In This Chapter
Comparing data warehousing projects to other application development efforts
Looking into some issues that come with secondhand data
Getting someone at the top to support your data warehousing project
Keeping a large data warehousing project on track
Psst! Yes, you. Do you want to know a secret? No, this isn't the Beatles song; this secret is about data warehousing projects and how you can almost guarantee success.
I thought that would get your attention! Listen closely because I sum up this secret in three sentences:
Data warehousing projects are remarkably (about 95 percent) similar to any other application development project.
The 5 percent that's different is because of two key items: an unclear method for identifying requirements and scope, and the reliance on data from other applications' databases and files (as discussed in Chapter 1).
By applying your organization's application development "best practices" to the 95-percent similar portion (as though this project is just like any other) and by following a few guidelines to handle the other 5 percent, you can almost certainly develop your data warehouse successfully.
Way back in the mid- and late 1970s, when disco reigned supreme, IT professionals realized that certain things made sense and other things didn't in developing computer applications and systems. One ...