Maintainability can be defined as the ease with which a software product can be. In this paper, software metrics related to complexity are developed and evaluated. A software metric is a measure of software characteristics which are quantifiable or countable. What software quality really is and the metrics you can. Even if a metric is not a measurement metrics are functions, while. Based on the passed or failed rates of all the tests executed by the software testers, the quality ratio, is used as both a software testing metrics as well as a kpi. It caused delays and rework, along with a lot of frustration. Metrics and models in software quality engineering goes even further, discussing such topics as inprocess metrics, defect removal effectiveness, customer satisfaction, and more. In the context of software engineering, software quality refers to two related but distinct notions. Capers jones, from the forewordmetrics and models in software quality engineering, second edition, is the. These characteristics can be used to improve the development and maintenance activities of the software project metrics.
We will also present a few more quality metrics devised in more modern, agile software development environments. Software metrics massachusetts institute of technology. He is certified by the american society for quality as a quality. Quality metrics are pretty easy to discern, anything that relates to the quality of the product coming out of engineering or the quality of information going in. Programmer productivity metrics because software intangible, not possible to measure directly. Efficient measuring and testing of your software for quality is the only way to maximize the chances of releasing high quality software in todays fastpaced development environments. Sizeoriented metrics are used to analyze the quality of software with the help of a kloc quantifier. The software metrics that the quality assurance qa team procedures are connected with the test activities that are part of test phase and so are formally known as s oftware testing. Metrics and models in software quality engineering, 2nd. Software metrics are valuable for many reasons, including measuring software.
Kloc is an abbreviation for kilo lines of code that are used to determine bugs, errors, and costs per lines. Endproduct quality metrics inprocess quality metrics the essence of software quality engineering is. Kan has been a faculty member of the master of science in software engineering program at the university of minnesota since 1998. Software metrics are proposed to help show indications for quality, size, complexity, etc. A key to quality in software testing generate and track meaningful quality measurements with testrail. Metrics with bad values are indications that some remedial action should probably be taken. Software quality metrics can be divided further into endproduct quality metrics and inprocess quality metrics. Software engineering software quality geeksforgeeks. Describes the characteristics of the product such as size, complexity, design features, performance, and quality level process metrics. Metrics and models in software quality engineering, second. This is possible by collecting quality and productivity data and then analyzing and. Metrics and models in software quality engineering, second edition, is the definitive book on this essential topic of software development.
Top 10 software development metrics to measure productivity. Measuring your quality assurance efforts helps you improve your software quality framework, understand your product quality more deeply, and create a more efficient software testing process. Below are some examples of test metrics and methods for measuring the important aspects of software quality. Software testing metric is be defined as a quantitative measure that helps to estimate the progress, quality, and health of a software testing effort.
Agile metrics are a crucial part of an agile software development process. The essence of software quality engineering is to investigate the relationships among in. A software metric is a standard of measure of a degree to which a software system or process possesses some property. Software measurement is a titrate impute of a characteristic of a software product or the software process. The subset of metrics that focus on quality software quality metrics can be divided into. The effort required to find and measure relevant business metrics for features is outweighed by the insights and learning opportunities gained. Kan is senior technical staff member stsm and a technical manager in programming for ibm in rochester, minnesota. Software metrics is a standard of measure that contains many activities which involve some degree of measurement. This is the single best book on software quality engineering and metrics that ive encountered. View the full whiteboard friday series on metrics that. Strengthen your quality metrics with quality engineering.
Metrics and models in software quality engineering guide. They help software teams monitor productivity across workflow stages, access software quality, as well as. Examples of metrics programs software quality metrics. Software measurement and software metrics in software quality. Software metrics help project managers to gain an insight into the efficiency of the software process, project, and product.
Comprehensive in scope with extensive industry examples, it. We have seen how subjective software metrics matter far more for business success than the traditional, objective quality metrics of old. Metrics and models in software quality engineering. Testrail qa metrics quality assurance metrics testrail. Software metrics are important for many reasons, including measuring software performance, planning work items, measuring productivity, and many other uses within the software development process, there are many metrics that are all related to each other. In this chapter from his book on software quality engineering, stephen h. This course is designed to help improve your job performance and the quality of your. A software metric is a measure of software characteristics which are measurable or countable. The essence of software quality engineering is to investigate the relationships among inprocess metrics, project characteristics, and endproduct quality, and, based on the findings, to engineer improvements in both process and. That is, a highquality product will specifically what the users need it to try to. Here are the top five quality metrics that really matter. Quality engineering efforts are needed to not only test the software quality, but also to analyze and enhance quality throughout the application development lifecycle.
Metrics can be defined as quantitative measures that allow software engineers to identify the efficiency and improve the quality of software process, project, and product. The goal behind using precise metrics and measurement in software engineering is to identify and control what can affect software development and the project as a whole. In software engineering, software maintenance is one of the most expensive and timeconsuming activities. This course is for software quality specialists and engineers wishing to obtain an understanding of software quality. Remember, no matter what your operation is you are shooting for 100% first time success. Kan discusses several metrics in each of three groups of software quality metrics. If poor quality software produced quickly, may appear to be more productive than if produce reliable and easy.
In this video we continue with our theme metrics that matter ryan yackel dives into quality metrics and the reports behind them. This book describes the software quality engineering metrics and models. Software functional quality reflects how well it complies with or conforms to a given design, based on. Product metrics describe the characteristics of the product such as size, complexity, design features, performance, and quality level. Software metrics can be classified into three categories. Well provide brief guidelines on how you can actually measure each aspect of the. Remember the last time someone committed to do something for you and either failed to deliver or didnt meet your standards. Traditionally, a highquality product is outlined in terms of its fitness of purpose. Top 5 software metrics to manage development projects. As process manager of the quality management process in product. For the love of physics walter lewin may 16, 2011 duration.