SAP Asset Performance Management – FMEA (Failure Mode and Effects Analysis)

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Introduction

Failure Mode and Effects Analysis (abbreviated as “FMEA”) is one of the highly structured systematic techniques for failure analysis, which was known as developed by reliability engineers in the 1940s to study problems in the U.S. military systems.

IEC60812 states “Failure Mode and Effect Analysis (FMEA) is a systematic procedure for the analysis of a system to identify the potential failure modes, their causes and effects on system performance, performance of the immediate assembly and the entire system or a process”.

It is a widely adopted methodology which can contribute to risk identification, effects prediction, and potential cause analysis, which are all integral to minimize operational disruptions and overarching safety concerns in an industrial setting.

FMEA in SAP Asset Performance Management

SAP Asset Performance Management (abbreviated as “APM”) supports to develop maintenance strategies considering critical failure with the help of standard reliability methodologies such as Reliability Centered Maintenance (RCM), Failure Mode and Effects Analysis (FMEA) etc. and in recommending mitigation actions. You can read the Asset Strategy Overview blog for more details.

RPN method used by FMEA

In this blog I will introduce how you can use FMEA, which is provided in SAP APM. It is essential to understand that FMEA uses RPN (Risk Priority Number) method for risk assessment. As depicted in a diagram below, it is required first to identify a failure mode, then define the severity number (SEV), the probability number(OCCUR), and the detection number (DETEC). When multiplying all three factors, SEV*OCCUR*DETEC, you get RPN (Risk Priority Number) score. This indicates that the higher the RPN value, the greater the risk.

Picture 1: Steps of calculating RPN (Risk Priority Number) in FMEA

How to use “Manage FMEA Assessments” 

To begin, navigate to the "Manage FMEA Assessments" in SAP APM. This app resides under "Asset Reliability Engineering". I will go through the process step by step. 

       1. Prerequisite 

In order to perform FMEA we need to have a technical object (abbreviated as “TO”, Equipment master data) replicated from SAP S/4HANA and this TO should include "Failure Data Profile", which is a failure catalog defined in SAP S/4HANA. 

2. Create New Assessment 

You can create a FMEA assessment with a technical object. 

3. Assign Failure Mode 

Here you have options to start with maintainable items or functions or functional failures for making the hierarchy if necessary. "Failure mode" is a term that describes the various ways something can fail.

You can see the diagram below how a technical object (e.g. Booster pump) is structured with failure data and how this is mapped with catalog profile from SAP S/4HANA. “Functions” and “Functional Failures” are used only in APM and you can create the codes when not existing during FMEA process. 

Picture 2: This diagram shows how a technical object is structured with failure data and how this is mapped with catalog profile from SAP S/4HANA.

4. Assign Failure Effects

This step helps to predict what happens when the failure occurs. 

5. Assign Causes

In this step we need to identify what cause the failure and we will also determine the occurrence number and the detection number as I explained above in order to calculate RPN value. 

For example, you identified two causes for this failure. One is ‘Overload’, and the other is ‘Cavitation’. Then you determine how often it occurs and the likelihood of current control can detect the failure by using the pre-defined scale. 

When you also determine the severity scale, the RPN is calculated by Occurrence score*Detection Score*Severity. 

Occurence score : frequency of the failure to occur
Detection score : likelihood of current control to detect the failure

Max RPN will show up against this Failure Mode. 

Based on this result, now you can create recommendations to mitigate risks. 

6. Create Recommendations

These recommendations can include preventive measures, corrective actions, proposals for redesign or other actions aimed at mitigating risk. It is essential to prioritize based on their RPN scores to ensure that the most critical issues are addressed first. 

When creating a recommendation, you can also assign additional failure data to it to specify. You can have multiple recommendations and these recommendations will be listed in “Manage Recommendations” app. You can also add more information in the app.  

Regarding more details of “Manage Recommendations”, I will recommend you to read this blog Recommendation Management.

You can also watch this video to see the explained process of FMEA. 

What's more  

FMEA can be extended to FMECA (Failure Mode, Effects and Criticality Analysis) to include a means of ranking the severity of the failure modes to allow prioritization of countermeasures. This is done by combining the severity measure and frequency of occurrence to produce a metric called criticality.

SAP Asset Performance Management released the extended feature of FMECA in SAP Asset Performance Management 2405. You can check out the demo video here. 

For more info on SAP Asset Performance Management 

• Check out all forthcoming webcasts here. 
• Watch the replay of our recent webcasts
• Subscribe to What's New on the SAP Help Portal
• SAP Continuous Influence session 
• The collection link blog