Over the past several years, agile software development has become an accepted method for developing software products. There have been questions from both manufacturers and regulators as to whether (or which) agile practices are appropriate for developing medical device software. Enough medical device manufacturers have implemented agile practices in their software development so that answers to these questions can be documented. Having clear guidance of which practices have been found to be appropriate will be very useful for all developers of medical device software. This TIR will provide recommendations for complying with international standards and U.S. Food and Drug Administration (FDA) guidance documents when using agile practices to develop medical device software.