Reliability-Informed Life-Cycle Warranty Cost Analysis: A Case Study on a Transmission in Agricultural Equipment

2020 ◽  
Author(s):  
Meng Li ◽  
Jinqiang Liu ◽  
Venkat Pavan Nemani ◽  
Navaid Ahmed ◽  
Gül E. Kremer ◽  
...  
Keyword(s):  
Life Cycle ◽  
Real World ◽  
Time To Failure ◽  
Analysis Framework ◽  
Reliability Data ◽  
Agricultural Equipment ◽  
Warranty Cost ◽  
Warranty Policies ◽  
Field Reliability

Abstract In agricultural and industrial equipment, both new and remanufactured systems are often available for warranty coverage. In such cases, it may be challenging for equipment manufacturers to properly trade-off between the system reliability and the cost associated with a replacement option (e.g., replace with a new or remanufactured system). To address this problem, we present a reliability-informed life-cycle warranty cost (LCWC) analysis framework that enables equipment manufacturers to evaluate different warranty policies. These warranty policies differ in whether a new or remanufactured system is used for replacement in the case of product failure. The novelty of this LCWC analysis framework lies in its ability to incorporate real-world field reliability data into warranty policy assessment using probabilistic warranty cost models that consider multiple life cycles. First, the reliability functions for the new and remanufactured systems are built as the time-to-failure distributions that provide the best-fit to the field reliability data. Then, these reliability functions and their corresponding warranty policies are used to build the LCWC models according to the specific warranty terms. Finally, Monte Carlo simulation is used to propagate the time-to-failure uncertainty of each system, modeled by its reliability function, through each LCWC model to produce a probability distribution of the LCWC. The effectiveness of the proposed reliability-informed LCWC analysis framework is demonstrated with a real-world case study on a transmission used in some agricultural equipment.

Reliability-Informed Life-Cycle Warranty Cost Analysis: A Case Study on a Transmission in Agricultural Equipment

2021 ◽  
Author(s):  
Meng Li ◽  
Jinqiang Liu ◽  
Venkat Nemani ◽  
Navaid Ahmed ◽  
G\xfcl E. Kremer ◽  
...  
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Agricultural Equipment ◽  
Warranty Cost ◽  
Warranty Cost Analysis

scholarly journals RELIABILITY IMPROVEMENT METHODOLOGY FOR CONSUMER PRODUCTS - A CASE STUDY

2013 ◽  
pp. 88-92
Author(s):  
SHAIK HUSSAIN BASHA ◽  
SUDHANGSHU CHAKRAVORTY
Keyword(s):  
Consumer Products ◽  
Design Modification ◽  
Root Cause ◽  
Reliability Improvement ◽  
Failure Data ◽  
World Class ◽  
Warranty Cost ◽  
Field Reliability ◽  
Field Failure

The objective of every industry is to bring world-class quality products to the market in shortest possible time with least expenses. To meet this objective manufacturer’s always remains non compliant with Reliability requirement of the products due to which field failure rate increases and in turn increases the warranty cost. In this work, an attempt has been made to improve the field reliability for consumer product through a proposed step by step Reliability Improvement Methodology. The proposed methodology includes analysis of field failure data, failure analysis for identifying root cause, experimental investigation to confirm root causes, design modification recommendations and improvement validation through accelerated testing. Further, this analysis helps the manufacturers in warranty extension decision making for the existing products and in the improvement of the next generation product’s performance which directly increases the brand image and profits of an organization.

The Rise and Fall of an Open Source Project

2007 ◽  
pp. 259-276
Author(s):  
Graham Morrison
Keyword(s):  
Life Cycle ◽  
Statistical Analysis ◽  
Open Source ◽  
Real World ◽  
Anecdotal Evidence ◽  
Stages Of Development ◽  
Open Source Project ◽  
Development Life Cycle

The majority of open source projects fail. This chapter presents one such project as a case study, written from the perspective of the sole developer. It charts the various stages of development, from initial motivation and enthusiasm through the later stages of apathy and decline. It deals with many of the problems encountered by a sole developer, and the various approaches undertaken to maintain development momentum. This chapter provides anecdotal evidence as opposed to statistical analysis, giving an individual’s perspective on the development life cycle of an open source project, illustrating real world barriers to development and the typical issues that can stall a project.

scholarly journals A Life Cycle Sustainability Assessment-Based Decision-Analysis Framework

2018 ◽  
Vol 10 (11) ◽  
pp. 3863 ◽  
Author(s):  
Marwa Hannouf ◽  
Getachew Assefa
Keyword(s):  
Decision Making ◽  
Life Cycle ◽  
Decision Analysis ◽  
Sustainability Assessment ◽  
Three Dimensions ◽  
Life Cycle Sustainability Assessment ◽  
Analysis Framework ◽  
Product Systems ◽  
Trade Offs

One of the main challenges in using life cycle sustainability assessment (LCSA) is the difficulty of integrating the interrelationships between the three dimensions (environmental, economic and social dimensions) of LCSA results in decision-making toward proposing sustainability improvements for existing product systems. This paper is addressing this challenge by presenting an LCSA-based decision-analysis framework, which is a systematic and structured framework that appraises the pool of potential actions determined based on LCSA results and evaluates their trade-offs to propose potential sustainability solutions. The framework is composed of two parts: (a) LCSA application; (b) decision-analysis approach. The decision analysis part of the framework is built based on some features from previous decision-making approaches and considering the characteristics of LCSA results. The decision-analysis part of the framework, which is the main focus of this study, is divided into five phases to propose and select some recommendations to improve the sustainability performance of product systems. The framework developed is illustrated using results from a previous LCSA case study. The framework can handle the complexity in understanding the interrelationships between the three dimensions of LCSA results, through a structured way of dividing the process into manageable steps. Further work is still needed to apply this framework to a real case study.

scholarly journals Reliability-Informed Life Cycle Warranty Cost and Life Cycle Analysis of Newly Manufactured and Remanufactured Units

2021 ◽  
pp. 1-26
Author(s):  
Meng Li ◽  
Venkat P. Nemani ◽  
Jinqiang Liu ◽  
Michael A Lee ◽  
Navaid Ahmed ◽  
...  
Keyword(s):  
Decision Making ◽  
Life Cycle ◽  
Life Cycle Analysis ◽  
Life Cycles ◽  
Design Engineers ◽  
Rigorous Framework ◽  
Warranty Cost ◽  
The Difference ◽  
Standard Life ◽  
Warranty Policies

Abstract Standard life cycle techniques such as life cycle warranty cost (LCWC) analysis and life cycle analysis (LCA) are used to respectively quantify the relative economical and environmental advantages of remanufactured goods while simultaneously identifying avenues for improvement. In this paper, we contribute to the literature on life cycle studies by incorporating reliability into LCWC analysis and LCA with the goal of improving long-term/multiple life cycle decision making. We develop a branched power-law model to incorporate the physical degradation mechanisms leading to reduced reuse rates of system parts over multiple life cycles. We then follow a standard LCA protocol to quantify the difference between a new unit and its remanufactured version in terms of environmental impact items such as abiotic depletion potential, global warming potential, and energy consumption. We then devise four practical warranty policies that vary in the choice of replacement and/or provision for extended warranty. All possible replacement scenarios for multiple life cycles are explored for each policy and a mathematically rigorous framework is provided, where the reliability information is used to calculate probabilistic LCWC and life cycle impact items. This reliability-informed LCWC analysis and LCA framework enables design engineers to compare design options and warranty policies by quantifying both economical and environmental impacts to aid in decision making. Although the framework is presented in a general form applicable to any engineered system, we demonstrate the utility of this framework by using a case study of an infinitely variable transmission used in agricultural equipment.

scholarly journals A Case Study in Estimating Avionics Availability from Field Reliability Data

2015 ◽  
Vol 32 (4) ◽  
pp. 1553-1580 ◽  
Author(s):  
Ettore Settanni ◽  
Linda B. Newnes ◽  
Nils E. Thenent ◽  
Daniel Bumblauskas ◽  
Glenn Parry ◽  
...  
Keyword(s):  
Reliability Data ◽  
Field Reliability

Qualitative Case Study Research Design

2015 ◽  
Vol 25 (1) ◽  
pp. 39-45 ◽  
Author(s):  
Jennifer Tetnowski
Keyword(s):  
Research Design ◽  
Real World ◽  
Qualitative Case Study ◽  
Case Study Research ◽  
Study Research

Qualitative case study research can be a valuable tool for answering complex, real-world questions. This method is often misunderstood or neglected due to a lack of understanding by researchers and reviewers. This tutorial defines the characteristics of qualitative case study research and its application to a broader understanding of stuttering that cannot be defined through other methodologies. This article will describe ways that data can be collected and analyzed.

ASSESSMENT OF THE RELIABILITY OF VACUUM PRECISION PIEZOELECTRIC RESONATORS ACCORDING TO THE RESULTS OF THE ACCUMULATION AND COMPILATION OF THEIR LIFE CYCLE

2018 ◽  
pp. 65-71 ◽  
Author(s):  
I. V. Arkhipova
Keyword(s):  
Life Cycle ◽  
Reliability Theory ◽  
Time To Failure ◽  
Bayesian Theorem ◽  
Piezoelectric Resonators ◽  
Reliability Indicators ◽  
Performance Requirements ◽  
Methodical Basis ◽  
New Ideas ◽  
Generalization Of Data

Within the framework of this article the question of reliability evaluation of resonators with strict performance requirements for resistance to external factors is considered. Due to the increase in requirements for these products in terms of gamma-percentile time to failure and gamma-percentile storageability time, there is a need to develop new ideas and methods of reliability theory. As a methodical basis for generalization of data of their life cycle the approach on the basis of Bayesian theorem is offered. Based on the results of generalization of the statistics of resonator tests for various types of climatic influences and reliability tests, as well as the results of their use in the electronic equipment have been identified their main reliability indicators.

scholarly journals Life Cycle Costing: Understanding How It Is Practised and Its Relationship to Life Cycle Management—A Case Study

2020 ◽  
Vol 12 (8) ◽  
pp. 3252 ◽  
Author(s):  
Marianna Lena Kambanou
Keyword(s):  
Life Cycle ◽  
Life Cycle Management ◽  
Life Cycle Costing ◽  
Methodological Choices ◽  
Manufacturing Company

Despite the existence of many life cycle costing (LCC) methods, LCC is not widely adopted and LCC methods are usually further tailored by practitioners. Moreover, little is known about how practising LCC improves life cycle management (LCM) especially if LCM is considered emergent and constantly developing. In a manufacturing company, LCC is prescriptively introduced to improve LCM. In the first part, this study describes how various methodological choices and other aspects of practising LCC were the outcome of contestation and conformity with extant practices and not only the best way to fulfil the LCC’s objective. This contestation can even influence if LCC is adopted. In the second part of the research, the implications of practising LCC on LCM are explored. LCC is found to positively propel LCM in many ways e.g., by spreading the life cycle idea, but may lead to a narrower understanding of the term life cycle resulting in the sustainability focus of LCM being overridden. The article also discusses how the findings can be taken into consideration when researchers develop LCC methods and when industry practises LCC.

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