As you can guess, I love data. I love data because they are the basic facts about your business that can be used to support your decision-making process. However, and being an analyst professional you may think this is hard for me to say, data can be used to make bad decisions. Data may not be accurate due to systemic issues within the data collection process, and/or the results of a report or analysis may be misinterpreted. One way to mitigate the latter problem is with the usage of control limits.