4 What are the reliability requirements Document the required reliability that

4 what are the reliability requirements document the

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functional failure. 4. What are the reliability requirements? Document the required reliability that the equipment or system must be designed to achieve. The essential elements of a reliability specification are: Quantitative statement of the reliability requirement Description of the environment in which the equipment/system will operate Time measure or mission profile 5. What is the life expectancy of the new equipment? Life expectancy is not only a critical design parameter, it also impacts the total-cost-of-ownership calculations. Therefore, a realistic evaluation is important to achieve the project needs and secure return on investment. ADVERTISEMENT 6. What are likely failure modes for the asset type? Review equipment history in the computerized maintenance management system (CMMS) for similar equipment in your facility or business. Look for dominant failure modes. Environmental conditions may intensify the mechanisms causing those failure modes, requiring additional service factors in the equipment specifications. If you get involved early enough, you can cost-effectively address high-risk failure modes with design changes. A design FMEA is the recommended tool for organizing failure data and ranking risk in the design phases. If the equipment is already purchased, those failure modes are typically mitigated with predictive and preventive maintenance. In this case, a reliability- centered maintenance FMEA is recommended. 7. Is the asset designed with maintainability in mind? If you get involved early enough, aim to adhere to these five principles: Standardized components. Standardization reduces the chances of using the wrong parts when corrective maintenance is performed, and results in fewer parts to deal with in inventory. It also reduces training and skill requirements, and often drives down design costs. Interchangeable parts. Different components can often be installed as replacement parts with no special customization required. This reduces maintenance and operational inventory, cost, and chance of using an incorrect part. Modular design. This design concept divides the installation into individual sections or units for quick replacement. This allows for easy isolation, removal and replacement of those modules with minimum downtime.
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Accessibility. Maintenance craft should be able to gain easy and safe access to parts that need maintenance. Software monitoring controls. When monitoring is done manually it can result in inconsistency, omission, or error. Software controls allow for continuous monitoring and thereby timely and accurate completion of tasks that ensure asset reliability.
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  • Summer '16
  • julio villa

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