Enterprise Modelling Case Study

[object Object],Sean Luke Presented to The Open Group Conference in Budapest 2007

Outline ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

BTGS ,[object Object],[object Object],[object Object],[object Object]

Enterprise Architecture at BT ,[object Object],[object Object],[object Object],[object Object]

TOGAF ,[object Object],[object Object],[object Object],Case Study so far …

Impact Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],“ Without metrics, you’re just another guy with an opinion”, Michael Mah, Cutter

Business vs System metrics We already have many “system” metrics from Mgt Systems, CMDBs etc But these metrics will “influence” the business metrics (and visa-versa) … i.e. Performance/ Availability of the Services affects Service Penalties

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Architecture Metrics (a non-exhaustive list)

A fool with a tool is still a fool … ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],TOGAF® Certified www. avolution .eu

Case Study ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],All we’ve done so far

Case Study ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Technical Model 2 POP sites Single Voice Switch. Note: We can model as granularly as we like. Here just Call Agents are shown. Generic Customer Sites

In 3D Colour, shape and size can all be used to help understand complexity

Business Model Workflows – Imply that Signalling Messages are sent Actions performed during Call Flow Dataflows – Imply that media stream is sent/received Implemented By Devices in Physical Model

Completeness ,[object Object],[object Object],[object Object],Actions should be Implemented By a device and input/output Workflows Fibre Switches should be connected to Fibre Channels and CS-LANs Call Flow Steps have Actions, Decisions, …

As-Is Results: Performance Signalling messages are within their deadlines As are media stream packets

As-Is+ Results: Performance However, increasing users by 35% results in signalling messages missing deadlines and experiencing jitter Media flow packets come close to missing deadlines, and experience increased jitter

Evolution 1: Additional Voice Switch ,[object Object],[object Object],[object Object],Second Voice Switch

Evolution 2: Additional POP Sites ,[object Object],[object Object],New POP Sites

Evolution 2 Results: Performance Addition of POP Sites (including additional media proxies) allows media streams to meet deadlines Two Voice Switches allow signalling messages from 135% users to be handled within deadlines

Overall Results: The one ABACUS model contains all 4 architectures Allows unique comparative / trade-off analysis

Conclusions: Capability Space Diagram Response Time “blow-out” for As-Is+ and To-Be 1 To-Be 2 is significantly more Complex Is Cost within budget?

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]

Future Work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Enterprise Modelling Case Study

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Enterprise Modelling Case Study