If you don’t believe checklists work, ask an airline pilot. Even the most tenured pilot has a checklist with detailed steps to start the engine, taxi, and take-off. And when the plane lands, they have a different set of checklists to get passengers safely to the terminal.
In fact, checklists are one of the reasons why air travel is among the safest forms of transportation. Assuming you believe that your organization’s mission is important and provides essential programs or services, shouldn’t you use an annual checklist?