MTTF Versus MTBF
ثبت نشده
چکیده
MTBF (mean time between failures) is the expected time between two successive failures of a system. Therefore, MTBF is a key reliability metric for systems that can be repaired or restored. MTTF (mean time to failure) is the expected time to failure of a system. Non-repairable systems can fail only once. Therefore, for a non-repairable system, MTTF is equivalent to the mean of its failure time distribution. Repairable systems can fail several times. In general, it takes more time for the first failure to occur than it does for subsequent failures to occur. Therefore, MTTF for a repairable system can represent one of two things: (1) the mean time to first failure (MTTFF) or (2) the mean uptime (MUT) within a failure-repair cycle in a long run.
منابع مشابه
Reliability Analysis of K-out-of-n: G Redundant System in the Presence of Lethal & Non-lethal Common Cause Shock Failures and with Imperfect Fault Coverage
This paper deals with the Reliability analysis of K-out-of-n : G redundant system in the presence of Lethal & Non-lethal Common Cause Shock failures (CCS) along with imperfect fault coverage. S.Akhtar (1994) has discussed the reliability analysis of k-out-of-n: G redundant system with Perfect and imperfect fault coverage and derived Reliability measures namely Rs (t), As (t), MTTF, MTBF. K.Mall...
متن کاملThe Importance of Preventive Maintenance in terms of Reliability in Aviation Sector
Aircraft is a system that requires high reliability levels throughout flights. Preventive maintenance procedures are applied to maintain this reliability at an optimum level. The higher frequency of preventive maintenance applications means higher reliability level; however, very frequent application of preventive maintenance is not economical though. In order to obtain optimum benefit, this ma...
متن کاملDegradation Analysis of Probabilistic Parallel Choice Systems
Degradation analysis is used to analyze the useful lifetimes of systems, their failure rates, and various other system parameters like mean time to failure (MTTF), mean time between failures (MTBF), and the system failure rate (SFR). In many systems, certain possible parallel paths of execution that have greater chances of success are preferred over others. Thus we introduce here the concept of...
متن کاملOptimisation of software reliability prediction
The reliability of software is one of the most important software metrics. In the course of time, systems have become more and more complex and that is why software has become more complex, too. It is an undeniable fact that this will lead to an increasing number of software faults. Models of software reliability are used to track down software faults. The aim is to make sure that an improvemen...
متن کاملReliability Metrics in Component Based Methods for a Distributed System
The distributed system is a paradigm in which the components can communicate by means of the interface connected between them. The interaction between the components takes place in order to achieve a common goal. The reliability metrics is used to evaluate the performance of the components which is connected by the distributed systems. The Mean Time Between Failure (MTBF), Mean Time to Repair (...
متن کامل