Procedure of FMEA

Posted by Wan Naza at 12:18 AM
The process to lead a FMEA is direct.
The basic steps are:

1. It describes producto/proceso and his function. An understanding of the product or the process under consideration is important to have articulated clearly. This understanding simplifies the process of the analysis helping to the engineer to identify those applications of producto/proceso that lower within the predicted function and that they lower outside.

2. It creates a block diagram of the product or proce it to it. A block diagram of producto/proceso must be developed. This diagram demonstrates to important components or passages of process like blocks connected together by the lines that they indicate how the components or the steps are related. The diagram demonstrates to the relations logics of components and establishes a structure around which the FMEA can be developed. Establish a system of the codification to identify elements of the system. The block diagram is due to always include with the FMEA form. The head in the worksheet of the FMEA form finishes: Producto/Sistema, Subsistema./Montaje, component, lead of the design, were prepared close, date, revision (letter or number), and date of the revision. Modify these titles according to the needed thing.

3. Use the prepared diagram above to begin articles or functions of the listing. If the articles are component, enumérelos of a logical way underneath their subsistema/asamblea based on the block diagram.

4. Identify The Ways De Fallo. A failure way is defined as the way in which a component, a subsystem, a system, a process, a etc. could potentially not be able to solve the attempt of calculation.

The examples of the potential ways of failure include: or electrical hydrogen Corrosion or Fragility or Short or opened or to Fatigue Of the Effort of torsion or Deformation or cracking themselves

1. A way of failure in a component can serve as the cause as a way of failure in another component. Each lack is due to enumerate in technical terms. The failure ways are due to enumerate for the function of each passage of the component or the process. To this point the failure way must be identified if or the lack is not probable to happen. To watch similar products or processes and the lack that have been documented for them is a to begin with excellent point.

2. Describe the effects of those ways of failure. For each way of identified failure the engineer must determine itself which will be the last effect. An effect of the lack is defined as result a way of failure in the function of producto/proceso according to the perceived thing by the client. They must be described in terms of which it could see the client or experience if it happens the way of identified failure. Remember internal as well as the external client. The examples of the effects of the lack include: or Injury to the user or Inoperabilidad of the product or the process or incorrect Aspect of the product or the process or Scents or degraded Operation or Noise Establish a numerical graduation for the severity of the effect. A standard scale of the common industry uses 1 not to represent no effect and 10 to indicate very severe with the lack that affects the operation and the security of system without the warning. The attempt of the graduation is to help the analyst to determine if a lack would be an annoyance of smaller importance or a catastrophic occurrence to the client. This allows the engineer to give the priority to the lack and to treat true great editions first.

1. Identify the causes for each way of failure. A cause of the lack is defined as weakness of the design that can give rise to a lack. The potential causes for each way of failure must be identified and to be documented. The causes are due to enumerate in technical terms and not in terms of symptoms.

The potential examples of causes include:
or the incorrect effort of torsion was applied
or to incorrect Conditions of operation
or erroneous Contamination
or Algorithms
or incorrect Alignment
or excessive Shipment
or excessive Voltage

1. Incorporate the factor of the probability. A numerical weight is due to assign to each cause that it indicates how that cause is probably (probability of the cause that happens). A standard scale of the common industry uses 1 to represent not probably and 10 to indicate inevitable.

2. Identify the present controls (design or process). The present controls (design or process) are the mechanisms that they avoid that it happens the cause of the failure way or that they detected the lack before they reach to client. The engineer must now identify techniques of the test, the analysis, the supervision, and other that can or be used in such or productos/procesos similars to detect lack. Each one of these controls to determine how this, is hoped that it identifies or detects failure ways. After a new product or a process has been in the previously unnoticed use or the identified ways of failure cannot appear. The FMEA must then be updated and formulated plans to try those lack to eliminate them of producto/proceso.

3. Determine the probability of the detection. The detection is a burden of the probability that the present controls (design and process) will detect the cause of the way of failure or the way of failure itself, thus avoiding that reaches to the client. In agreement with the present controls, it considers the probability of the detection using the following table for the direction.

4, Risk Priority Numbers (RPN). The RPN is a mathematical product of the numerical degrees of severity, the probability and the detection. RPN = (Severity) x (Probability) x (Detection). The RPN is used to give to priority to articles the planning or the additional action of the quality.

5. Determine Recommended Actions (It determines Recommended Action(s)) to treat the potential lack that a high RPN has. These actions could include: Specific procedures of the inspection, the test or the quality; selection of diverse components or materials; reducing the normal capacity; limitation of environmental stresses or the rank of operation; readjustment of the article to avoid the failure way; supervision of mechanisms; execution of preventive maintenance; and inclusion of the systems or the redundancy of spare part.

6. Assign to the responsibility and a date of the completion in target for these actions. This makes responsabilidaad net and facilitates the pursuit.

7. Indicate the taken actions. After these actions have been taken, it again values severity, the probability and the detection and reviews the reviewed RPN. Any other action

8. is required more Ponga to the day the FMEA as the changes in the design or process, the changes of the burden or the new information

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