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Tuesday, November 4 • 9:40am - 10:20am
Architectural Insights into Planning a Legacy System Modernization

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Many legacy systems were built decades ago using the technologies available at the time and have been operating successfully for many years. But they suffer from being built with components that are becoming obsolete, high licensing costs for COTS components, awkward user interfaces, and business processes that evolved based on expediency rather than optimality. In addition, new software engineers familiar with current technology are unfamiliar with the domain; documentation is scarce and outdated; the business rules are likely to be embedded in code that was written in an obsolete language using obsolete data structures; and the cadre of aging domain experts maintaining them is unfamiliar with newer technologies.

There are a number of optional large-grained approaches to modernization. We propose a rational way of using system architectural concepts to develop architectural options, create a scorecard, apply the scorecard, and present the results with recommendations to decision makers. The approach includes four steps:
  1. Determine and score the options and make decisions.
  2. Explore implementation alternatives.
  3. Build a target architecture.
  4. Build a roadmap to move over time to the target architecture.
The presentation will describe how this approach was applied to a large-scale IT modernization effort.

avatar for Phil Bianco

Phil Bianco

Carnegie Mellon Software Engineering Institute
Philip Bianco is a Senior Member of the Technical Staff at the Carnegie Mellon Software Engineering Institute (SEI). He holds an MS in software engineering from Carnegie Mellon University and a BS with Honors in computer science from the University of Pittsburgh. Currently, he provides direct support for DoD and DHS in the area of software architecture as part of the Software Solutions Division at the SEI. Research topics included tools to... Read More →
avatar for Michael Gagliardi

Michael Gagliardi

Carnegie Mellon Software Engineering Institute
avatar for William Wood

William Wood

Carnegie Mellon Software Engineering Institute
Mr. Wood has worked at the Carnegie Mellon Software Engineering Institute for the last 25 years and has performed a combination of research activities and customer-interactive activities. He currently works in the Software Solutions Division, focusing on developing and implementing methods that can be used to expose risks in a system or system-of-systems architecture. The evaluation methods are based on the Architecture Tradeoff Analysis... Read More →

Tuesday November 4, 2014 9:40am - 10:20am
Grand Station Ballroom 3

Attendees (2)