| Wednesday, January 31 |
| 9:00 am - 10:30 am | |
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SOA: What Do Users Need to Know?
(90 mins)
John Salasin, NIST
View Participants
This workshop will evaluate and refine specifications for SOA “Predictive Metrics” -- measures (characteristics of the application and technology) that can be made early in the life cycle based on models of the system (technology and applications(s)) and will influence success in later stages. The models/metrics should suggest likely problems / opportunities at future stages of development / deployment to suggest corrective action.
The Predictive Metrics should provide a basis for continual system-level, Verification & Validation (V&V), in contrast to fixed milestone-based assessments of whether (paper) products have been delivered. The metrics should be useful in deciding if there is, at any point in its development/evolution, a high probability that the system will meet its requirements – and a minimal risk that it won’t.
Models are the “global invariants” of development. They must remain consistent, yet be adapted to express different levels of refinement and accuracy as design/implementation decisions are made and additional data collected. The session will address the relation between models and metrics.
Since an estimated 2/3 of a systems’ cost comes after its initial deployment, many of the models/metrics should represent factors that are likely to influence Total Cost of Ownership (TCO). A central principle of an SOA-based system is that the services and their orchestration map directly to business processes which may change frequently. The ease of synchronizing a business process change with the SOA is strongly related to the notation(s) used to express each, can have a major and continuing cost impact. If the translation has to be done manually, costs are likely to increase dramatically and translation errors to be introduced.
This 90 minute session s planned to consist of 3 talks of 15-20 minutes each. One on the current version of the metrics by John Salasin, NIST, one by a representative of IBM, and one by a representative of BEA. Talks will adress the uses of such metrics in an SOA life-cycle, their potential value, and required characteristics of the metrics if they are to provide the promised value. 30-45 minutes will be spent in a workshop reviewing and commenting on proposed metrics and suggesting other areas needing models/metrics. Do read a draft paper on potential metrics on this web site.
Agenda:
Overviw by John Salasin
Initial discussion by IBM and BEA reps -- (confirmed, but BEA TBD and I can't get at home files with info about IBM rep)
Group comment -- what's useful and not, what have we missed, what can be more explicit (vased on draft Taxonomy).
Location: Redbud
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| | Slides: Latest version of evolving brief -- SOA:What Users Need To Know |
| | Slides: Preliminary Draft Metrics - Background fo Discussiom |
| | Slides: SOA:What Users Need To Know |
| | Slides: Very early draft of top-level(s) metric taxonomy |