3
Understanding Quality Attributes
Quality is never an accident; it is always the result of high intention, sincere effort, intelligent direction and skillful execution.
—William A. Foster
Many factors determine the qualities that must be provided for in a system’s architecture. These qualities go beyond functionality, which is the basic statement of the system’s capabilities, services, and behavior. Although functionality and other qualities are closely related, as you will see, functionality often takes the front seat in the development scheme. This preference is shortsighted, however. Systems are frequently redesigned not because they are functionally deficient—the replacements are often functionally identical—but because they are difficult ...
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