The science of reliability is a complex science and develops in

The science of reliability is a complex science and develops in
close interaction with other sciences, such as physics, chemistry,
mathematics, etc., which is especially evident when determining
reliability of systems of large scale and complexity.
When studying reliability issues, a wide variety of objects are considered - products, structures, systems with their subsystems. The reliability of the product depends on the reliability of its elements, and the higher their
reliability, the higher the reliability of the entire product.
Reliability - the property of an object to keep in time within the established limits the values ​​of all parameters characterizing the ability to perform the required functions in specified modes and conditions
application, maintenance, storage and transportation.
Insufficient reliability of the object leads to huge costs for its
repairs, downtime of machines, interruption in the supply of electricity, water, gas, vehicles to the population, failure to perform responsible tasks, sometimes to accidents associated with large economic losses, destruction of large facilities and human casualties. The lower the reliability of machines, the larger batches of them
to produce, which leads to excessive consumption of metal, an increase in production capacity, an overestimation of the cost of repairs and maintenance
The reliability of an object is a complex property, it is evaluated
according to four indicators - reliability, durability, maintainability and persistence, or a combination of these properties
Reliability is the property of an object to remain operational continuously for some time or some operating time. This is
property is especially important for machines whose failure is associated with
danger to people's lives. Reliability is inherent in an object in any of the possible modes of its existence, including during storage.
and transportation. Durability is the property of an object to maintain a working state until the limit state occurs with the established system of maintenance and repair.