Chapter 10. Maintaining Transactional Context


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with Santiago Comella-Dorda

Santiago Comella-Dorda is a business analyst with McKinsey & Company.

It is commonplace that a problem stated is well on its way to solution, for statement of the nature of a problem signifies that the underlying quality is being transformed into determinate distinctions of terms and relations or has become an object of articulate thought.

”John Dewey, (1859 “1952)
The Symposium (1930)

Any solution to a problem changes the problem.

”R. W. Johnson (b. 1916)
Washingtonian (November 1979)

In an incremental modernization effort, transactions processed entirely in the legacy system may at some point be distributed across both legacy and modernized components . Identifying and validating a design solution to this problem is a prerequisite to the overall modernization effort.

Our approach to identifying and validating design solutions uses model problems ”focused experimental prototypes that reveal technology/product capabilities, benefits, and limitations in well-bounded ways. Model problems reduce design risks. However, no amount of modeling can completely eliminate design risks. Therefore, the designer must be satisfied with reducing risk as much as possible. The use of model problems is a component-based software engineering technique described by Wallnau et al. [Wallnau 01].



Modernizing Legacy Systems
Modernizing Legacy Systems: Software Technologies, Engineering Processes, and Business Practices
ISBN: 0321118847
EAN: 2147483647
Year: 2003
Pages: 142

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