Define and improve software quality with test methodologies

Software development needs from every industry becomes essential with increasingly growing expectations everyday. In order to response these demands form each different industry, suitable software development life cycle model shoud be selected at the begining of project thus this model must be appropriate for practicing requirements. Necessity of testing a software product may be ignored during milestones of projects due to limited time and budget. İgnoring essential testing process decreases quality of software where failures are detected by end user expriences. Software failures detected by end users with their own expriences causes financial loss, even loss of life according to industry of project such as safety critical systems. Scope of this project focuses on importance of testing process within software development life cycle models , methodologies of testing which determines overall quality of software and observation of increasing quality of software after testing. For examination of sotware development life cylce from testing point of view, software from health sector is selected then its redeveloped . In this thesis a software is developed which measures growth of liver after a liver transplant surgery by means of its volume. There isn't any automated or predeveloped software testing tool is used. This thesis is also a kind of high quality software which may satisfy needs of health sector. Although some observations are made for health sector's software, it's clearly certain that,software from other industries which have poor software qualty are vulnerable and risky. As a conclusion, testing of a software with correct methodologie minimizes risks of software product is covered in this thesis.