Build-in and custom classification dictionaries (Taxonomies)

Owned by Piotr Wierzchowski
Last updated: Nov 17, 2022
2 min read

Applies to LogiX v. 3.10 and above

 

One of the challenges in implementing a universal software platform in a given organization is adapting it to its specific requirements without sacrificing overall consistency. This applies to both the application interface and data organization.

In the domain of LogiX examples are:

  • Machines Downtimes classification, for purpose of detailed OEE losses reporting

  • Machines Downtimes classification which guides users during downtime registration

  • Classification of machines in terms of their function or role in the production process

  • Classification of machines in terms of their mechanical or electrical characteristics

 

A core feature of the LogiX platform addressing these issues is a concept called "Taxonomies".

Taxonomies are arbitrarily defined hierarchical dictionaries for systematic organization and classifications of facts and entities represented in LogiX. Examples are:

  • Grouping production lines into categories according to organizational aspects other than ISA-95 factory structure (Site/Area/Line/Machine).

  • Grouping downtimes into categories according to organizational resources needed to resolve them.

  • Grouping machines into categories according to their kind and functional characteristics (e.g Sorters, Fillers, Packers, Labelers)

 

Each taxonomy is defined by:

  • taxonomy structure - (levels list or levels tree)

  • taxonomy content - hierarchy of nodes assigned to levels

    Example of a taxonomy (ISA95 taxonomy for a sample factory):

 

System classifications that are build-in into LogiX are also implemented and exposed as taxonomies. This includes:

  • standard ISA-95 factory structure (Site/Area/Line/Machine) which is obligatory for each Line and Machine configured in Logix. This taxonomy is used also to uniquely identify assets (i.e. while pointing root cause machine for line downtime). Levels of this taxonomy (Site/Area/Line/Machine) are read-only and cannot be altered.

  • standard production event classification used to calculate OEE. This ‘Loss Type' taxonomy by default is defined as a simple flat list of five nodes (Utilization Loss, Availability Loss, Performance loss, Quality loss, Work) but can be further detailed by adding subsequent nodes to support reporting needs in a given organization (e.g. Availability Loss can have sublevels for ‘Breakdowns’, 'Process failures’ etc).


OEE loss type taxonomy used in PackOS configuration

Configuration of "problems" in terms of impact on OEE is defined by assigning a given problem to a taxonomy leaf, while Tags are still used to configure other aspects of signal processing (in previous versions, each configured factory event ("problem") was assigned to a given category using dedicated 'Tags')