Background: Accessible surface area (ASA) or solvent accessibility of amino acids in a protein has important implications. Knowledge of surface residues helps in locating potential candidates of active sites. Therefore, a method to quickly see the surface residues in a two dimensional model would help to immediately understand the population of amino acid residues on the surface and in the inner core of the proteins.

Software maintenance tools developed for attempted to raise the success rate of software systems over the past century. Improve software tools quality models and other software elements to make it more customer satisfaction and achieve customer permanence. Several quality models and variables have proposed to decrease software system failure and complexity. Also, software quality models proposed to assess the general and particular types of software products. These models have proposed to determine the general or particular scopes of software products-none of these quality models concerns the quality of software maintenance tools. The proposed software quality maintenance models developed based on the maintenance tools factor and the comparisons between the well-known quality models. These comparisons are the leakage of criteria based on distinct views and knowledge of maintenance tools requirement. The proposed technique applied to software maintenance tools. The outcome of the proposed technique demonstrates that the twelve factors must deem to increase the quality of software maintenance tools.

No abstract

No abstract