## Proceedings of the International School of Physics "Enrico Fermi". |

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Page 290

Software systems go through two principal

development

implemented ...

Software systems go through two principal

**phases**during their life-cycle:development

**phase**and operation and maintenance**phase**. The development**phase**begins when the need for the product is identified; it ends when theimplemented ...

Page 291

During the implementation or coding

» language. A high-level, « structured » language might be used to improve

readability and manageability of the software [9]. The purpose of the testing

During the implementation or coding

**phase**, each module is coded in a « suitable» language. A high-level, « structured » language might be used to improve

readability and manageability of the software [9]. The purpose of the testing

**phase**...Page 297

Following [4], we classify the reliability models according to the

software life-cycle. Thus reliability models are classified according to whether

they are used during the development (debugging)

the ...

Following [4], we classify the reliability models according to the

**phases**ofsoftware life-cycle. Thus reliability models are classified according to whether

they are used during the development (debugging)

**phase**, the validation**phase**,the ...

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### Contents

System Eeliabujty | 3 |

Statistical Theory of Eeliablitt | 8 |

Definitions and characterizations | 12 |

Copyright | |

39 other sections not shown

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### Common terms and phrases

algorithm approach associated assume assumption Bayesian boundary points chain coherent system complex conjugate prior consider correctness defined denote detected discussed edited equations equivalence class ergodic errors example exponential distribution failure rate Fault Tree Analysis function gamma given human reliability IEEE Trans IFEA implementation increasing independent input domain integration interval likelihood Markov Markov chain matrix mean method modules monotone month2 N. D. Singpurwalla number of failures number of system NUMITEMS observed obtained operational output parameters phase Poisson Poisson process possible predictive prior distribution probability problem procedure Proschan R. E. Barlow random variables reliability growth models reliability theory renewal theory repair requirements sample sect sequence Software Eng software reliability software reliability models specification Stat statistical stochastic stochastic process subsection system failure system reliability techniques theorem tion tt tt values vector zero