Safety and security are top priority in mission-critical software-intensive systems whose every security and safety risk poses disastrous consequences. Systems built with significant vulnerabilities are difficult and expensive to fix, and the solution is to make safety and security a part of the requirements process. Yet most requirements engineers, safety engineers, and security engineers do not share a common language to effectively collaborate. This book allows requirements, safety, and security professionals can work together to integrate their expertise ensuring safety and security is built into systems. Filled with examples, this book provides a practical process for identifying, reusing, and managing requirements.