It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Melnyk & Fineout-Overholt (2015, p. 10), Step 5 = "Evaluate outcomes of the practice decision or change based on evidence".
At this stage of the EBP process, you should be looking at how well you did with each of the previous steps. Murray Turner at the University of Canberra has provided a neat checklist of questions that you can ask yourself. Please note that Steps 2, 4, and 4 have different names but the meaning remains the same.