Page 271 - Sensors and Control Systems in Manufacturing

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Cha p te r
F i v e

which may well lead to a turnaround. Sensors and control systems in
manufacturing are a powerful tool for implementing CIM. Current
world business leaders view CIM as justifying automation to save
our standard of living. The successful implementation of CIM
depends largely on creative information gathering through sensors
and control systems, with information flow as feedback response.
Information gathering through sensors and control systems is imbed-
ded in CIM, which provides manufacturers with the ability to react
more quickly to market demands and achieve levels of productivity
previously unattainable.
Effective implementation of sensors and control subsystems
within the CIM manufacturing environment will enable the entire
manufacturing enterprise to work together to achieve new business
goals.
Database management systems will continue to manage large
data volumes. Thus, efficient algorithms for accessing and manipu-
lating large sets and sequences will be required to provide acceptable
performance. The advent of object-oriented and extensible database
systems will not solve this problem. On the contrary, modern data
models exacerbate it: In order to manipulate large sets of complex
objects as efficiently as today’s database systems manipulate simple
records, query processing algorithms and software will become more
complex, and a solid understanding of algorithm and architectural
issues is essential for the designer of database management software.
This survey provides a foundation for the design and implementation
of query execution facilities in new database management systems.
It describes a wide array of practical query evaluation techniques for
both relational and post-relational database systems, including itera-
tive execution of complex query evaluation plans, the duality of sort-
and hash-based set matching algorithms, types of parallel query
execution and their implementation, and special operators for emerg-
ing database application domains.

5.2 The CIM Plan
This chapter will address implementation of a CIM plan through the
technique of modeling.
A model can be defined as a tentative description of a system or
theory, and accounts for many of the system’s known properties. An
enterprise model can be defined (in terms of its functions) as the func-
tion of each area, the performance of each area, and the performance
of these areas interactively. The creation of a model requires an accu-
rate description of the needs of an enterprise.
In any manufacturing enterprise, there is a unique set of business
processes that are performed in order to design, produce, and market
the enterprise’s products. Regardless of how unique an enterprise or