Question

What is the measure for product reliability .

Answer 1

At present, most of the goods and services are obtained and sent to their recipients through a "productive systems", often of great dimension both by the number of people who work in them and by the size and value Of the facilities and equipment they use. Throughout its life cycle each system goes through different phases. The first is the construction and start-up, until the normal operating regime is reached. During this second phase, called operation, which is the only truly productive mind, the system is subjected to failures that hinder or even temporarily or definitively interrupt its operation. The object of maintenance is, precisely, to reduce the negative incidence of such failures, either by reducing their number or mitigating its consequences. We say that something fails when it stops giving us the service that should give us or when there are undesirable effects, according to the design specifications with which the good in question was built or installed. In general, everything that exists, especially if it is mobile, deteriorates, breaks or fails over time. It can be short term or very long term. The mere passage of time causes in some goods, evident diminutions of their characteristics, qualities or benefits. The study of the failures of products, equipment and systems is what reliability is about. In a colloquial sense, we say that someone or something is reliable if we can trust him or her. We associate reliability with the ability to rely reliably on something or someone. Man-made systems are designed to meet a particular need. To do this they must function in a specific way in a certain environment. Sooner or later, all systems come to an instant where they can not satisfactorily fulfill what they were designed for. .The failure of the system will have repercussions that will depend on the type of system, and the type of mission that is performing and the moment in which the failure occurs as well as its magnitude. It is desirable that the designed systems be reliable, in the sense that the user can operate them without there being a high risk of failure. The level of reliability, or safety of satisfactory operation, will depend on the nature of the purpose of the system. The fact that a system has a certain reliability will carry a cost and an associated effort, reason why the exigency of reliability for a system must be adapted to its objective and transcendence. Reliability is clearly an essential factor in the safety of a product. To achieve the objectives of adequate functional performance, life cycle cost limitation, and safety, the design phase is the moment when a significant influence can be achieved on them. Therefore, most of the reliability studies and methods developed focus on product design. Reliability engineering is the study of longevity and failure of equipment. Scientific and mathematical principles are applied to investigate the causes by which devices age and fail. The aim is that a greater understanding of device failures will help in identifying improvements that can be introduced in product designs to increase their life or at least to limit the adverse consequences of failures