Work with your fellow employees to understand how they enter data so you can determine the best way to present their choices; they won't forget who's responsible for their improved accuracy and speed, particularly around performance appraisal time. Of course, you'll also earn your own manager's gratitude once you're no longer wasting time fixing preventable errors.
Hart, Geoffrey J.S. Geoff-Hart.com (1999). Articles>Usability>Databases>EPSS