If possible, choose an example story that relates to an aspect of the new position, as this may add significance to the interview. Consider a time you improved an individual responsibility or group function of a similar role. Or if you don't have relevant industry experience, you can relate an example of improving a personal process, like creating a more effective study schedule. As you communicate your experience, explain why you think it's important to think analytically about existing processes and how to improve them. Add details to help make your story clear and understandable.