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It covers WBS purpose and applicability, foundational concepts and hierarchy, and relationships between the WBS and contract WBS (CWBS) and dictionaries. 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Administration  \nNovember, 2021  \nElectronic copies are available from:  \nNASA STI Program: [http://www.sti.nasa.gov](http://www.sti.nasa.gov)  \nNASA STI Information Desk Email to: [help@sti.nasa.gov/](help@sti.nasa.gov/)  \n(757) 864-9658  \nWrite to:  \nNASA STI Information Desk Mail Stop 148  \nNASA LaRC  \nHampton, VA 23681-2199  \nOCFO-SID EVM Homepage  \n[https://community.max.gov/display/NASA/](https://community.max.gov/display/NASA/)[ ](https://community.max.gov/display/NASA/)Earned+Value+Management+HOMEPAGE  \n(inside the NASA firewall only)  \nNASA Engineering Network (NEN) Community Home Program/Project Management  \n[https://nen.nasa.gov/web/pm](https://nen.nasa.gov/web/pm) (inside the NASA firewall only)  \nTABLE OF CONTENTS  \nList of Figures and Illustrations.......................................................................................................v  \nRecord of Revisions........................................................................................................................vi  \nPreface...........................................................................................................................................vii  \nP.1 Purpose...................................................................................................................................................................vii  \nP.2 Applicability...........................................................................................................................................................vii  \nP.3 References..............................................................................................................................................................vii  \nChapter 1: Introduction.................................................................................................................viii  \n1.1 Background Information........................................................................................................................................viii  \n1.2 Policy.....................................................................................................................................................................viii  \nChapter 2: WBS Overview..............................................................................................................9  \n2.1 Definition..................................................................................................................................................................9  \n2.2 WBS Hierarchy....................................................................................................................................................... 10  \n2.2.1 Establishing and Maintaining WBS Codes in NASA’s Management Systems................................................... 12  \n2.2.2 Contract Work Breakdown Structure (CWBS) and CWBS Dictionary............................................................... 14  \n2.2.3 Work Breakdown Structure Elements by Other Performing Entities.................................................................. 16  \n2.3 Development Guidelines......................................................................................................................................... 17  \n2.4 Summary................................................................................................................................................................. 17  \nChapter 3: WBS Development and Control...................................................................................19  \n3.1 WBS and the Project Life Cycle............................................................................................................................. 19  \n3.2 WBS Activities and Responsibilities.................................................................................................................","cbCaiaEOHvBhgPK7","https://ap.wps.com/l/cbCaiaEOHvBhgPK7","pdf",4145643,67,"English","# TABLE OF CONTENTS\n## Preface\n### P.1 Purpose\n### P.2 Applicability\n### P.3 References\n## Chapter 1: Introduction\n## Chapter 2: WBS Overview\n### 2.1 Definition\n### 2.2 WBS Hierarchy\n### 2.3 Development Guidelines\n### 2.4 Summary\n## Chapter 3: WBS Development and Control\n### 3.1 WBS and the Project Life Cycle\n### 3.2 WBS Activities and Responsibilities\n### 3.3 Development Considerations\n### 3.4 WBS Development Techniques","[{\"question\":\"What is the purpose and applicability of the NASA WBS handbook?\",\"answer\":\"The handbook states its purpose and defines where the guidance applies within NASA programs and projects, including the references that support its use.\"},{\"question\":\"How does the handbook define the WBS and its hierarchy?\",\"answer\":\"It explains WBS definition and describes how to structure a WBS hierarchy, including how to establish and maintain WBS codes in NASA’s management systems.\"},{\"question\":\"What techniques does the handbook recommend for developing and controlling WBS?\",\"answer\":\"It outlines development techniques such as using consistent coding for WBS elements, preparing element tree diagrams and functional requirement block diagrams, building a WBS dictionary, and applying change control with defined responsibilities.\"}]","NASA Work Breakdown Structure (WBS) Handbook - read online | PDF",1789148918,23]