’s your responsibility to build the experimentation system.
The experimentation system is a culture in the company that is focused on fast building, deployment, and analysis. System, that makes testing the hypothesis easy and fast, for pretty much everyone in the team. It’s called a system because the entire company must be involved in it. When marketers want to test something in the product, they need a certain process in the company to make it happen.