Application of Six Sigma Methodology in Software Development

Six Sigma is a problem solving methodology supported by set of techniques intended to improve business processes by reducing the probability of defect occurrence. The name Six Sigma is originated from the statistical term standard deviation (Greek letter sigma); this statistical term measures the variations in data. The first use of Six Sigma methodology targeted driving the processes toward six standard deviations between the mean and the nearest specification limit; this was the root for the name Six. This paper studies the application of Six Sigma methodology in software development since this methodology is proven in manufacturing as a method of eliminating defects in final products and reducing their variations.