Enterprise Architecture Methodology at KPMG David vun Kannon

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Enterprise Architecture Methodology at KPMG David vun Kannon Manager, Financial Services Consulting KPMG LLP

Enterprise Architecture Methodology at KPMG David vun Kannon Manager, Financial Services Consulting KPMG LLP 6/4/2021 1

Introduction The Problem: “I spent $500 million on IT, and all I got was

Introduction The Problem: “I spent $500 million on IT, and all I got was this lousy source code (ERP system, etc. )!” 6/4/2021 2

Topics of Discussion Overview of enterprise architecture Our model-driven approach The relevance of XML

Topics of Discussion Overview of enterprise architecture Our model-driven approach The relevance of XML 6/4/2021 3

Overview of Enterprise Architecture Skyscrapers are not 10, 000 doghouses stacked on top of

Overview of Enterprise Architecture Skyscrapers are not 10, 000 doghouses stacked on top of each other. 10 K doghouses=10 K siloed apps No global planning or direction a function of the disconnect between IT and the business it supports. 6/4/2021 4

Enterprise Requirements “You start coding, I’ll get the requirements. ” NOT! Cannot overemphasize the

Enterprise Requirements “You start coding, I’ll get the requirements. ” NOT! Cannot overemphasize the importance of design and requirements gathering Exponentially less costly to fix mistakes at this stage. 6/4/2021 5

KPMG’s Model-Driven Approach Capture requirements Organise requirements Operationalise requirements Shadow Implementation to maintain relevance

KPMG’s Model-Driven Approach Capture requirements Organise requirements Operationalise requirements Shadow Implementation to maintain relevance 6/4/2021 6

Leveraging the Requirements Documentation Code generation Administrivia 6/4/2021 7

Leveraging the Requirements Documentation Code generation Administrivia 6/4/2021 7

The Relevance of XML UML is a visual language No consistent API Models are

The Relevance of XML UML is a visual language No consistent API Models are documents, not programs 6/4/2021 8

XMI – UML in XML Part of OMG MOF initiative A mechanically derived DTD

XMI – UML in XML Part of OMG MOF initiative A mechanically derived DTD Goal is supporting interchange 6/4/2021 9

Simple. Bank A trivial model A non-trivial script Legacy up-translation 6/4/2021 10

Simple. Bank A trivial model A non-trivial script Legacy up-translation 6/4/2021 10

What This Means Separation of modeling and code generation Choose the right tool for

What This Means Separation of modeling and code generation Choose the right tool for the job Legacy support via up-translation to XMI 6/4/2021 11

XMI – Not Just For Interchange Code Generation Separating Modeling and CG The relevance

XMI – Not Just For Interchange Code Generation Separating Modeling and CG The relevance of XSL 6/4/2021 12

Code Generation Traditional target of the object model’s class diagram UI - HTML Business

Code Generation Traditional target of the object model’s class diagram UI - HTML Business Logic - Data structures, function stubs, directory and file structure in C++, Java, VB, etc. Persistent Storage – SQL DDL Targeted in isolation 6/4/2021 13

Separating Modeling from CG Tools do one thing well Don’t expect good code generation

Separating Modeling from CG Tools do one thing well Don’t expect good code generation from a great modeler More choices from unbundled tools 6/4/2021 14

The Relevance of XSLT Tool appropriate to the task Can quickly add new targets

The Relevance of XSLT Tool appropriate to the task Can quickly add new targets Can tune the O-R mapping 6/4/2021 15

UML 2 SQL. XSL Generates DDL for MS SQL Server March draft XSLT and

UML 2 SQL. XSL Generates DDL for MS SQL Server March draft XSLT and XT 6/4/2021 16

Next Steps Tremendous opportunities in code generation New targets – LDAP, DSML, UIML New

Next Steps Tremendous opportunities in code generation New targets – LDAP, DSML, UIML New Sources – sequence diagrams, statecharts, Cross tier coordination The XML messaging vocabulary Round trip engineering 6/4/2021 17

Next Steps From static to dynamic system descriptions Decorating the model with active metadata

Next Steps From static to dynamic system descriptions Decorating the model with active metadata Application instrumentation Design For Change and the invalidated assumption 6/4/2021 18

HL 7 XBRL etc David vun Kannon RationalHL 7 XBRL etc David vun Kannon Rational
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