Difference between revisions of "Viewpoint Advocacy Groups"

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(This is an early draft document, created for feedback purposes.  It does not reflect a consensus recommendation, or statement of policy at this time.)
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[[Image:slarch.jpg]]
(This is an early draft document, created for feedback purposes.  It does not yet reflect a consensus recommendation, or statement of policy at this time.  However, a number of VAGs have been [[Viewpoint Advocacy Groups#List of VA-Groups|defined]] and are in active use.)


Stakeholders in the Architecture have various agendas, goals, and viewpoints.  These views are critical to the design of the new grid.  This proposal is to create groups to focus on specific requirements.  The list of Viewpoint Advocacy Groups may grow and shrink during the course of this project.  The idea here is to provide a framework to address specific concerns in a systematic way.
The general approach is that recommended in [[IEEE_1471|IEEE-1471]].  Stakeholders in the Architecture have various agendas, goals, and viewpoints.  These views are critical to the design of the new grid.  This proposal is to create groups to focus on specific requirements.  The list of Viewpoint Advocacy Groups may grow and shrink during the course of this project.  The idea here is to provide a framework to address specific concerns in a systematic way.


"Membership" in a group is not exclusive.  Anyone can participate in as many or few groups as they deem appropriate.  Participation in a Advocacy Group does not imply lack of participation in the core AWG, which is merely an umbrella for all working subgroups.
"Membership" in a group is not exclusive.  Anyone can participate in as many or few groups as they deem appropriate.  Participation in a Advocacy Group does not imply lack of participation in the core AWG, which is merely an umbrella for all working subgroups.


Here are some diagrams explaining the concept:
==  Organizational structure for Viewpoint Advocacy Groups ==
 
Proposed organizational structure and definition of VAGs is under discussion on the [[Talk:Viewpoint_Advocacy_Groups|Talk page]].  All contributions welcome.
[[Image:vag-org.png | 400 px]]
 
Here is a conceptual layout of the VAGs:
 
[[Image:vag-concept.png | 400 px]]
 
Note these groups are just examples of what a group might be.  Notice that high level architectural issues are not VAGs, rather, all VAGs will consider high level architectural issues from their unique viewpoints.  For example, "Security" is not a viewpoint, so a "Security" VAG would make no sense.  All viewpoints will consider security in their own unique way, and provide input.
 
VAGs can be a way to bring less technical people into the fold and get their valuable input.  You do not need to understand the technical issues to provide input into a VAG.  The VAG delegates, however, should understand the technical issues involved in fulfilling the architectural requirements of a viewpoint, as this will be required in their participation in the core AWG.


== Purpose of Viewpoint Advocacy ==
== Purpose of Viewpoint Advocacy ==


The core goals of the AWG are as follows:
The purpose of Viewpoint Advocacy within the AWG includes the following:


:* Document rationale for architectural decisions.
:* To base architectural decisions on use cases via viewpoints.
:* Integrate the requirements of each viewpoint group.
:* To establish requirements from the concerns in each viewpoint.
:* Negotiate and document conflicts between each viewpoint.
:* To integrate the work of the separate viewpoint advocacy groups.
:* Integrate feedback from the various viewpoint advocacy groups.
:* To document, negotiate and resolve any conflicting concerns.
:* Produce a coherent architecture.
:* To produce a coherent architecture that conforms with the above.


A successful Viewpoint Advocacy Group requires:
A successful Viewpoint Advocacy Group requires:
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::* Name of the viewpoint
::* Name of the viewpoint
::* List of stakeholders holding this viewpoint
::* List of stakeholders holding this viewpoint
::* A statement of areas included and excluded from the viewpoint
::* List of concerns addressed by this viewpoint
::* List of concerns addressed by this viewpoint
::* Language, modeling techniques, representation method or tools used within this viewpoint
::* Language, modeling techniques, representation method or tools used within this viewpoint
Line 54: Line 48:


== List of VA-Groups ==
== List of VA-Groups ==
<!-- Put these in alphabetial order -->
In alphabetical order:
* [[Accessibility VAG]] (ensuring Second life is accessible to users with disabilities)
* [[Core Grid Services, Protocols, and Structures VAG]] (REST, c-http, escrow, capabilties, and core protocols)
* [[Event Scalability VAG]]
* [[Geometry and Physics VAG]]
* [[Geometry and Physics VAG]]
* [[Grid Interoperability VAG]]
* [[Live Performances VAG]]
* [[Quality Assurance VAG]]
* [[Quality Assurance VAG]]
* [[REST Services VAG]]
* [[Scalability VAG]]
* [[Scalability VAG]]
* [[Communications VAG]] (XML-RPC, email, HTTP requests, bots, etc.)
[[Category: AW Groupies]]

Latest revision as of 12:15, 2 October 2008

Open Source Portal

Slarch.jpg (This is an early draft document, created for feedback purposes. It does not yet reflect a consensus recommendation, or statement of policy at this time. However, a number of VAGs have been defined and are in active use.)

The general approach is that recommended in IEEE-1471. Stakeholders in the Architecture have various agendas, goals, and viewpoints. These views are critical to the design of the new grid. This proposal is to create groups to focus on specific requirements. The list of Viewpoint Advocacy Groups may grow and shrink during the course of this project. The idea here is to provide a framework to address specific concerns in a systematic way.

"Membership" in a group is not exclusive. Anyone can participate in as many or few groups as they deem appropriate. Participation in a Advocacy Group does not imply lack of participation in the core AWG, which is merely an umbrella for all working subgroups.

Organizational structure for Viewpoint Advocacy Groups

Proposed organizational structure and definition of VAGs is under discussion on the Talk page. All contributions welcome.

Purpose of Viewpoint Advocacy

The purpose of Viewpoint Advocacy within the AWG includes the following:

  • To base architectural decisions on use cases via viewpoints.
  • To establish requirements from the concerns in each viewpoint.
  • To integrate the work of the separate viewpoint advocacy groups.
  • To document, negotiate and resolve any conflicting concerns.
  • To produce a coherent architecture that conforms with the above.

A successful Viewpoint Advocacy Group requires:

  • To present a set of related concerns about the system in the form of a clear viewpoint.
  • To document architectural specifications that stem from this viewpoint.
  • To consider the architectural needs of likely implementations that fulfill the specifications.
  • To operate in a way that allows for alternate implementations that satisfy the viewpoint.
  • To work with the core goals to document views and requirements that conflict or are inconsistent.
  • To review the core goals against the work output to ensure that the view's requirements are met.
  • The end result of the above is an architectural description which reveals the architecture from this viewpoint.

Defining a Viewpoint

A good viewpoint might include the following elements: (borrowing freely from Emery):

Required:
  • Name of the viewpoint
  • List of stakeholders holding this viewpoint
  • A statement of areas included and excluded from the viewpoint
  • List of concerns addressed by this viewpoint
  • Language, modeling techniques, representation method or tools used within this viewpoint
  • Source for the viewpoint
  • Use Cases
Optional:
  • Consistency/completeness tests for the viewpoint
  • Evaluation/analysis techniques
  • Heuristics, patterns, other guidelines
  • Estimation of associated cost in resources

List of VA-Groups

In alphabetical order:

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