Introduction

This exchange enables the transmission of the data exchange set (DEX) Fault States

The Fault State Dex deals with how a product can or may degrade in its functions. It is usual for the set of fault states to be derived from a formal analysis process such as Failure Modes and Effects and Criticality Analysis (FMECA)

The analysis is an iterative process, potentially changing at each stage of the products life cycle. The initial analysis ideally conducted as early as possible in the product life cycle.

The formal analysis, such as FMECA, is conducted with the following objectives:

• Feedback of required changes to design;
• Evidence of safety and reliability have been given due consideration in the product design;
• Identification of support drivers, which are the justification for the generation of maintenance task descriptions.