Model archiving and sustainment for aerospace design / Sean Barker.

Model Archiving and Sustainment for Aerospace Design, written by Sean Barker, an industry veteran from the UK, focuses on the techniques developed by the LOTAR (Long Term Archiving and Retrieval) project, a collaboration among the major US and European aerospace companies. Long-term archiving models follows LOTAR by taking the exchange of mechanical CAD file as the paradigm for long-term retention and developing general principles for model archiving. These include electrical systems, composite parts, systems engineering and requirements engineering. The increasing availability of model-based software has made the problems of long-term model sustainment more visible and pressing for a solution. Industries following LOTAR today include aerospace, automotive, nuclear and ship building. In the aerospace sector, the challenges are even bigger. Model Archiving and Sustainment for Aerospace Design makes sense of the immense challenges of rapid software change to ensure that the aircraft can be profitably sustained for the next seventy years.

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Cover -- Table of Contents -- acknowledgments -- biography -- CHAPTER 1 Introducing Data Retention: Why? What? and How? -- 1.1 Why?: Data Sustainment and Business Risk -- 1.2 The Sustainment Problem and Why It Is Coming to the Forefront Now -- 1.3 Retain What? Knowledge, Information, or Data? -- 1.4 Is It Long-Term Sustainment -- or Retention or Archiving? -- 1.5 Sources for How: OAIS, LOTAR, RASSC -- 1.6 Summary -- References -- CHAPTER 2 Why Retain Information? -- 2.1 Aerospace Business Drivers -- 2.1.1 Driver 1: Airworthiness -- 2.1.2 Driver 2: Product Liability -- 2.1.3 Driver 3: Reuse

2.2 Retaining Data across the SupplyChain -- 2.3 Retaining Data through the In-Service Phase -- 2.4 Retention and Business Restructuring -- 2.5 Quality Requirement: Key Characteristics -- 2.6 LOTAR Requirements -- 2.7 Summary -- References -- CHAPTER 3 OAIS: The Model for an Archive -- 3.1 What Is OAIS? A User Perspective -- 3.2 Key Processes in OAIS -- 3.2.1 Ingest-How Information Gets into the Archive -- 3.2.2 Access-Getting It Out Again -- 3.2.3 Preservation Planning-Keeping It Live Inside the Archive -- 3.3 Metadata-Remembering What the Archive Contains

3.4 Metadata-Remembering What the Data Means -- 3.5 One Archive or Many? -- 3.6 Summary -- References -- CHAPTER 4 Archiving as a Service -- 4.1 What Is Archiving-as-a-Service ? -- 4.2 The Architectural Context -- 4.3 Building Service Stacks -- 4.4 Archival Service Stack -- 4.5 Access and Aircraft Configuration -- 4.6 Sustaining Archival Services -- 4.7 Summary -- References -- CHAPTER 5 LOTAR: The Basics -- 5.1 What Does LOTAR Do? -- 5.2 What Information Do Designers Create? -- 5.3 LOTAR: The Project and the Standard -- 5.4 What Exactly Is a Standard? -- 5.5 LOTAR: Fundamental Concepts

5.5.1 Core Model, Key Characteristics, and Validation Properties -- 5.5.2 Model Representation -- 5.5.3 Quality, Validation, and Verification -- 5.5.4 Digital Signatures -- 5.6 LOTAR: Parts of the Standard -- 5.7 LOTAR: Processes and Extending OAIS -- 5.8 Summary -- References -- CHAPTER 6 Governance, Planning, and Preservation Planning -- 6.1 Governance: Getting the Archive You Want -- 6.2 Layers of Governance -- 6.2.1 Business Level -- 6.2.2 Engineering Level -- 6.2.3 Technical Level -- 6.3 How Much Will It Cost? -- 6.4 Provenance: Trusting the Data -- 6.5 Audit: Checking the Archive Works

6.6 Summary -- References -- CHAPTER 7 Basics of CAD -- 7.1 What Is CAD? -- 7.2 Curves: From Data to Equations -- 7.3 Geometry, Topology, and Errors in the Model -- 7.4 Assemblies: More Than Just Parts -- 7.5 Types of CAD System and Their Incompatibilities -- 7.6 Manufacturing and the Information It Needs -- 7.7 Visualization: CAD Lite -- 7.8 Defining CAD Data: Exchange Standardization -- 7.9 Standardizing CAD Data: STEP AP 242 -- 7.10 Summary -- References -- CHAPTER 8 Preserving CAD -- 8.1 What Is Your Goal? -- 8.2 Preserving Basic 3D Geometry -- 8.2.1 The Core Geometry

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