ANSI/ISA-S88.01-1995 3
Preface
This preface as well as all footnotes and annexes are included for informational purposes and are
not part of ANSI/ISA-88.01-1995.
This standard has been prepared as part of the service of the ISA, the international society for
measurement and control, toward a goal of uniformity in the field of instrumentation. To be of real
value, this document should not be static but should be subject to periodic review. Toward this
end, the Society welcomes all comments and criticisms and asks that they be addressed to the
Secretary, Standards and Practices Board; ISA; 67 Alexander Drive; P. O. Box 12277; Research
Triangle Park, NC 27709; Telephone (919) 990-9227; Fax (919) 549-8288;e-mail:
standards@isa.org.
The ISA Standards and Practices Department is aware of the growing need for attention to the
metric system of units in general, and the International System of Units (SI) in particular, in the
preparation of instrumentation standards, recommended practices, and technical reports. The
Department is further aware of the benefits to USA users of ISA standards of incorporating
suitable references to the SI (and the metric system) in their business and professional dealings
with other countries. Toward this end, this Department will endeavor to introduce SI-acceptable
metric units in all new and revised standards to the greatest extent possible.
The Metric Practice
Guide
, which has been published by the Institute of Electrical and Electronics Engineers as
ANSI/IEEE Std. 268-1992, and future revisions, will be the reference guide for definitions,
symbols, abbreviations, and conversion factors.
It is the policy of ISA to encourage and welcome the participation of all concerned individuals and
interests in the development of ISA standards, recommended practices, and technical reports.
Participation in the ISA standards-making process by an individual in no way constitutes
endorsement by the employer of that individual, of ISA, or of any of the standards, recommended
practices, and technical reports that ISA develops.
This standard is structured to follow the IEC guidelines. Therefore, the first three sections
discuss the
Scope
of the standard,
Normative References, and Definitions
, in that order.
Section 4 is entitled
Batch Processes and Equipment
. The intent of this section is to discuss
batch processing and the batch manufacturing plant. Things that are involved in batch
manufacturing (e.g., batch process classification, equipment, and processes) are described in
this section. The models and terminology defined in this section provide a foundation for
understanding the application of batch control to the batch manufacturing plant in Sections 5
and 6.
Section 5 is entitled
Batch Control Concepts
. The intent of this section is to discuss key aspects
of batch processing and batch manufacturing plants. This is where control is finally introduced to
physical equipment, and the concept of equipment entities is introduced. Recipes are introduced
in Section 5. The concepts of Allocation and Arbitration, Modes and States, and Exception
Handling are introduced in this section so that they can be applied to the discussions in
Section 6.
Section 6 is entitled
Batch Control Activities and Functions
. The intent of the models and
terminology introduced in this section is to establish the necessary control activities that are
needed to address the diverse control requirements of batch manufacturing. The concept of a
Control Activity Model is introduced in this section. Each control activity from the Control Activity
Model is discussed in terms of the individual control functions that are needed to address the
batch processing, manufacturing, and control requirements of the previous two sections. Note
