In order to begin either an upgrade project or a new implementation of SAP BW, there are several things to understand about its implementation cycle. In many cases, the lifecycle of BW is similar to implementation of a transactional system. However, because projects in BW typically bring data from many different source systems and subject areas, rather than one source as with transactional systems, BW requires additional design iterations. In other words, BW projects typically require more prototyping and rebuilding based on the lessons-learned from harmonizing data from multiple sources. This iterative design should be considered a normal and vital part of the BW implementation process. There are two main types of BW projects: the new BW project or the upgrade BW project.
The new BW project typically follows the data-warehouse lifecycle shown in Figure 4.1. The upgrade lifecycle is quite different. It requires analysis of the new release and new features and their impact on the existing design. We will discuss both lifecycles in detail.
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