PERD Taxonomy Development Procedure

The companies that participate in the CCPS Process Equipment Reliability Data (PERD) Project, through representatives, are actively involved in the design and implementation of the database. Part of the database development effort relies on members from the companies to contribute to the creation of the system-level taxonomies. The process of developing taxonomy information and data fields can be complex. A rigorous, systematic, and methodical procedure was formulated to guide this effort to ensure consistency among the various groups working to develop data field and taxonomy specifications.

The Equipment Reliability Database is intended to collect data for many diverse types of equipment. The diversity of equipment in the database demands that equipment-specific fields are created to collect the appropriate data. The development of these equipment-specific data fields for all possible equipment is an arduous task. In order to expedite this task, companies contribute resources to develop the taxonomies and data field specifications for several equipment types.


The primary objective of taxonomy development is to produce a set of tables and pick lists that provide information to database programmers on how to add a specific system to the database. The procedure is designed to guide the user to successfully complete a series of tables that are used to program the data collection software for any equipment system.

The taxonomy development process consists of several steps that are iterative in nature. The overall procedural steps are shown in the Figure below:

The detailed procedure is available to authorized employees of participating companies.

It is anticipated that PERD subcommittees will continue to find new and more efficient tools and/or work processes to develop taxonomies that are of a high quality and meet the consistency of approach applicable to all equipment types. As such, the detailed document used, should be thought of as a snapshot in time intended to help the PERD subcommittees perform their functions. When new ideas are tried and prove to be successful, it is expected that the procedure will be revised so that the value gained can be shared among the subcommittees performing development work.