Chapter 8. Managing Business Rules and Models
8.1 Life-cycle costs
Like many other complex artifacts, an information system follows a life cycle. The system will be conceived, built, operated, and, eventually, pass into history. There“s always a strong temptation to focus on the early stages of the life cycle, when the system is being defined and created, because it“s here that the system takes on its fundamental characteristics. However, most of the cost of ownership of the system is incurred during its operational life.
Over this extended period, which can span decades, the system will be subject to various modifications—either to add new functionality or to fix problems—and go through technology updates to the underlying hardware, operating ...
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