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To stay ahead in competition, software organizations have to deliver required functionality consistently guaranteed with high quality. The quality expectations of customers at purchase time from the software is the major reason of emergent attention of software organizations to implement quality management in software development. Nowadays, use of Component Based Software Development (CBSD) approach is considered success factor for business because of its underlying benefits like reusability, on-time delivery, high quality, and less cost. But success of CBSD depends upon the quality of components used. Many quality models have been proposed to provide high quality products, some of these are for general usage and others are for specific applications or domains. These specific purpose models are improved or modified forms of basic quality models especially ISO 9126. This paper presents key challenges or deterrents to the development of standard, complete and pervasive software quality models, solution to these challenges and their importance is also discussed.

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SAC-OCDMA systems are picking up prominence because of their property of low Multiple Access Interference (MAI). This paper deals with zero cross-correlation (ZCC) by considering permutation matrices (PM). The properties and performance analysis of PM-ZCC code are given in this study. The obtained results have shown that PM-ZCC code can achieve better BER for more number of users. In PM-ZCC code, the code length is neither too short nor too long which is the good property of encoder-decoder design structure.