NATO Architecture Framework
NATO Architecture Framework
The aim of the NATO Architecture Framework Version 4 (NAFv4) is to provide a standard for developing and describing architectures for both military and business use. It provides a standardized way to develop architecture artefacts, by defining the following:
- Introduction – an overview of NAF, what it is and who uses it (Chapter 1)
- Methodology – how to develop architectures and run an architecture project (Chapter 2)
- Viewpoints – conventions for the construction, interpretation and use of architecture views for communicating the enterprise architecture to different stakeholders (Chapter 3)
- Meta-Models – the application of commercial meta-models identified as compliant with NATO policy (Chapter 4)
- Glossary, References and Bibliography (Chapter 5)
The NATO Architecture Framework v4 (NAFv4), issued by the Architecture Capability Team (ACaT) of the NATO Consultation, Command and Control Agency (C3B) in January 2018, provides guidance on describing both enterprise architectures and systems architectures.
The objectives of the framework are to:
- Provide a way to organize and present architectures to stakeholders
- Specify the guidance, rules, and product descriptions for developing and presenting architecture information
- Ensure a common approach for understanding, comparing, and integrating architectures,
- Act as a key enabler for acquiring and fielding cost-effective and interoperable capabilities
- Align with architecture references produced by international standard bodies (International Organization for Standardization, Institute of Electrical and Electronics Engineers, The Open Group, Object Management Group etc.)
Methodology
NAFv4 Chapter 2 provides a methodology which includes how to set up an architecting environment, govern, manage, define and evaluate architectures. The methodology has been developed from accepted best practice and standards, detailing the following:
- Terms and concept for architecting.[1]
- A foundation for architecture activities[2]
- Architecture principles[3]
- Architecture activities at enterprise and project levels [4]
- Architecture repositories and libraries enabling reuse and improved interoperability between communities, and to formalize architecture-based references.[4]
Viewpoints (Grid representation)
NAFv4 Chapter 3 defines Viewpoints, Views and Architecture Descriptions. It details a two-dimensional classification scheme for the standardized architecture viewpoints, this serves as the baseline for any NAF-Compliant architecture effort. To aid architects, these viewpoints are organized into a logical and consistent manner and presented as a “grid”. This ‘grid’ structure, represents the various ‘subjects of concern’ (rows) and ‘aspects of concern’ (columns), as shown below:
| Behaviour | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Taxonomy | Structure | Connectivity | Processes | States | Sequences | Information | Constraints | Roadmap | ||
| Concepts | C1
Capability Taxonomy NAV-2, NCV-2 |
C2
Enterprise Vision NCV-1 |
C3
Capability Dependencies NCV-4 |
C4
Standard Processes NCV-6 |
C5
Effects NOV-6b |
C7
Performance Parameters NCV-1 |
C8
Planning Assumptions |
Cr
Capability Roadmap NCV-3 | ||
| C1-S1 (NSOV-3) | ||||||||||
| ServiceSpecifications | S1
Service Taxonomy NAV-2, NSOV-1 |
S3
Service Interfaces NSOV-2 |
S4
Service Functions NSOV-3 |
S5
Service States NSOV-4b |
S6
Service Interactions NSOV-4c |
S7
Service I/F Parameters NSOV-2 |
S8
Service Policy NSOV-4a |
Sr
Service Roadmap | ||
| LogicalSpecifications | L1
NAV-2 |
L2
Logical Scenario NOV-2 |
L2-L3 (NOV-1) |
L3
Node Interactions NOV-2, NOV-3 |
L4
Logical Activities NOV-5 |
L5
Logical States NOV-6b |
L6
Logical Sequence NOV-6c |
L7
Logical Data Model NSV-11a |
L8
Logical Constraints NOV-6a |
Lr
Lines of Development NPV-2 |
| L4-P4 (NSV-5) | ||||||||||
| PhysicalResourceSpecifications | P1
Resource Types NAV-2, NSV-2a,7,9,12 |
P2
Resource Structure NOV-4,NSV-1 |
P3
Resource Connectivity NSV-2, NSV-6 |
P4
Resource Functions NSV-4 |
P5
Resource States NSV-10b |
P6
Resource Sequence NSV-10c |
P7
Physical Data Model NSV-11b |
P8
Resource Constraints NSV-10a |
Pr
Configuration Management NSV-8 | |
| ArchitectureManagement | A1
Meta-Data Definitions NAV-3 |
A2
Architecture Products |
A3
Architecture Correspondence ISO42010 |
A4
Methodology Used NAF Ch2 |
A5
Architecture Status NAV-1 |
A6
Architecture Versions NAV-1 |
A7
Architecture Meta-Data NAV-1/3 |
A8
Standards NTV-1/2 |
Ar
Architecture Roadmap | |
The selection of Viewpoints must be tailored to the specific architecture effort; i.e. suitable Viewpoints need to be identified in the grid, should additional Viewpoints be required they must defined.
A View is specified by a Viewpoint, this prescribes the concepts, models, analysis techniques and visualizations that are provided by the View.
The Architecture Description typically addresses a set of related concerns and is tailored for specific stakeholders.
- A View specifies what you see
- A Viewpoint is where you are looking from, focusing on particular subjects or stakeholder concerns
Note: the NAFv4 specifies how views of NAF version 3 (NAFv3) can be reused, i.e. each cell of the “grid” refers to the NAFv3 views and the NAFv4 methodology explains how forward and backward compatibility can be ensured.
Adoption of Industry Meta-Models
Chapter 4 of the NATO Architecture Framework identifies the commercial meta-models which can be used to creation viewpoints described in chapter 3:
- The Open Group's ArchiMate, as specified in Version 3.1,[5] and supported by the Archi® free open source tool.
- The Object Management Group's Unified Architecture Framework (UAF)® Domain Meta-model (DMM)®, as specified in Version 1.[6]
Glossary, References and Bibliography
Chapter 5 of the NATO Architecture Framework define major definitions and references in line with the major standards and reference documents used in Architecture activities.
Web access to download NAFv4
Official site to download the latest version of NAF is available (here) or on the (NATO Portal).
Search for “Architecture” and select the “NATO Architecture Framework, Version 4” entry.