Failure Modes Effects Analysis case studies

A case study is carried out for a pig launcher that is widely used in oil and gas facilities during pigging operations. Failure Mode, Effects and Criticality Analysis (FMECA) approach is used to identify the potentially critical human actions/interventions based on guided brainstorming. After that, these identified actions/interventions analyzed using conventional FMECA approach and MEDIA. FMECA can provides a qualitative results, while MEDIA can provides quantitative results and also demonstrates the influence of an organization on human reliability. 

A mixture of qualitative and quantitative methods was used in this work. These include reliability analysis, eapital investment costs, safety, feasibility and environmental impaet assessment (ElA). Tools used include failure mode and effect analysis (FMEA), environmental impaet assessment, and risk analysis. FMEA was used to conduct a reliability analysis, EIA was used to calculate the concentration of the flared gas eomposition partieles affeeting the local environment, and risk assessment was employed to find out the hazards and exposure in the case study in order to assure safety. Cost estimation was used to ealculate the capital investment cost for each option considered. Information and expert opinions were eaptured through interviews and questionnaires. 

The Gulf of Mexico has between 5000 and 6000 platforms—many of them small and in shallow water. It is simply not economically feasible to write a safety case for each platform. Arnold (2010) uses the example of the response to a proposed requirement from the MMS to carry out a Failure Modes and Effects Analysis (FMEA) on each facility. Instead of doing this, generic FMEAs and HAZOPs (Hazard and Operability Studies) were carried out on 13 facilities. This was done because the process equipment and instrumentation are very similar to one another for these platforms. 

Adherence to GMP guidelines already offers a sound basis for avoiding microbial contamination or other products mishap. However, in some cases it is also wise to carry out special manufacturing process fault prevention analyses. Similar approaches have already proven their worth in other industrial sectors, such as automobile and foodstuffs. The conceptual basis for such studies are FMEA, Failure Mode and Effects Analysis-Fehlermoglich-keits- und -Einflussanalyse (DIN 25 448), and the HACCP concept (Hazard Analysis Critical Control Points, (Pierson, 1993). 

A spool valve in an aviation hydraulic actuator is chosen as a case study to demonstrate the proposed PoF-based component failure behavior modeling approach. As discussed in Example 1, the performance parameter of the spool is its clearance. According to the result of failure mode, mechanism, effect analysis (Liao, 2013), the spool is subjected to two failure mechanisms, i.e., adhesive wear and abrasive wear. 

Chen, Ping-Shun, and Ming-Tsung Wu. A Modified Failure Mode and Effects Analysis Method for Supplier Selection Problems in the Supply Chain Risk Environment A Case Study. Computers Industrial Engineering 66, no. 4 (2013) 634-642. 

The system safety case of corrrse varies from sector to sector. The core of a nuclear system safety case is (i) a deterministic analysis of the hazards and farrlts which could arise and cause injury, disability or loss of life fiom the plarrt either on or off the site, and (ii) a demonstration of the sufficiency and adequacy of the provisions (engineering and procedural) for ensuring that the combined frequencies of such events will be acceptably low. Safety systems will feature amongst the risk reducing provisions comprised in this demonstration, which will thus include qualitative substantiations of compliance with appropriate safety engineering standards supplemented (where practicable) by probabihstic analyses of their reliabilities. Other techniques which may be used for stracturing the safety case include fault and event tree analysis, failure mode and effects analysis (FMEA) and hazard and operability studies (HAZOPS). 

In this paper, we propose and investigate formal concepts that aim to overcome this bias. They support the construction of FMEA tables solely based on the system model and the failure modes, i.e., without requiring the set of effects as input. More concretely, given a system specification in the Architecture Analysis and Design Language (AADL), we show how to derive relations that characterize the effects of failures based on the state transition system of that specification. We also demonstrate the benefits and limitations of these concepts on a satellite case study. 

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