Page 266 - Mechatronics for Safety, Security and Dependability in a New Era

Ch50-I044963.fm Page 250 Tuesday, August 1, 2006 4:05 PM
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250 Page 250 Tuesday, August 1, 2006 4:05 PM

Figure 3: A Screenshot of a Scope Model for a Hotel

An RSP can be a target parameter in sei'vice design, but an observable and controllable parameter
should be chosen as an RSP.

Then, a Contents Parameter (CoP) is a parameter which causes a receiver's state change directly.
Similarly, a Channel Parameter (ChP) is a parameter which indirectly contributes to a receiver's state
change through CoP. These parameters are introduced to represent subjective nature of service; even
for an identical service, there are recognition differences between sei'vice receivers.
In many cases, supplying services requires an environment with a complex structure, in which a
provider, a receiver, and several intermediate agents interact each other. A service can involve a chain
of subservices. A flow model is a sub model of service and represents those multiple complex
structure as a chain of agents who provide/receive a service (Shimomura (2003)). The flow model
includes descriptions of a service in terms of a target range which are called scope models. The value
and the cost of a sei'vice are expressed as the total changes of RSPs contained in the scope model.
A view model represents a concrete method to realize the change of an RSP of a receiver. A view
model describes functions of the channels and the contents which realizes a change of an RSP. This
functional information includes a function name (FN), a function parameter (FP) that is the main
parameter of the function, and a function influence (Fl) that is the main influence to FP.

THE PROTOTYPE OF A SERVICE CAD

The prototype system of a service CAD, which is called "Service Explorer," has been developed. It is
necessary that Service Explorer has the following five functions;

(1) To allow a user to input and edit a service model,
(2) to display component elements that designers focus on,