CCPS Taxonomy Structure

Taxonomy No. 3.3.7.2.1.1 Equipment Description ROTA flNG EQUIPMENT- PUMPS MOTOR DRIVEN-PRESSURE-CENTRIFUGAl  

Opcraling Mode ALTERNATING Process Severity (j kj jowN 

Many data cells in the CCPS Taxonomy use equipment boundaries found in available generic data sets in which equipment and service is similar to that in the CPI. The boundaries established for other data cells were generally combinations of normal equipment modules—such as pump, seals, coupling, motor and base plate, or refrigeration units—and functionally interdependent basic and auxiliary components, such as motor controllers. Boundaries may change as greater amounts of equipment reliability data become available. 

The service description is the second part of the taxonomy structure. It includes two levels—the operating mode and the process severity. The operating mode describes how the equipment is operated. The three modes used, running, standby, and alternating, are defined as follows  

The process severity characterizes the process medium, the material being handled by the equipment. There are four categories in the taxonomy, defined as follows  

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Chapter 5—CCPS Generic Failure Rate Data Base Contains tables of generic process equipment reliability data that are structured by the CCPS Taxonomy. The data are extracted from data resources in Chapter 4. The chapter includes a discussion of the selection, treatment, and presentation of the data in the Tables. 

This chapter reviews the structure, rationale, and method used for the development of the CCPS Taxonomy and explains how to use it. Key elements of the CCPS Taxonomy that are explained include equipment, service, and failure description. The CCPS Taxonomy is listed in Appendix A. 

The hierarchical structure of the CCPS Taxonomy is divided into three major parts equipment description, service description, and failure description. Figure 3.1 illustrates this organization. 

Section 5.4 describes the use of the CCPS Generic Failure Rate Data Base. Lastly, Section 5.5 contains tables of data in the Generic Failure Rate Data Base, organized by the numbers used to structure the CCPS Taxonomy. 

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