Glossary · Batch and process operations
Procedural element (ISA-88)
German: Prozedurelement
In ISA-88 batch control, a procedural element is a building block for procedural control, defined by the procedural control model: a procedure, unit procedure, operation or phase.
- Batch control
- Process industry
- Standards
In one sentence
In ISA-88, a procedural element is a building block of procedural control: a procedure, unit procedure, operation or phase.
Example
The batch report lists start and end times for every procedural element, from the procedure down to each phase.
How it applies
- Engineering: Procedural elements exist both in recipes (recipe procedural elements) and in equipment control (equipment procedural elements); they are linked when a control recipe is executed.
- Operation: Batch systems report states and events per procedural element, which structures the Batch record.
- Modeling: Treating procedural elements as typed objects makes recipe data exchangeable between systems, for example through XML schemas derived from ISA-88.
- Documentation: The documentation team can use the procedural element levels as metadata for process descriptions and SOPs, so readers find information about a specific phase or operation directly.
Recipe procedural element vs. equipment procedural element
A recipe procedural element, such as a Recipe phase, describes what the recipe requires. An equipment procedural element, such as an equipment Phase (ISA-88), is the control logic in the equipment that performs it.