Reliability Analysis Based on Field Microdowntime Data: A Bottle Production Plant Case Study  
Author D Battini

 
Co-Author(s) A. Celin; A. Persona; F. Sgarbossa; I. Zennaro

 
Abstract Reliability analysis based on field downtime data is carried out in a bottle production plant. The main objective is to individuate the core inefficiency causes of the worst production line in terms of OEE; the analysis pointed out that the main cause is represented by "microdowntime", that are short production stops not directly related to mechanical/electric failure. A focused downtime analysis is carried out about the most critical machine of the pilot line; its microdowntime causes are individuated and measured on field in terms of TTF and TTR data. A statistical analysis is carried out on TTF of principal microdowntime to describe both the machine and the microdowntime reliability function with Weibull distribution. Moreover it is showed how each microdowntime influences the machine Reliability function, by recalculating it without the microdowntime influence. Finally it is individuated the recoverable OEE from each microdowntime (the most critical is 1,45% OEE).

 
Keywords Reliability analysis, OEE, Weibull Distribution, TTF, TTR, downtime
   
    Article #:  22343
 
Proceedings of the 22nd ISSAT International Conference on Reliability and Quality in Design
August 4-6, 2016 - Los Angeles, California, U.S.A.