Designing ISP Architectures

Formulating Requirements for a Design

Ideally, every design should be predicated on detailed requirements. Formulating requirements is a process that can vary greatly depending upon how well your ISP customers know their business challenges (present and future) and on how readily available their requirements are.

We recommend the following process when you are formulating requirements for designing an ISP architecture:

1. “Obtain Requirements”

2. “Evaluate Requirements”

3. “Establish Assumptions”

4. “Determine Design Trade-Offs”

5. “Address Architectural Limitations” on page 25

The following topics address each of these tasks within the process of formulating and evaluating design requirements.

Obtain Requirements

Obtaining requirements is the first and foremost ...