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Actor

by Benedikt Liegener last modified Apr 29, 2012 14:33
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Definitions

Term:
Actor
Domain: Cross-cutting issues
Engineering and Design
(KM-ED)
Adaptation and Monitoring
(KM-AM)
Quality Definition, Negotiation and Assurance
(KM-QA)
Generic
(domain independent)
D
o
m
a
i
n
:
L
a
y
e
r
s

Business Process Management
(KM-BPM)




Service Composition and Coordination
(KM-SC)




Service Infrastructure
(KM-SI)




Generic
(domain independent)
Actors in Tropos and i* are organisational units, roles, positions or other systems. [Tropos] The monitoring problem may be characterized from the point of view of the roles, or Monitoring Actors, involved into monitoring process [CD-JRA-1.2.2]. One can identify the following types of actors:
  • Requestor characterizes the stakeholders, who define the requirements to the system, or more precisely, to the monitoring subject.
  • Designer is responsible for defining the monitoring properties corresponding to the requirements of the requesters, and, if necessary, to design the corresponding monitoring approaches.
  • Provider represents a role in the ecosystem that owns or provides the monitoring functionalities.
  • Consumer is interested in the results of monitoring, i.e., aims to discover important monitoring events and react to them, triggering requirements for adaptation.
We remark here also that the same physical entities may have different logical roles. Indeed, the monitoring results may be consumed by the same stakeholder who defines the monitoring requirements.

From the adaptation perspective we distinguish between such roles as Adaptation Requestor, Adaptation Designer, Adaptation Initiator, and Adaptation Executor. When certain roles are performed by the Service-Based Applications (SBA) or the environment autonomously, we speak about self-adaptation. Otherwise, the adaptation is referred to as human-in-the-loop adaptation. When the human plays a role of the adaptation executor, we can speak about manual SBA adaptation, performed, e.g., at design-time. [CD-JRA-1.2.2]

A participant in an action or process [Oxford]

 

Competencies

 

Scenarios

 

References




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