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What is Enterprise Architecture (Process-Centric Enterprise Architecture…
What is Enterprise Architecture
Uses of EA
top of the pyramid
goals are set
strategy is determined
competitors are monitored
new opportunities are identified
second level of the organization
focused on divisions and departments
used a pyramid diagram - Business Process Architecture
Process-Centric Enterprise Architecture
Defination
emphasize how work is actually done, and, only
secondarily, how software systems are used to implement
specific portions of the work
Rely on this type of EA is :
interested in the processes
performed by employees
entire processes function
as efficiently as possible and that the people and system
work together
3 approch :
good measures of process success
process management
the analysis of costs
impact of emphasis on providing models
allow business managers to
understand how their organization is doing
to make
decisions about changes that will then lead to appropriate
modification in supporting human and software systems
IT-Centric Enterprise Architecture
alternative to the process-centric
Primary function is :
provide an overview of how all of the various IT models and resources in the
organization work together
Spewak’s Enterprise Architecture Planning
Spewak goes beyond Zachman by including information about Michael Porter’s Value Chains
makes it clear that
business processes should be modeled in their own right
Spewak’s approach is a significant step toward
a process-centric enterprise architecture
Model Driven Architecture (MDA)
focused on creating a technical modeling system that will facilitate moving information from one model to another and moving modeling artifacts from one software tool to another
concerned with enlisting modelers in an effort
to define metamodels
does not limit the models that can be used at
each layer
the top-level models are to be
developed by business managers
to drives
development of logical models (PIM)
physical models (PSM)
Enterprise Architecture Tools