Much has been written and said about existing software systems over the past few years. Tools and solutions have come and gone as organizations have taken on and discarded numerous “silver bullet” strategies for addressing major business and IT challenges. Yet massive, aging software systems remain at the core of most every industry. Increasingly complex, yet fragile, software systems play a critical role in insurance and healthcare, banking and finance, defense and government, manufacturing and telecommunications, energy and utilities, transportation, retail, and other industries.

Executives have come to the stark realization that these systems can no longer be ignored, are not going to fade away, and must be dealt with proactively ...

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