6 PARTITIONED LEVEL STRUCTURE
218 Ch. 11 Service-Oriented Business Integration Modeling
D1.L1
D4.L2
D3.L2 D2.L2
EXHIBIT 11.7 PARTITIONED LEVEL STRUCTURE FORMAL PRESENTATION
activities reveals that layers D2.L2 and D5.L2 have been swapped. That is, the second levels in
the two layered structures have exchanged positions. Note that this modeling approach enables
description of a swapping process by recording the previous state of business formations. Such a
capability offers efficient historical tracking of the integration environment and enables analysis
of the business transformation of the organization.
D1.L1
D2.L2
D3.L3
D4.L1
D5.L2
D6.L3
EXHIBIT 11.8 SWAPPING LAYERS
Modeling Process 219
MODELING BUSINESS TIERS. Remember, a tiered structure allows the containment of various
business domain structures. This approach facilitates the logical collection of associated domains
and helps define a business identity for a domain group. For example, a tier can be made up of
business domains that offer various human resources services. Another tier can contain a group of
domains that provides customer support. We often call this domain gathering a distributed domain
cluster (discussed in detail in Chapter 10), in which associated domains are arranged in group
formations to facilitate a joint business execution by various lines of business or organizations
in an enterprise. Recall, however, that tiers do not always contain domain clusters.
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