To better understand this concept, see Exhibit 10.5. It depicts the combined tiered and layered
business domain structures. The small-business layered structure is composed of three domain
layers: the small-business domain, the small-business credit domain, and the small-business
credit card domain. Note that this formation is not only regarded as a layered structure but
appears to be an autonomous tier in the overall depicted business integration environment.
The other tier, investments (on the bottom right), is also a domain-layered structure made
Small Business
Domain Small Business
Credit Domain
Small Business
Credit Card
Investments
Domain Investment
Accounts
Domain
Mutual Funds
Accounts
Domain
A three layer domain.
Also an autonomous
tier.
A three layer
domain. Also an
autonomous tier.
Human
Resources
Domain
Employee
Benefits
Domain
Business tier
EXHIBIT 10.5 COMBINED TIERED AND LAYERED BUSINESS INTEGRATION ENVIRONMENT
198 Ch. 10 Business Architecture Structural Perspectives
up of three layers: the investment domain, the investment accounts domain, and the mutual
funds accounts domain. Finally, the third tier depicted on the bottom left hand side is comprised
of two domains: human resources domain and employee benefits domain??”these are not
domain layered formations. Thus, it is common to find a mixture of domain-layered constructions
and tiered formations that coexist and collaboratively provide viable solutions to business
concerns.
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