Preliminary communication

https://doi.org/10.17559/TV-20181105130950

Forecasting of Warranty Returns Based on the Reliability of Delivery Assessment

Teresa Gajewska* ; Cracow University of Technology, Faculty of Mechanical Engineering, Al. Jana Pawla II 37, 31-864 Krakow, Poland
Grzegorz Kaczor ; Cracow University of Technology, Faculty of Mechanical Engineering, Al. Jana Pawla II 37, 31-864 Krakow, Poland
Maciej Szkoda ; Cracow University of Technology, Faculty of Mechanical Engineering, Al. Jana Pawla II 37, 31-864 Krakow, Poland

Abstract

The paper presents a method to evaluate the reliability of deliveries with the application of Reliasoft Weibull++ software. The first stage in the proposed method was to collect data on outbound deliveries on a monthly basis and convert them into reliability data (life data). Next, by combining selected statistical tests and the maximum likelihood estimation method, the most accurate model of reliability of deliveries was obtained. Using the model which was generated, selected reliability indices were determined, such as: reliability of deliveries, unreliability of deliveries, failure rate of deliveries. Consequently, the number of future failed deliveries was forecast, taking into account the confidence bounds. The approach presented may be easily applied in companies in the logistics sector. The authors underlined that the reliability of deliveries is one of the key factors determining business competitiveness.

Keywords

Nevada Chart; reliability of deliveries; warranty analysis; Weibull distribution

Hrčak ID:

258232

URI

https://hrcak.srce.hr/258232

Publication date:

6.6.2021.

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