Heterogeneous data is often the state of the average IT organization. The merging of two separate enterprises presents a quantitatively greater and more complex data integration problem, but not one essentially different in kind. The data warehousing group will have cross-functional technical and organizational skills to offer to the entire merged, consolidated enterprise. These skills can be exploited for the good of the new, larger whole.

The merger of two firms presents challenges and will require strong executive leadership to reduce the risks of marching and counter-marching. If the executives of the firms believe they are merging to provide complementary operations and IT is working at consolidation (or vice versa), then serious misalignment will result. As a part of the IT infrastructure, the data warehouses will be subject to the same prioritization, triage and consolidation as the other parts of the IT organization. However, the one significant difference immediately evident is that the cross-functional data warehousing team will now include members from both of the organizations. In the instance where some systems (and people) are being eliminated, the utmost tact and professionalism are required to obtain detailed background on data warehousing design, technology and operations from those in a sunset situation.

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