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10 Ch. 1 Introduction
mechanisms, enhancements to service mediation facilities, or even the improvement of a security
model. This typically introduces an array of new service responsibilities and the commencement of
capabilities that can fill in the gaps that are found after deployment and distribution of services.
SERVICE DISCOVERY APPROACH. The process of service discovery should be guided by organiza-
tional best practices and standards. Without a lucid governance direction, the service identification
venture may take superfluous turns that typically prolong the service development effort and hin-
der vital deliverables that are required for service deployment to production. Therefore, a discovery
method should be carved out to channel the service identification efforts and encourage practition-
ers to focus on the keystone solutions. Moreover, this how-to instruction manual should identify the
starting point, milestones, and end point of the discovery process. The method of ascertaining new
services or employing existing legacy applications to offer a remedy to an organizational concern
should also elaborate on the imperative artifacts that are needed for the service discovery process.
To learn more about these approaches, refer to the Service Identification Patterns section later in
this chapter, and for an elaborated discussion study Chapters 5 through 10.
Exhibit 1.4 illustrates the five different paths for service discovery. These are orientations
devised to facilitate efficient service identification and help practitioners to broaden the search for
services that offer solution capabilities to business or technical problems. As apparent, the depicted
five directions represent distinct patterns for service discovery (note the indicated page number that
is positioned in parenthesis next to each pattern):
1. Top Down (71,89). This discovery approach advocates deriving new services from busi-
ness processes and their underpinning activities. As an alternative, this method of service
identification also calls for ascertaining conceptual services that stem from solution ideas
and software product attributes.
EXHIBIT 1.4 SERVICE-ORIENTED DISCOVERY PATTERNS