Among various srgms , the srgm of the type of the non - homogeneous poisson process ( nhpp ) is very important , which absorbs most researches and are applied widely . such a model generally assumes that the testing environment and the operating environment of software are same , namely , the failure data of software obtained in the testing environment can predict the reliability of software in the operating environment 非齊次泊松過程( non - homogeneouspoissonprocess ,簡(jiǎn)稱nhpp )類軟件可靠性增長(zhǎng)模型是軟件可靠性增長(zhǎng)模型中非常重要的一類,也是目前研究最多、應(yīng)用較廣的一類模型,這類模型一般假設(shè)軟件的測(cè)試環(huán)境與軟件的運(yùn)行環(huán)境相同,即用軟件在測(cè)試條件下獲得的失效數(shù)據(jù)能夠預(yù)測(cè)軟件在運(yùn)行時(shí)的可靠性。