Migrating to the Solaris™ Operating System: The Discipline of UNIX-to-UNIX® Migrations

Moving Between Phases

Sun's AIM life-cycle view implies that there is a stately progression from architecture, through implementation, to management, but this is not the case. In practice, migration projects will iterate within phases and reenter preceding phases to improve the deliverables of those preceding phases. Sun considers assessment and technology planning work to be part of the architect phase, and the application of the AIM methodology assumes that a justification activity has already taken place.

For example, during the justification process, a business case will be delivered. Fact finding that occurs during the architect phase might require you to reevaluate the business case. In this case, the methodology requires that the justification ...