The use of Technical Capability models is not something I have seen a lot of use of, which is a little unfortunate as they can provide tremendous insight into an organizations IT needs.
Typically you want to use the Technical capability model to be used in conjunction with a business capability model, and this is where things can get tricky as developing the business views can take time. I came across this short video which focuses on the more business aspect but helps explain the ideas behind the models:
Note how the model is largely groups of capabilities that happen in the business. Underlying this kind of diagram you would have a brief explanation of each capability. If you want to go all out on EA modelling then you can link the capabilities to the documented associated processes etc.
Independently, the ideal is to then identify the technical capabilities that are likely to be needed. This will provide a similar looking model. The technical capabilities are probably best drawn from industry best practices, and specific business needs. The model should be completely product agnostic. The real value comes in by then mapping the technical capabilities to which business capabilities use. Read the complete article here
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