1. NIST Cyber-Physical Systems Public Working Group: Draft CPS Framework
Dr. David Wollman Deputy Director, Smart Grid and Cyber-Physical Systems Program Office Engineering Laboratory, NIST

2. Cyber-Physical Systems
Cyber-physical systems (CPS) are smart systems that include engineered interacting networks of physical and computational components (and human users).
Cyber-Physical Systems
system-of-systems
cyber-physical system
Info
Decision
Energy/Material
Action
cyber
physical
cyber-physical device

3. NIST CPS Program Overview
Global Cities Team Challenge
Smart Cities are key platforms for demonstrating replicable, scalable and reproducible deployments of CPS/Internet of Things solutions
June “Expo” featured 63+ teams and 200+ participating companies, cities and universities
GCTC 2016 announced, kickoff in Nov2015
CPS Public Working Group
NIST leadership w/industry, academia, government; CPS experts in 5 working groups have contributed to creation of draft CPS Framework (public review) –
CPS Test Bed
Conceptual design in progress; CPS Testbed workshop Feb2015.
CPS Standards and Research
Cybersecurity, industrial control systems, manufacturing, healthcare, smart grid, …
CPS PWG
CPS Testbed

4. CPS PWG Goal: Create CPS Framework to support CPS research, development and deployment
Need multi-domain perspective baked in
Applicable within all CPS domains
Supports cross-CPS domain applications
CPS Framework
CPS
Actors
Goals
use
achieve
Smart infrastructure (grid, water, gas, …)
Smart emergency response
Many more!!
Smart transportation
Smart buildings
Smart healthcare
Smart manufacturing

5. What are Frameworks?
Frameworks are conceptual structures that organize and make clear collective wisdom (vision, principles, underlying structure, functions, requirements, practices, …)
Frameworks are created with technical expertise and process
Expertise: collective knowledge, experience infused with creativity
Process: organized methodology within active stakeholder community
Communities of practice, processes, organizations, standards …
Roadmaps: Action plans and time schedules for getting from here to there
Perspectives, Viewpoints, Views, …

6. NIST CPS Public Working Group (CPS PWG)
Draft Framework for Cyber-Physical Systems, Release 0.8
NIST CPS PWG leadership: David Wollman and Chris Greer
Co-Chairs
Reference
Arch
Use
Cases
Security
Timing
Data Interop
NIST
Abdella
Battou
Eric Simmon
Vicky
Pillitteri, Steve Quinn
Marc Weiss
Marty Burns
Academia
Janos
Sztipanovits
John Baras
Bill Sanders
Hugh Melvin
Larry Lannom
Industry
Stephen Mellor, Shi-Wan Lin, Ed Griffor (now at NIST)
Stephen Mellor
Claire Vishik
Sundeep Chandhoke
Peggy Irelan, Eve Schooler
F2F Workshops: August 2014 and April 2015
December 2014: “Framework Element” documents from each of 5 subgroup
March 2015: Preliminary Discussion Draft CPS Framework, Release 0.7
September 2015: Draft CPS Framework, Release 0.8 for public review and comments

7. CPS Framework Analysis Methodology

8. CPS Framework Structure
Facets
Aspects
Conceptualization
Realization
Assurance
Functional
Business
Human
Trustworthiness
Timing
Data
Boundaries
Composition
Lifecycle
Use Case, Requirements, …
Model of a CPS
Design / Produce / Test / Operate
CPS
Argumentation, Claims, Evidence
CPS Assurance
Activities and their Artifacts
Manufacturing
Transportation
Energy
Healthcare
others …
Domains

9. Trustworthiness “Aspect” (grouping of concerns)
Security
Privacy
Safety
Reliability
Resilience
Safety
Reliability
Resilience
Cybersecurity
Privacy
Physical
Analog
Cyber

10. Activities and Artifacts
CPS
CPS Assurance
Model of CPS
Conceptualization Activities
Realization Activities
Conceptualization Facet
Assurance Facet
Realization Facet
Assurance Activities
In using the framework to analyze and document CPS, a series of activities is performed. For example, a typical waterfall-like process will include:
use case development
functional decomposition
requirements analysis
design, etc.
An activity produces one or more artifacts.
For example, the activities and associated artifacts of the conceptualization facet commonly include:
Mission and Business Case Development
Artifact: Business use cases
Functional Decomposition
Artifact: Detailed use cases, actors, information exchanges
Requirements Analysis
Artifact: Functional and non-functional requirements
Requirements Allocation
Artifact: HW/SW configuration Items
Interface Requirements Analysis
Artifact: Interface requirements

11. Draft CPS Framework: Public Review and Comments
Draft CPS Framework, Timing Technical Annex, and spreadsheet for comments are available on
Comments due November 2, 2015 – please comment spreadsheet to