<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">OLGA RAHNEVA</style></author><author><style face="normal" font="default" size="100%">HRISTO KISKINOV</style></author><author><style face="normal" font="default" size="100%">ANNA MALINOVA</style></author><author><style face="normal" font="default" size="100%">GEORGI SPASOV</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A NOTE ON THE LEE–CHANG–PHAM–SONG SOFTWARE RELIABILITY MODEL</style></title><secondary-title><style face="normal" font="default" size="100%">Neural, Parallel, and Scientific Computations</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">41A46</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">11/2018</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://acadsol.eu/npsc/articles/26/3/6.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">26</style></volume><pages><style face="normal" font="default" size="100%">14</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;In this paper we study the Hausdorff approximation of the shifted Heaviside step function $h_{t_0}(t)$&amp;nbsp;by sigmoidal function based on the Lee--Chang--Pham--Song cumulative function and find an expression for the error of the best approximation.&amp;nbsp;We give real examples with small on--line data provided by IBM entry software package using the model.&amp;nbsp;The potentiality of the software reliability models is analyzed. Lee--Chang--Pham--Song's idea of including the characteristic $t^{\ast}$ (the time when debugging starts after modifying the code causing syntax errors) in the study of models in debugging theory can be successfully expanded.&amp;nbsp;For instance, for the Goel (1980) software reliability model.&lt;/p&gt;
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