Reliability probability of success, Computer Networking

Reliability is the probability of success; where success is defined as compliance to specified requirements. A system or an item is considered reliable if it performs satisfactorily. Thus, reliability is an important attribute for estimating continuous operation of a system.

The main benefits by building reliable systems are time & cost. Usually, wherever a failure occurs, faulty part can always be replaced by a new part or it can be repaired. However, the materials manpower and the system down time are critical factors, which ultimately result in increased cost. The time required for repair translates into non-operational delays and for commercial organizations, this also means poor reputation; which in turn also affects growth of the organization. Thus, lack of reliability or poor reliability leads to a failure, which in turn results in user inconvenience, and financial loss.

Reliability  of  a  system (or  a  product)  is  important.Manufacturers  of consumer items claim reliability of their products in different terminology. e.g. a refrigeration company providing  guarantee  for  'X' years, but lighting manufacturers claim 'Y' hours of operation or a TV manufacturing company offers 'Z' years of warranty. When a manufacturer provides a guarantee / warranty for a definite duration, it is ensured and demonstrated by exhaustive testing carried out to establish trouble free operation.

Other terms related to reliability are "availability" and "survivability". Availability and maintainability apply to repairable systems only. Availability is a measure  of  degree  to  which  the  system can  perform the  required  function. Availability is defined as a function of operating time and down time. (Down time includes repair time). Maintainability is a measure of to what extent a system can be retained in the desired condition and level of performance after repairs.

For an Earth station of Aircraft, the degree of maintainability plays an important  role  in  its  long  term  availability.  For  non-repairable  systems  like Satellite Launch Vehicle, missile, missile launcher etc., the measure of reliability is survivability. That means the system is required to perform, under specified operating conditions for a specified duration of time without failure.Hence it is notable that reliability is a quantitative (probabilistic) factor, which can be predicted in design, measurable in tests, assurable in production (and maintainable in field for repairable systems).

 

Posted Date: 9/7/2012 7:19:34 AM | Location : United States







Related Discussions:- Reliability probability of success, Assignment Help, Ask Question on Reliability probability of success, Get Answer, Expert's Help, Reliability probability of success Discussions

Write discussion on Reliability probability of success
Your posts are moderated
Related Questions
Q. Explain about Twisted-Pair Cable? - Two conductors surrounded by insulating material - One wire utilize to carry signals and other used as a ground reference - Twistin

Q. Show the CRC-Performance ? CRC-Performance CRC is able to detect all burst errors that affect an odd number of bits CRC is able to detect all burst errors of

Source to Destination Data Transfer - Datagram approach - Each packet is treated independently. - Every pkt will take its own path to reach the destination. - There i

The project idea is : Analyze Snort or PCAP data from a public WIFI hotspot (describe traffice seen and what it is, protocols, ports, etc). This is what is expected. Initially r

In case of any new event switch do broadcast, after that always do Unicast.

In HTML, a tag shows the browser what to do. When you write an HTML page, you enter tags for lot of  reasons -- to change the appearance of text, to show a graphic, or to make a co

Define the terms Unicasting, Multiccasting and Broadcasting? If the message is sent from a source to a one destination node, it is called Unicasting. If the message is sent

Explain the importance of authentication. Authentication is the method of verifying a user's credentials before he can log into the network. It is normally performed using a us

Hub A hub  is a  small box that  connects  individual devices on network  so that  these devices  can  communicate  with each  other. Hub  is an inexpensive device. It is comm

Q. Illustrate the Model for Network Security? - A message is transferred from one party (Principal) to another. - A logical information channel is founded between the t