This textbook provides a comprehensive and well-structured introduction to the fundamentals, principles, and techniques of requirements engineering.  The book includes numerous real-world examples to illustrate all aspects of requirements engineering.

Part I Fundamentals and Framework.- 1 Motivation - 2 Requirements - 3 Towards Continuous Requirements Engineering - 4 TheRequirements Engineering Framework.- Part II System Context.- 5 Context and Context Separation - 6 Context Structuring Scheme.- Part III Requirements Artefacts.- Part III.a Goals.- 7 Fundamentals - 8 Documentation of Goals.- Part III.b Scenarios.- 9 Fundamentals - 10 Types of Scenarios - 11 Documentation of Scenarios - 12 Usage of Goals and Scenarios.- Part III.c Solution-Oriented Requirements.- 13 Traditional Perspectives of Requirements - 14 Object-Oriented Models.- Part IV Core Activities.- Part IV.a Documentation.- 15 Fundamentals of Documentation - 16 Documentation in Natural Language - 17 Structuring Textual Requirements - 18 Fundamentals of Conceptual Modelling - 19 Model-Based and Textual Requirements.- Part IV.b Elicitation.- 20 Fundamentals of Elicitation - 21 Elicitation Techniques - 22 Assistance Techniques for Elicitation.- Part IV.c Negotiation.- 23 Fundamentals of Negotiation - 24 Conflict Management - 25 Negotiation Techniques.- Part V Validation.- 26 Fundamentals of Validation - 27 Validation Techniques - 28 Assistance Techniques for Validation.- Part VI Management.- 29 Three Management Activities - 30 Traceability of Requirements - 31 Prioritisation of Requirements - 32 Change Management for Requirements.- Part VII The Goal- and Scenario-based Requirements Engineering Method COSMOD-RE.- 33 The COSMOD-RE Method - 34 Application of the COSMOD-RE Method: A Driver Assistance System.- Part VIII Requirements Engineering for Software Product Lines.- 35 Fundamentals of Software Product Line Engineering - 36 Managing Product Line Variability - 37 Domain Requirements Engineering - 38 Application Requirements Engineering.- Part IX Relations to Design and Testing.- 39 Intertwining of Requirements Engineering and Architecture - 40 Requirements-based Testing.