Research on the Comprehensive Reliability Assessment Process for Products

2012 ◽  
Vol 628 ◽  
pp. 372-379
Author(s):  
Wen Jin Zhang ◽  
Nan Lan
Keyword(s):  
Life Cycle ◽  
Model Selection ◽  
Evaluation Model ◽  
Reliability Assessment ◽  
Assessment Process ◽  
Engineering Practice ◽  
Preliminary Screening ◽  
Reliability Design ◽  
Failure Data ◽  
Comprehensive Reliability

For problems, such as evaluation model selection is not appropriate and accuracy of the assessed value is low, exist in the reliability assessment of mechanical and electrical product, we propose a comprehensive reliability assessment process for mechanical and electrical products. In this paper, we discuss methods of reliability data collection and collation first. Then, criteria of preliminary screening for failure data are established. Furthermore, considering that life cycle of product is characterized by varied environment and varied population, it gives the method and steps for reliability assessment of produces. In addition, the process is used in the reliability assessment of products, and the calculation result illustrates that the process can be successfully applied to engineering practice. The process proposed in this paper provides a technical means for model selection in reliability assessment of mechanical and electrical product, and serves as the theoretical guidance for reliability validation and reliability design of product.

Model Selection Methods for Reliability Assessment Based on Interval-Censored Field Failure Samples

2020 ◽  
Vol 27 (06) ◽  
pp. 2050018
Author(s):  
Tzong-Ru Tsai ◽  
Sih-Hua Wu ◽  
Yan Shen
Keyword(s):  
Model Selection ◽  
High Speed ◽  
Reliability Assessment ◽  
Lifetime Distribution ◽  
Maximum Likelihood Estimates ◽  
Selection Procedures ◽  
Failure Data ◽  
Proposed Model ◽  
Interval Censored ◽  
Field Failure

Incomplete field failure data from automated production are often applied for evaluating the system reliability. But the evaluation could be impacted by the uncertainty of the product’s lifetime distribution, which is usually predetermined but may be misspecified. In this paper, we assume that the system lifetime distribution follows a location-scale family with several candidates instead of a certain distribution. Two model selection procedures are proposed to assign the most likely candidate distribution from a pool of the location-scale distributions based on interval-censored field failure samples. The maximum likelihood estimates (MLE) of parameters of the candidate distribution are estimated by using the Newton–Raphson method and the MLE of a quartile is assigned as the reliability measure for assessing the reliability of systems. To illustrate the applications of the proposed model selection procedures, an example of high-speed motor with interval-censored field failure data is given. Monte Carlo simulations are carried out to evaluate the performance of the proposed model selection procedures. Simulation results show that the proposed methods are efficient for model identification and can provide reliable reliability assessment.

Software Reliability Assessment Based on Fuzzy Evaluation

2012 ◽  
Vol 268-270 ◽  
pp. 1877-1881
Author(s):  
Li Xin Liu ◽  
Qiu Ying Li
Keyword(s):  
Life Cycle ◽  
Software Reliability ◽  
Late Phase ◽  
Reliability Assessment ◽  
Qualitative Evaluation ◽  
Assessment Method ◽  
Fuzzy Evaluation ◽  
Software Life Cycle ◽  
Failure Data ◽  
Software Assessment

Software reliability assessment plays an important role in the software reliability engineering, but the traditional software assessment method mostly focuses on evaluation by use of failure data which is gained only after testing or usage in the late phase of the software life cycle. Thus people hope to get every stage’s information about the software’s reliability which is taken as the reference or accordance to guide the software’s design, analysis and testing and so on. The correlative factors of various products, processes and resources in the whole software life cycle have a very important effect on software reliability and, uncertainty exists in the software reliability evaluation to some extent. Fuzzy evaluation has a strong applicability for solving the fuzzy problem and an approach for software reliability qualitative evaluation based on fuzzy evaluation was proposed in this paper. Firstly the rationale and process of this method were described in detail, then a case study was implemented. The experimental results showed that the approach was feasible and effective.

Fuzzy Comprehensive Evaluation of Human Performance Management

2013 ◽  
Vol 756-759 ◽  
pp. 715-719
Author(s):  
Huan Cheng Zhang ◽  
Ya Feng Yang ◽  
Feng Li ◽  
Li Nan Shi
Keyword(s):  
Performance Management ◽  
Evaluation System ◽  
Human Performance ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment Process ◽  
College Performance ◽  
Performance Evaluation System ◽  
Comprehensive Evaluation Model

In the College, performance evaluation system is directly related to the harmonious development of the school. Taking into account the factors in the evaluation system is fuzzy, so this paper uses fuzzy comprehensive evaluation model. But the model is too subjective, so this paper combines neural network and data envelopment analysis method, which ensures that fuzzy comprehensive evaluation model is reasonable and scientific, and good school development and teacher self-interest. The performance assessment process, not only enables the combination of qualitative and quantitative analysis, but also fair and reasonably reflect the achievements of teachers, while this method is easy to use, wide application, and can be well applied in practice.

Research of Graphic User Interface of Carbon Dioxide Emission Evaluation Model in Construction Life Cycle Based on Matlab

2013 ◽  
Vol 689 ◽  
pp. 546-550
Author(s):  
Xue Hong Gan ◽  
Wei Wang ◽  
Shi Mei Liu
Keyword(s):  
Carbon Dioxide ◽  
Life Cycle ◽  
Evaluation Model ◽  
Carbon Dioxide Emission ◽  
Graphic User Interface ◽  
Property Management ◽  
Low Carbon ◽  
Management Responsibility ◽  
Residential Quarter ◽  
First Time

To build carbon dioxide emission evaluation model in construction life cycle is the key link to make low-carbon research of theoretical studies head towards practical application. For the first time, residential quarter is selected as the object in the study, carbon dioxide emission management responsibility of owner and property being considered and carbon dioxide emission evaluation model in construction life cycle based on matlab as well as database of carbon dioxide factor being built initially. Net carbon dioxide emission information will be shown timely, then carbon dioxide emission and absorption can be adjusted by property management accordingly.

DOM Products: Activation Energy Estimation and Reliability Assessment

2013 ◽  
Vol 470 ◽  
pp. 781-784 ◽  
Author(s):  
Chien Yi Huang ◽  
Yueh Hsun Lin ◽  
Eric Huang
Keyword(s):  
Experimental Data ◽  
Activation Energy ◽  
Subjective Experience ◽  
Reliability Assessment ◽  
Life Time ◽  
Service Condition ◽  
Energy Estimation ◽  
Failure Data ◽  
Scientific Approach ◽  
Temperature Scenario

A scientific approach is proposed in this research to investigate a disk on module (DOM) product's activation energy based on experimental data that eliminates subjective experience. This study considers multiple temperature conditions to enhance the accuracy of activation energy estimation. In order to ensure the consistency of failure mode in each temperature scenario, the slopes of Weibul probability plots obtained from the failure data are calculated followed by an examination for parallelism. The estimated life time under normal service condition differs from the results obtained using the industrial standard given activation energy by approximately 42%.

Economic Evaluation of Remanufacturing End-of-Life Electromechanical Products

2012 ◽  
Vol 472-475 ◽  
pp. 2670-2673
Author(s):  
Zhao Long Xu ◽  
Su Mei Xiao ◽  
Yu Qiang Shi
Keyword(s):  
Life Cycle ◽  
Economic Evaluation ◽  
End Of Life ◽  
Product Life Cycle ◽  
Evaluation Model ◽  
Waste Products ◽  
Product Life ◽  
Electromechanical Products ◽  
Economic Evaluation Model

With the shortening of product life cycle, and the constant increasing of End-of-life Electromechanical Products, the processing of waste products appears especially important and urgent. This paper, based on an existing recycle model, has established an economic evaluation model of end-of-life electromechanical products. Based on the collection of a large amount of data and tests, the research and evaluation of the engine has proved it is suitability for remanufacturing.

Life-Cycle Reliability Assessment of Corroded Bridges under Multiple Hazards

2016 ◽  
pp. 420-426
Author(s):  
T. Yanweerasak ◽  
R. Takemoto ◽  
M. Akiyama ◽  
D.M. Frangopol
Keyword(s):  
Life Cycle ◽  
Reliability Assessment ◽  
Multiple Hazards
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