Operational modes and Catalog options

latest update: 2018-11-10    

Introduction

In plant design we sometimes have to model "operational modes", whereas in product catalogs we often see "options". Both are in fact identical.

An operational mode is a way the facility must function, and hence be configured.

EXAMPLES 

  1. A plant must be able to accept two different feed stocks as input;
  2. A TV set must be able to handle 100 channels;
  3. A computer must be able to handle a range of programs.

Options in a product catalog are ways in which a product may be configured.

EXAMPLES

  1. A PUMP model comes in a series of sizes, materials, etc.
  2. A car model comes in a series of colors, engine types, accessories, etc.

Modeling

A generic model with three variants:

The ClassOfPhysicalObject (1) covers everything that is common or standard for all options, so without any option.

The ClassOfPhysicalObject's (2), (3), and (4) are defining the options (there may be fewer or more options of all different types, car catalogs usually are that option-rich).

Each of (2), (3), and (4) inherit the common definitions of (1).

Now we have to collect all selected options (here (2) and (4)) by classifying them with the same instance of EnumeratedSetOfClass (5).

Finally we create a union of those enumerated classes (2) and (4) , thus eliminating the multiplicity of the inherited information of (1), to result in what we were after: the configured instance of COPO.

The definition of the options is done with templates, as shown below for the configuration of a pump model:

 

Modes of Operation

Information about Modes of Operation can be anything, from different Properties of a stream, or open or closed valves, to different line-ups for Operations and Regeneration, etc.

All information can expressed in terms of templates, which are classes, and hence use the above model. An example will be published in due time.