Estimation of Automobile Components Reliability Using Warranty Repair Data Comprising Early Failures

2019 ◽  
Vol 19 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Young Il Kwon
Keyword(s):  
Early Failures ◽  
Automobile Components

FABRICATION OF POLYMER MASTER FOR ANTIREFLECTIVE SURFACE USING HOT EMBOSSING AND AAO PROCESS

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5887-5894 ◽  
Author(s):  
HONG GUE SHIN ◽  
JONG TAE KWON ◽  
YOUNG HO SEO ◽  
BYEONG HEE KIM
Keyword(s):  
Aspect Ratio ◽  
Silicon Layer ◽  
Processing Parameters ◽  
Hot Embossing ◽  
Large Area ◽  
Anodized Aluminum ◽  
Simple Method ◽  
Anodized Aluminum Oxide ◽  
Coating Method ◽  
Automobile Components

A simple method for the fabrication of polymer master for antireflective surface is presented. In conventional fabrication methods for antireflective surface, coating method with low refractive index have usually been used. However, it is required to have a high cost and a long processing time for mass production. In this paper, antireflective surface was fabricated by using hot embossing process with porous anodized aluminum oxide. Through multi-AAO and etching processes, nano patterned master with high aspect ratio was fabricated at the large area. Size and aspect ratio of nano patterned master are about 175 ± 25 nm and 2 ~ 3, respectively. In order to replicate nano patterned master, hot embossing process was performed by varying the processing parameters such as temperature, pressure and embossing time etc. Finally, antireflective surface can be successfully obtained after etching process to remove selectively silicon layer of AAO master. Optical and rheological characteristics of antireflective surface were analyzed by using SEM, EDX and spectrometer inspection. Antireflective structure by replicating hot embossing process can be applied to various displays and automobile components.

Simulating IC reliability with emphasis on process-flaw related early failures

1995 ◽  
Vol 44 (4) ◽  
pp. 556-561 ◽  
Author(s):  
M.S. Moosa ◽  
K.F. Poole
Keyword(s):  
Early Failures

The impact of early failures on maintenance costs: an empirical study in Latin America

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rodrigo E. Peimbert-García ◽  
Jesús Isaac Vázquez-Serrano ◽  
Jorge Limón-Robles
Keyword(s):  
Empirical Study ◽  
Economic Impact ◽  
Goodness Of Fit ◽  
Electric Utility ◽  
Opportunity Costs ◽  
Current Transformers ◽  
Maintenance Costs ◽  
Content Type ◽  
Early Failures ◽  
The Impact

PurposeLiterature shows that the economics of early failures in maintenance and electric utilities have not been deeply analyzed. This study aims to focus on quantifying the economic impact that early failures in current transformers have on total maintenance costs. The empirical study is conducted in a regional transmission division of an electric utility located in Mexico.Design/methodology/approachThe utility's database was accessed to collect 219 maintenance records. Clustering techniques were used to identify early failures from a bimodal distribution of failures. Confirmatory goodness-of-fit procedures followed the analysis, and finally, direct and opportunity costs were estimated by adapting the cost-of-quality (PAF) Model.FindingsAround 11% of all maintenance activities are triggered by early failures, and they account for up to US$2.2m during the eight-year period under study, which represents 16% of total maintenance costs. Additionally, opportunity costs represent close to two-thirds of the total costs due to early failures. This was obtained after finding and validating a clear-cut border of 3.5 months between early failures and the rest.Originality/valueFailures in energy grids and power transmission can have a large economic impact on the power industry and the society in general. Thus, the maintenance function in equipment such as current transformers is a crucial entry of the budget of any electric utility. This study is one of the very few that highlights the magnitude and importance of direct and opportunity costs derived from early failures.

scholarly journals Automobile components: Lithium and cobalt. Evidence of persistence

Energy ◽  
2019 ◽  
Vol 169 ◽  
pp. 489-495 ◽  
Author(s):  
Manuel Monge ◽  
Luis A. Gil-Alana
Keyword(s):  
Automobile Components
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