Developing reliable software is a complex task which is becoming even more challenging as customers put overwhelming demands on software companies to produce high quality products in shorter time frames. Scrum is an agile, lightweight software development process that can be used to manage and control software projects using iterative, incremental practices. Scrum aims to increase productivity and improve quality in complex environments. Experts claim that this is a simple process whose aims are effortlessly achieved. The reality is that successful implementation is far from easy and requires significant training and plenty of practice. The case study presented in this paper investigates the use of Kotter's Change Model to support the implementation of Scrum in a software company. © Springer-Verlag Berlin Heidelberg 2008.