Unless there is a demonstrable benefit to the business it will always be regarded as an overhead and eventually no longer used.
Assessing an Enterprise Architecture’s effectiveness requires first obtaining relevant base-lined quantitative measures against which the outcomes generated by the Enterprise Architecture can be compared.
These measures should ideally be established, as they should with any project, when building the business case supporting the need for an Enterprise Architecture. The measures should reflect what is important to business and reflect what they wish to achieve in having an Enterprise Architecture.
Indicative measures such as:
- % increase in re-use
- % decrease in re-work
- % decrease in in exemptions (to policies or standards)
- % decrease in time it take to make a decision (comparing decisions with comparable levels of complexity)
- % reduction in duplication of data
all provide some indication of benefit that can be given to the business as a direct consequence of having an Enterprise Architecture