ISA-88 is an international standard. It helps industries to produce in a flexible way. The standard consists of models and terminology for structuring the production process and for developing the control of equipment. ISA-88 can be applied in fully automated, semi automated and even in completely manual production processes.
S88, shorthand for ANSI/ISA-88, is a standard addressing batch process control. It is a design
philosophy for describing equipment, and procedures. It is not a standard for software, it is
equally applicable to manual processes. It was approved by ISA in 1995 and updated in 201 0. Its
original version was adopted by the IEC in 1997 as IEC 61512-1.
The current parts of the ISA-88 standard include:
- ANSI/ISA-88.01 -2010 Batch Control Part 1: Models and terminology
- ANSI/ISA-88.00.02-2001 Batch Control Part 2: Data structures and guidelines for languages
- ANSI/ISA-88.00.03-2003 Batch Control Part 3: General and site recipe models and
- ANSI/ISA-88.00.04-2006 Batch Control Part 4: Batch Production Records
- ISA-TR88.00.02-2008 Machine and Unit States: An Implementation Example of ISA-88
ISA-88 provides a consistent set of standards and terminology for batch control and defines the
physical model, procedures, and recipes. The standard sought to address the following problems:
lack of a universal model for batch control, difficulty in communicating user requirement,
integration among batch automation suppliers, difficulty in batch control configuration.
The standard defines a process model which consists of a process which consists of an ordered
set of process stages which consist of an ordered set of process operations which consist of an
ordered set of process actions.
The physical model begins with the enterprise which must contain a site which may
contain areas which may contain process cells which must contain a unit which may
contain equipment modules which may contain control modules. Some of these levels may be
excluded, but not the Unit.
The procedural control model consists of recipe procedures which consist of an ordered set
of unit procedures which consist of an ordered set of operations which consist of an ordered set
of phases. Some of these levels may be excluded.
Recipes can have the following types: general, site, master, control. The contents of the recipe
include: header, formula, equipment requirements, procedure, and other information required to
make the recipe.