INCOSE Needs and Requirements Manual

Louis S. Wheatcraft is a Senior Consultant and Managing Member of Wheatland Consulting, LLC and is a long time member of INCOSE and is the current Chair of the INCOSE Requirements Working Group. Michael J. Ryan is the Director of Capability Associates Pty Ltd. Dr. Ryan recently retired as a Professor at the University of New South Wales and is an INCOSE Fellow. Tami Edner Katz is a Staff Consultant at BAE Systems, Inc. working as a chief engineer on various space mission projects. Dr. Katz also teaches courses on MBSE and Requirements at the University of Colorado at Boulder.

• INCOSE Notices xvPreface xviAuthors xviiMajor Contributors xviiiReviewers xixRevision History xxList of Figures xxiList of Tables xxiv1 Introduction 11.1 Purpose 11.2 Scope 21.3 Audience 31.4 Approach 31.5 Mapping of NRVV Across Standards 51.6 The Five NRVV Activity Areas Discussed in this Manual 71.7 Needs and Requirements Manual Organization 82 Definitions and Concepts 112.1 Ontology used in this Manual 112.2 Definitions 162.3 Basic Concepts 203 Information-Based Needs and Requirement Development and Management 633.1 Information-Based Needs and Requirements Definition and Management 643.2 Expression of Text-Based Needs and Requirements within RMTS Versus Models and Diagrams 704 Lifecycle Concepts and Needs Definition 774.1 Introduction 774.2 Prepare for Lifecycle Concepts and Needs Definition 814.3 Define Inputs to Lifecycle Concepts Analysis and Maturation 824.4 Capture Preliminary Integrated Set of Lifecycle Concepts 1304.5 Lifecycle Concepts Analysis and Maturation 1354.6 Define and Record the Integrated Set of Needs 1624.7 Plan for System Validation 1764.8 Baseline and Manage Lifecycle Concepts and Needs Definition Outputs 1775 Needs Verification and Validation 1795.1 Needs Verification 1805.2 Needs Validation 1845.3 Manage Needs Verification and Validation Results 1865.4 Use of Attributes to Manage Needs Verification and Validation 1876 Design Input Requirements Definition 1896.1 Prepare for Design Input Requirements Definition 1906.2 Perform Design Input Requirements Definition 1916.3 Baseline and Manage Design Input Requirements 2526.4 Architectural Levels, Flow Down, Allocation, and Budgeting 2576.5 Summary of Design Input Requirements Definition 2757 Requirements Verification and Validation 2777.1 Requirements Verification 2787.2 Requirements Validation 2837.3 Manage Requirements Verification and Validation Results 2867.4 Use of Attributes to Manage Requirements Verification and Validation 2868 Design Verification and Design Validation 2898.1 Design Definition Process Overview 2908.2 Early System Verification and Validation 2938.3 Updating System Verification and Validation Artifacts 2958.4 Design Verification 2968.5 Design Validation 2998.6 Manage Design Verification and Validation Results 3028.7 Use of Attributes to Manage Design Verification and Design Validation 3039 Production Verification 3059.1 Production Verification Defined 3059.2 Scalability, Repeatability, and Yield 3069.3 Production Verification Versus System Verification 3079.4 Verification and Validation of the Manufacturing System 3089.5 Special Considerations 3089.6 Production Verification 31010 System Verification and Validation Common Principles 31110.1 Planning Stage 31510.2 Defining Stage 34510.3 Execution Stage: Performing the Procedures 35210.4 Reporting Stage: Documenting the Results 35810.5 Approval Stage 36210.6 Use of Attributes to Manage System Verification and Validation Activities 36310.7 Maintaining the System Verification and Validation Artifacts 36411 System Verification and System Validation Processes 36711.1 System Verification and Validation per Level 36811.2 Managing the Project’s System Verification and Validation Programs 37011.3 System Verification Activities 37111.4 System Validation Process 37412 The Use of OTS System Elements 37913 Supplier-Developed SOI 38513.1 Customer/Supplier Relationships 38513.2 Customer/Supplier Verification Versus Validation Considerations 39213.3 Addressing the Evolutionary Nature of Interface Definitions 39514 Needs, Requirements, Verification, and Validation Management 39714.1 Prepare for Needs, Requirements, Verification, and Validation Management 39914.2 Perform Needs, Requirements, Verification, and Validation Management 40215 Attributes for Needs and Requirements 42715.1 Attributes to Help Define Needs and Requirements and Their Intent 42815.2 Attributes Associated with System Verification and System Validation 43015.3 Attributes to Help Manage the Needs and Requirements 43215.4 Attributes to Show Applicability and Enable Reuse 44015.5 Attributes to Aid in Product Line Management 44115.6 Guidance for Using Attributes 44216 Desirable Features of an SE Toolset 44516.1 Choosing an Appropriate Toolset 44516.2 Desirable Features of an SE Toolset 447Appendix A: References 455Appendix B: Acronyms and Abbreviations 459Appendix C: Glossary 465Appendix D: Comment Form 487Index 489