Business Analysis(a) is to be done with a view to build a system with Flexible and expandable architecture, such as PEXA® Conceptual Pattern Framework*, as:

• The user organization seldom knows exactly what they want and cannot articulate all the requirements at the beginning.
• Even if they could state all the requirements, there usually are many details that can be found only when the implementation phase progresses.
• After the implementation, various external factors may require the modification of the specification.
• The users will not completely satisfied with the new system, and requirements may be altered, expanded and removed frequently, during the course of development and after the implementation.

*PEXA is a registered trademark of Atrris Corporation in Japan and/or other countries.