Reliability Analysis System Improvement Measures
Reliability is concerned with “the probability of performing specific functions when systems, devices, and parts are working under the defined operational condition during intended period.” It is not necessarily achieved although systems, devices, and parts enjoy their high performance.
Reliability Analysis System Service SET provides is a methodology to support technical decision making process by predicting the probability of failure in advance through the status analysis and the reliability prediction based on failure data using the Weibull tool.
| Improving Reliability and Quality Problem-Solving Process |
| Phenomenological analysis… Using Weibull ‘Warranty and Cost Forecast’ |
| Warranty forecast |
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Weibull Chart: Analysis of the number of failures per unit time (per month) during the product's service life |
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º Field Failure Data Analysis on the basis of production date
º Time Series Evaluation
º Recommend to arrange Product vs. Failure Mode data
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| Failure Mode Analysis per unit time (per month) during the product's service life |
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º Failure Distribution Analysis based on Weibull Chart - Decreasing phase: Early Failure (Quality Failure) - Constant phase: Catastrophic Failure - Increasing phase: Wear-out Failure
º Selection of countermeasures for improvement based on Failure Distribution - Decreasing phase: Focus on Quality Improvement (Eliminate Repair and Retrofit) - Constant phase: Focus on System Reliability Improvement - Increasing phase: Focus on life expectancy Improvement
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| Prediction of Reliability and Warranty Expenses |
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Reliability Prediction: Reliability Analysis per unit time (per month) during the product's service life |
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º Reliability (survival rate) Analysis using product's service time data
º Establish improvement measures based on Reliability Analysis results
º Recommend to arrange Product vs. Failure Mode data
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Cost Analysis |
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º Warranty Cost Predictions on each product
º Prioritize improvement items based on cost
º Provide as effectiveness measure for improvements
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| Input and output of reliability analysis |
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