This book addresses the development of safetycritical software and to this end proposes the SafeScrum R methodology. SafeScrum R was inspired by the agile method Scrum which is extensively used in many areas of the software industry. Scrum is however not intended or designed for use with safetycritical systems hence the authors propose guidelines and additions to make it both practically useful and compliant with the additional requirements found in safety standards. The book provides an overv