Product reliability and warranty period as a cost-forming factors

Abstract

The relevance of this study is determined by the fact that, in modern conditions, the manufacturers of high-tech products offer long-term warranty service for their products aiming at receiving the consumer. In turn, the frequency of warranty service depends on the probability of trouble-free operation of the product in a certain time interval. However, increasing the uptime of the products and increase the warranty period results in increased costs. Therefore, the purpose of this study is to develop a model that allows determining the impact of the following factors on the product cost: the reliability of the manufactured products and the term of their warranty. To achieve the goal of the research there has been determined the content of warranty service, has been introduced the integrated indicator of quality warranty services, and has been shown the level of products reliability as a dependence from the costs of their manufacturing and warranty service. The novelty of this study is estimation of the manufacturer's cost depending on the way of providing the warranty service, either by repair, or by complete replacement of the failed product. The research results provide competitive advantages to manufacturers of high-tech products since it enables to find the efficient period and intensity of the warranty service.

Partial replacement of cement with rice husk ash in concrete production: an exploratory cost-benefit analysis for low-income communities

“…As part of the global sustainability agenda to reduce carbon footprint and stay as environmentally friendly as possible, cement and sand replacement materials in concrete exist in various forms, such as blast furnace slag, which is a by-product of iron manufacturing used as a substitute for cement (Pal et al, 2003;Divsholi et al, 2014;Salvador et al, 2019;Ozbay et al, 2016;Mo et al, 2015). Fly ash, a fine powder, which is a by-product of burning pulverised coal in electric generation power plants, has been used to partially replace cement and sand in concrete (Christy & Tensing, 2010;Dhaka & Roy, 2015;Muhit et al, 2013;Jatio et al, 2019;Rajamane et al, 2007;Rafieizonooz et al, 2016;Reshma et al, 2021;Rajagopalan, 2019;Podolyakina, 2016;Białas, 2016). Copper tailings have also been used to partially replace sand and cement in concrete to reduce the depletion of natural resources (Muleya et al, 2020;Dandautiya & Singh, 2019;Kundu et al, 2016;Swetha et al, 2015).…”