Glossary · Batch and process operations
Recipe unit procedure
German: Rezept-Teilanlagenprozedur
In ISA-88 batch control, a recipe unit procedure is the part of a recipe procedure that corresponds to the unit procedure level: an ordered set of recipe operations carried out within one unit.
- Batch control
- Process industry
- Standards
In one sentence
In ISA-88, a recipe unit procedure is the recipe level holding the ordered recipe operations that run within one unit.
Example
The recipe unit procedure "fermentation" is bound at run time to fermenter F-3, the unit the batch system allocated.
How it applies
- Recipe management: Recipe unit procedures often specify equipment requirements, for example a unit class, rather than a fixed unit, so the batch system can allocate any suitable unit.
- Operation: Unit allocation happens at run time; operators may be asked to confirm or choose a unit.
- Engineering: Unit classes and their capabilities must be defined consistently so that allocation works.
- Documentation: Recipe documentation should state equipment requirements and which units qualify. Batch records then show which unit actually ran each recipe unit procedure, which is important for traceability.
Recipe unit procedure vs. unit procedure
The recipe unit procedure belongs to the recipe. The Unit procedure is the corresponding procedural element in the batch run on a specific Unit (ISA-88).