Hello everyone, I am seeking advice and recommendations on improving MTBF and MTTR with SAP. As a newcomer to reliability, I come from a background in Mechanical Engineering with 10 years of experience in Condition Monitoring and Rotating Machinery. I am curious about whether MTBF should be calculated for a system, a machine, or a component. For instance, should the cooling water system be considered failed when it stops providing coolant, a rare occurrence with a 2x100% A pump? Should MTBF be assessed separately for the pump and motor, or even down to individual components like bearings, shafts, and impellers? I would appreciate hearing about your perspectives and best practices on this matter.
According to Reliability Centered Maintenance (RCM) principles, failures are defined by the inability to perform their intended function, rather than being solely component-based. Whether it's the pump, motor, controls, or power supply that is failing, if the system cannot operate as designed, it is deemed non-functional. It is crucial to prioritize system functionality over individual components, as a working pump with no way to power it provides no benefit to overall plant operations.
I concur, much appreciation
In interconnected industries, it is common practice to incorporate redundancy or standby components to ensure continuous operations in case of a failure. While the Mean Time Between Failures (MTBF) may be high or even perfect for the overall system as long as it is running smoothly, the MTBF for redundant components will be zero. It is advisable to measure both to assess the effectiveness of maintenance practices, ideally tracking at least 5 key performance indicators (KPIs). Ultimately, the important aspect to monitor is the trend in the indices to gauge the maintenance performance accurately. Thank you.
To improve data accuracy, it is important to first identify your objective and work backwards from there. Many businesses face challenges in gathering reliable failure data efficiently. Dependence on systems like SAP is not enough as the accuracy of the data input is crucial. Compiling inaccurate data can be counterproductive and result in poor decision-making. For more insights on data reliability, visit Erik at www.roadtoreliability.com.
Understanding the importance of a clear objective is crucial. Consider the level of equipment you plan to use for data collection and how you intend to utilize the information. In this scenario, it is likely best to focus on the Pump level, although the motor may also be involved depending on the specific failure and code used. If you are using MTBF to enhance your preventive maintenance strategies or eliminate failures, targeting this level is advisable.
Hello! When calculating MTBF (Mean Time Between Failures), you can actually do this at each of those levels: system, machine, and component. However, breaking it down to component level provides the most detailed picture and allows for focused improvement. You might consider the cooling water system failed when it's not performing its function. Based on the importance of each component, you can then prioritize which to measure. MTTR (Mean Time To Repair) is a different metric, and here component-level granularity might not always add the same value as with MTBF. Remember, higher granularity means more data to analyze and manage! Always balance granularity with manageability.
Hello, it's nice to see someone from a different background diving into MTBF and MTTR with SAP! To answer your question, the MTBF can be calculated for both a system as a whole and its individual components, depending on what you are specifically interested in. For your cooling water system example, you could consider the system 'failed' when it ceases its function of providing coolant. However, by breaking down the system into its constituent parts, like the pump and motor, bearings, shafts, and impellers, you get a more granular view of where potential issues lie and where preventive maintenance can be prioritized. Remember, MTBF provides a statistical indication and doesn't necessarily predict individual component or system failure accurately. Hence, understanding the context and variables at play is crucial. It's always intriguing to explore this domain and I'm glad to see you're on the journey. Happy to share more insights if needed!
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Answer: Answer: MTBF can be calculated for a system, a machine, or individual components depending on the level of analysis required. It is important to consider the criticality and impact of each component on the overall system reliability.
Answer: Answer: Failures can be defined based on specific criteria, such as when the cooling water system stops providing coolant. It is essential to establish clear failure definitions to accurately calculate MTBF.
Answer: Answer: It is recommended to assess MTBF separately for critical components to identify potential failure points and optimize maintenance strategies. This approach can help in improving overall system reliability and performance.
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