1 votes 1 votes The following table shows the time between failures for a software system. Error Number 1 2 3 4 5 Time since last failure(hours) 6 4 8 5 6 The reliability of the system for one hour of operation assuming an exponential model is : 0.45 0.63 0.84 0.95 IS&Software Engineering gateit-2007 is&software-engineering software-reliability normal out-of-syllabus-now + – Ishrat Jahan asked Oct 30, 2014 retagged Nov 13, 2017 by Arjun Ishrat Jahan 2.0k views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 1 votes 1 votes MTBF is the mean (average) of a distribution of product life time or life between successive failures. MTBF=(6+4+8+5+6)/5=29/5 the probability or reliability that the product will work for a defined period of time without failure is given by the following equation: R(T)=exp(-T/MTBF) here T= 1hour R(1)=e^(-5/29)=e^(-0.1724)=0.84 Reference: http://www.profaceamerica.com/sites/default/files/cms/cms/resource_library/files/6fef09c498f66461/mtbf_communique.pdf https://en.wikipedia.org/wiki/Mean_time_between_failures Deepthi_ts answered Mar 26, 2017 selected Apr 6, 2017 by Sanjay Sharma Deepthi_ts comment Share Follow See 1 comment See all 1 1 comment reply Yashaswini Vanaja commented Dec 3, 2017 reply Follow Share if T is 1 then calculation should be e^(-1/29) 0 votes 0 votes Please log in or register to add a comment.