The secret of Sam Walton and WalMart is that he conducted hundreds of small tests every day. He measured the results and made changes based on those results. Sam did not create huge all compassing tests, rather he would move a product from one aisle to the other and record the difference. He discovered what worked and what did not work. He implemented what worked and discarded what did not. No lengthy evaluation phase, no committee reviews, something either worked or it did not. He tested, succeeded and failed, and implemented. Do not be afraid to test. Small tests are much better than huge ones. Great organizations have a culture where it is ok for everyone to test recipes, steps of service, menu and marketing placement. Give yourself and your team that freedom.
Test, Measure and Implement!