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Your upgrade project should take you where you want to go; you need to minimize total cost of conversion during the upgrade and then total cost of ownership after. Towards this end, GM sells and supports a programmable software re-engineering tool and related services. We help our customers re-implement large, complex business applications in .NET according to their new designs. The thing that limits the a new design is the vision, capability and capacity of resources available, not the tool. developers creating the new design.
Some source codes require a lot more transformation to fit the desired design. However, we have found that given fixed capacity and resources, teams can complete a more ambitious upgrade if they use our tools and methods than if they work only manually (for more discussion, see this: http://www.greatmigrations.com/en/resources/myth-busters.aspx).
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