Module 5: Enterprise Architecture Methods

Edgar Codd, a research fellow at IBM San Jose Labs, developed the relational model from mathematical set theory which became the foundation of the relational database technology.

Late 1960s - early 1970s

The first relational database management systems (RDBMSs) were released by IBM Corporation (IBM DB2 RDBMS) and by Oracle Corporation (Oracle RDBMS.

Late 1970s - early 1980s

The business-driven approach evolved into integrated methods for information, using a rigorous engineering discipline, called information engineering (IE).

Mid-1970s

IE, originally developed by Clive Finkelstein but was popularized worldwide by James Martin

1980s

The concepts of object-oriented (O-O) development and the unified modeling language (UML) were developed by Grady Booch, James Rumbaugh, and Ivar Jacobson.

Late 1980s

UML and Rational software tools were popular and widely used.

Late 1990s

IBM purchased Rational Corporation and Rational became a subsidiary of IBM.

2003

This strategy achieves enterprise-wide data integration with a fully attributed, fully normalized logical data model.

Strategy A: Implementation in top-down, rigorous detail

Appropriate if an ROI business case must first be established before a decision is made to introduce an enterprise architecture approach.

Strategy B: Selective EA, based on ROI business case

This leads to incremental implementation of priority areas that are needed first, before other areas that can wait until later.

Strategy C: Deliver progressively in 3-month incremental builds.