Extending the Book

Extending the Book

Although this book focuses more on the process of developing a design than the technology itself, a time will come when advances in technology make new design chapters appropriate. The following steps illustrate how an additional chapter dealing with a new technical infrastructure service may be developed.

Note that when documenting a design for a technical infrastructure service it is recommended that exactly the same approach is followed.


	1.	Review the technology. In particular, look for the characteristics that make it a technical infrastructure service. If its configuration is tied to the demands of a specific application then it is an application service and its configuration should be handled with the design of the particular application.


	2.	Decide which attributes apply and analyze the technology in general terms. Try applying the common attributes first. To discover any specific attributes consider the words you would use to compare one design with another for that infrastructure service.


	3.	Define the scope of the design. List all the items that must be specified for the design of this service to be complete.


	4.	Review the user requirements, application requirements, and business principles for anything they say that has a direct bearing on the design. This need not be exhaustive at this early stage of design but it sets out some basic parameters that allow the reader to follow early key decisions.


	5.	Develop the design creating design principles and taking guidance from the business principles.

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