It might be tempting to treat the placement of infrastructure components as a precise science by assigning a points, or similar, system. However, as discussed in Chapter 1,"The Assessment Stage," existing SLAs might override any decisions made thus far. While all other requirements discussed thus far might dictate that a particular location should not receive any Active Directory infrastructure components, SLAs in place between the business and the IT department might dictate that logon times and access to resources should occur within a prescribed time. These SLAs can only be achieved if the necessary infrastructure components are located at the locations covered by the SLAs. It is imperative that all such agreements be carefully assessed and understood, their ramifications appreciated, and their requirements factored into any service placement designs.
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