Page 290 - Mechatronics for Safety, Security and Dependability in a New Era

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•type List — Type Identifier: AW1 "type List — "Type Identifier: AW1

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Figure 2: Status display for all works of Figure 3: Status after changing due time
specified building material type

while background color, show the actual achievement time of the WIP to pass the gate with green
background, and the estimated time of the WIP to pass the gate with blue background. The red
characters show the tardiness expected. The neighboring entries consisting upper demand line and
lower WIP line show the allocated pair. As the allocation is subject to change, the display contents
change when due dates are changed or WIP passes new gate.

Figure 2 shows the status display for one particular type of building materials, including the
parts which demands and WIPs consists of. This example shows that two building materials are
currently under processing, and one WIP recovered its tardiness at the first gate, by shorten the
duration for processing from the first gate to the second, but another WIP has delayed at the last
gate it passed and tardiness at the gate for the final inspection is expected. In order to recover
such situations, one may try to shorten the duration from the gate to the next, or may postpone
the due time for the final inspection of the building materials installation.

Figure 3 shows the case of postponing the due time of the final inspection of the unit with unit-ID
UNIT0001 for four days. As the result, the due time of the unit UNIT0001 and that of the unit
UNIT0002 are reversed, and the parts set which are going to be used for those units are exchanged.

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4 THE NFRASTRUCTURE SYSTEM
In this study, we used the system named "Glue Logic" [1,2] as the infrastructure to support
multiple-agent processing system. The Glue Logic, which is developed by the Univ. of Electro-
Communications, includes the active database and the network transparent programming environ-
ment, and supports data processing in the event driven programming paradigm. Figure 4 shows
the overall structure implemented using the Glue Logic infrastructure system.

The active database is a subclass of the database systems, of which databases have an abilities
to behave when it finds some changes of its contents, without waiting for external actions. The
change of the contents includes; (1) when data is changed, and (2) when some relations are formed.
On the other hand, the behavior executed on these incidents includes; (1) changing contents of the