Failure effect

Failure Cause. The failure cause is the physical, chemical, electrical, thermal, or other design deficiency which caused the failure. The agent, physical process, or hardware deficiency causing the failure mode must be identified, ie, what caused the failure for each failure mode. There may be more than one cause. Failure Fffect. The failure effect is the local effect on the immediate component/subsystem and the global effect on system performance/operation. In commercial products, the effect on the customer, ie, the global effect, must be addressed. 

Common Mode Failure An event having a single cause with multiple failure effects, which are not consequences of each other. 

Knilurc Mailt (.Hu es Operating Mode Failure Effects Failure Detection Method Mitigation Sever- ity Remarks... 

Div. Comp. System Div. Comp. Failure mode Failure effect Detection Diagnosis Comments... 

The analysis methods are similar for all external events probability of the external event, probability of failures, effects of failures on safety systems, and estimating the effects of failures for the workers, public and environment. 

A uniform stress field must exist over the entire gage-section volume to eliminate volume-based statistical failure effects (e.g., a realistic distribution of ordinary defects must exist for the test to be representative of the actual material). 

A uniform definition of a failure and a method of classifying failures is essential if data from different sources are to be compared. The anatomy of a failure includes the initiating or root cause of a failure that is propagated by contributory causes and results in a failure mode—the effect by which a failure occurs or is observed. Modes include failure to operate, no output, failure to alarm on demand. The end result of a failure sequence is the failure effect, such as no fluid is pumped to the absorber, or a tank overflows. As discussed in Appendix A of IEEE Std. 500-1984, only the equipment failure mode is relevant for data that are needed in a CPQRA. The failure model used in this book is based upon those in the IEEE publication and IPRDS. ... 

H Failure Effects System ftedl/cgt/- OnIv 2 AlR-cksnntls (Hours Lost - O ) ... 

FAILURE MODE CAUSE(S) OPERATIONAL MODE FAILURE EFFECTS FAILURE DETECTION METHOD COMPENSATING PROVISIONS SEVERITY CLASS REMARKS/ ACTIONS... 

Limitation of Effects of Failures Effects of failures can be limited by equipment design or change in reaction conditions, rather than by adding protective equipment. For example ... 

A very important contribution in this socio-technical era is made by Reason (Reason, 1990). He made a distinction between active failures, and latent conditions. The active failures are in general failures made by those at the sharp end of the accident causation (e.g. technical and human failures). Effects are felt almost immediately. Latent conditions are removed in time and space from the sharp end of the accident causation (e.g. organizational and technical failures) creating conditions for active failures to be made. A strict boundary between both concepts cannot be made and in reality can be seen as a sort of sliding transition. Here, the two concepts are separated... 

Having determined those parameters that need to be assessed, the potential failure effect for each can be described. 

Instrument module Potential failure mode for the specified parameter Potential failure effect... 

Now that the potential failure effect has been identified the impact, level of occurrence, and the ease of detection of these failures need to be assessed by using the rating scales given in Table 2. 

Khogeer, A.S. (2005) Multiobjective multirefinery optimization with environmental and catastrophic failure effects objectives. Ph.D. Thesis. Colorado State University. 

Patterson JH, Adams KF Jr, Applefeld MM, Corder CN, Masse BR. Oral torsemide in patients with chronic congestive heart failure effects on body weight, edema, and electrolyte... 

Identify Potential Failure Modes, Failure Effects, and Potential Causes... 

Now ask, What can go wrong with this component The answer is your failure mode. Then ask, If this does go wrong, how will it affect customers This is your failure effect. Finally, brainstorm the possible reasons for your failure mode. These are your potential causes. Keep in mind that one item or function can have multiple potential failure modes, and each failure mode can have multiple potential causes. 

Cases A. Recombinant human erythropoietin treatment in chronic renal failure effects on hemostasis and vasculature. Drugs Today (Bare) 2000 36(8) 541-56. 

Timmis AD, Smyth P, Jewitt DE. Milrinone in heart failure. Effects on exercise haemodynamics during short term treatment. Br Heart J 1985 54(l) 42-7. 

R. Bellardinelli, D. Georgiou, G. Cianci, A. Purcaro, Randomized, controlled trial of long-term moderate exercise training in chronic heart failure effect on functional capacity, quality of life, and clinical outcome, Circulation 99, 1173-82 (1999). 

Patients in stage A do not have structural heart disease or symptoms but are at high risk for developing heart failure because of the presence of risk factors. The emphasis here is on identification and modification of these risk factors to prevent the development of structural heart disease and subsequent heart failure. Commonly encountered risk factors include hypertension, diabetes, and coronary artery disease. Although each of these disorders individually increases risk, they frequently coexist in many patients and act synergisticaUy to foster the development of heart failure. Effective control of blood pressure reduces the risk... 

Braun MU, Rauwolf T, Zerm T, Schulze M, Schnabel A, Strasser RH. Long term biventricular resynchronisation therapy in advanced heart failure effect on neurohormones. Heart 2005 91 601-5. 

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