The most popular method
for assessing service granularity factors is the granularity matrix tool, which depicts generalization
relationships between inspected analysis services. More about granularity metrics and maps
can be found in Chapter 7 in the section on Granularity Analysis.
Reusability Assessment. This is the proper time to encourage enterprise asset reusability. Therefore,
major considerations should be attributed to the method used to position conceptual services
in the association hierarchy tree. The rule of thumb suggests that concepts with higher reuse
potential should be placed higher on the tree. This method, however, may not reflect the true
reusability and capacity levels of the planned services. It may require a number of design iterations
to perfect this process and provide a better reusability assessment.
Do service granularity levels correspond to their reusability potential? Granularity factors
do not always correlate to service reusability factors. In some cases, very coarse-grained services
may not be as useful and reusable as finer-grained entities. Thus, there should be a fine balance
between granularity levels and reusability factors of services.
Consumption Expectations. Consumption of services is crucial to the ability of services to
function and comply with service-level agreements (SLAs). Conceptual services, however, are
Conceptual Service Association Process 99
not consumed entities as of yet, because they are intangible and are still regarded as abstractions.
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