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Practical Data Migration by Johny Morris

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12 LEGACY DECOMMISSIONING

In this chapter I will look at how you carry out legacy decommissioning, the ‘long tail’ problem, and how, in project close down, you create products that are of value to the enterprise.

EXECUTING THE DECOMMISSIONING DESIGN

Officially, decommissioning activities start as soon as the final decommissioning certificate is signed in the final SRP. In reality, it is kicked off as part of the cutover plan. At some point in that plan, which has to reflect both the target migration and the decommissioning design, there is a trigger to start the decommissioning design extract. Once the target migration has achieved its objectives, control is handed over from the supplier to the client and you commence implementing the decommissioning ...

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