2.3 How is SPI Determined?


2.3 How is SPI Determined?

SPI is determined by measuring the performance of a new and improved process using tools such as statistical process control. First, the attributes or characteristics of an old software process are measured and analyzed to determine its performance. Then, the attributes or characteristics of a new software process are measured and analyzed to determine its performance. Classes of attributes or characteristics include effort, cost, and cycle time. Productivity, quality, reliability, precision, predictability, efficiency, simplicity, and customer satisfaction are also key attributes. Significant characteristics include degree of automation, consistency, repeatability , measurability, variety, and innovation.

Effort is a measure of how many hours a process requires. Cost is a measure of how much money a process requires. Cycle time is a measure of how long a process takes. Productivity is a measure of how many units a process yields. Quality is a measure of how many defects a process yields. Reliability is a measure of the frequency of failures encountered . Precision is a measure of exactness and conciseness. Predictability is a measure of statistical accuracy. Efficiency is a measure of resources consumed relative to process output. Simplicity is a measure of process complexity. Customer satisfaction is a measure of how well clients are served . Degree of automation is a measure of eliminating the causes of human variation. Consistency is a measure of minimal performance variation. Repeatability is also a measure of minimum performance variation. Measurability is a quantitative and often tangible or physical characteristic of a process or product. Variety is a measure of process flexibility to satisfy multiple diverse customer requirements. Innovation is a measure of the range and creativity of products and services.




ROI of Software Process Improvement. Metrics for Project Managers and Software Engineers
ROI of Software Process Improvement: Metrics for Project Managers and Software Engineers
ISBN: 193215924X
EAN: 2147483647
Year: 2004
Pages: 145

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