Both time-to-market and flexibility are becoming more and more important in today’s software development, especially when heading for web-based information systems. Traditional processes focus on detecting errors early, because they assume that changing existing software is expensive. Agile software development uses a different strategy: The team is organized to facilitate the design of changeable software. Tight relations to the stakeholders and short feedback cycles enable the team to put the software into production faster and react to changing requirements more flexible.