In software engineering, a metric is a property of software that you can measure. By examining the theoretical bases on quality metrics, a base set of common quantitative metrics can be devised and mapped to quality metrics in which they reside. The practice of applying software metrics to operational factors and to maintain factors is a complex task. But avoid asking for help, clarification, or responding to other answers. We use your linkedin profile and activity data to personalize ads and to show you more relevant ads. Current implementation of quality metrics in the software development process is typically carried out within a control cycle.
The purpose of quality measurement and analysis ma is to develop and sustain a measurement capability used to support management information needs 1. Product metrics describe the characteristics of the product such as size, complexity, design features, performance, and quality level. The objective of measuring the software quality is to use the received results for planning the budget and schedule, estimating costs, testing and qa, debugging, etc. Samate software assurance metrics and tool evaluation. Within the software development process, there are many metrics that are all related to each. Introduction to samate has more details for us, software assurance sa covers both the property and the process to achieve it. Quality assurance qa online training quality assurance online training offer is intuitively designed with the guidance of software professionals who have hands on real time experience. Metrics on the use of metrics also highlights those metrics that may have a problem in use, are.
Software metric deals with the measurement of software product and software product development processand it guides and evaluates software development 3. The bugs framework bf precisely defines software weaknesses and organizes them into orthogonal classes, such as encryptiondecryption bugs enc, buffer overflow bof, injection inj, and control of interaction frequency cif. Define what quality means for large software systems 2. Software quality metrics dos and donts qaiquest 1 hour. Developing quality assurance program and quality metrics. Comprehensive in scope with extensive industry examples, it shows how to measure software quality and use measurements to. These are more closely associated with process and product metrics than with project metrics. Software quality involves the conformance of a software product to some predefined set of functional requirements at a specified level of quality. Quality of the software, different metrics look at different aspects of quality, but this aspect deals with the code. Software quality measurement and metrics 1 software bug.
The broadest tier of software testing metrics, companylevel measurements, offer executives a clear view as to how qa efforts are translating into the delivery of highquality software. Pdf software quality assurance, testing and metrics. A case study of a software firm in israel reveals weaknesses in the application of quality metrics. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. These characteristics can be used to improve the development and maintenance activities of the software. Quality assurance is a planned and systematic means for assuring management that the defined standards, practices, procedures, and methods of the process are applied. A case study thomas drake national security agency to ensure costeffective delivery of high quality software, nsa has analyzed effective quality measures applied to a sample code base of 25 million lines. No way to measure property directly or final product does not yet exist for predicting, need a model of relationship of predicted variable with other measurable variables. Now customize the name of a clipboard to store your clips. More importantly, they give insights into your teams test progress, productivity, and the quality of the system under test. Quality assurance is the process of defining how software quality can be achieved and how the development organization knows that the software has the required level of quality. Limitations to consider when using metrics to evaluate software systems. Ppt software quality management powerpoint presentation. Metrics and models in software quality engineering.
The main activity of the quality assurance process is the selection and definition of standards that are applied to the software development process or software product. Nov 24, 2016 in this post we will go through seven software quality performance indicators and analyze benefits they present the team and eventually how it could improve the overall quality of the product. Finding defects in code post release and prior to release, predicting defective code, predicting project success, and predicting project risk. Software quality metrics for testers starwest 20 slideshare. Metrics can be defined as standards of measurement. The project is to develop an application in java that uses molecular dynamics simulation techniques to simulate the interaction between the atoms in a group of water molecules. A metricsbased approach to technical documentation quality. Software quality metrics can be further divided into three categories. All employees should know how their work affect the metrics. The measurement of software design quality springerlink. Motivation why is qa measurement important quality assurance. Software quality metrics in quality assurance to study the.
The quality assurance program is ongoing and methodically examines the actual adequacy of the business services and products. The course starts with basics of software testing, methodically teaches you complicated topics such as software configuration management, creation of a test plan, estimating test etc. Quality assurance and measurement the mitre corporation. Cost of quality is one of the most important, yet often overlooked, metrics to monitor. Software metrics is a standard of measure that contains many activities which involve some degree of measurement.
Software testing and quality assurance software quality metrics 1. Sqa software quality assurance, software quality metrics, process metrics, product metrics introduction definition. Describes the characteristics of the product such as size, complexity, design features, performance, and quality level. Successful software quality assurance is highly dependent on software metrics.
Simply put, a software metric is a measure that allows getting a quantitative value of software features or specifications. Phasor measurement units pmus, phasor data concentrators. Ppt software quality measurement and metrics powerpoint. This 1992 report presents mechanisms for describing and specifying software problems and defectstwo software measures used to understand and predict software product quality and software process efficacy. Software testing and quality assurance software quality metrics ppt. The multiple professional views of product quality may be very different from popular or nonspecialist views.
There are a large number of quality factors against which software may be validated. The real concern is spi, and these issues are examined in our conclusions. However, quality measurement is not restricted to counting of defects or vulnerabilities but also covers other aspects of the qualities such as maintainability, reliability, integrity. Clipping is a handy way to collect important slides you want to go back to later. This metrics describe the project characteristics and execution.
The adobe flash plugin is needed to view this content. A measure of some property of a piece of software or its specifications. Modular design is the cornerstone of quality software, and metrics that can predict an optimum modular structure are critical. Recommendations for initial core measures cmusei92tr19 this report and the methods in it are outgrowths of work initiated by the quality subgroup of the software metrics definition working group. Justifiable confidence that software is free from vulnerabilities, either intentionally designed into the software or accidentally inserted at any time during its life cycle and that the software functions in the intended manner. This paper surveys existing metrics and suggests the. Asq, or the american society of quality, developed the following formula for cost of quality.
The software is considered valid when it conforms to these quality factors at some acceptable level. Download as ppt, pdf, txt or read online from scribd. Software quality metrics are a subset of software metrics that focus on the quality aspects of the product, process, and project. When implementing software quality metrics, we need to first understand the. Software quality assurance is the process of ensuring that the established guidelines, procedures and processes are followed. This is the single best book on software quality engineering and metrics that ive encountered.
Software testing metric is be defined as a quantitative measure that helps to estimate the progress, quality, and health of a software testing effort. Apr 26, 2010 from nasa software assurance standard nasastd8739. Software quality management sqm is a management process that aims to develop and manage the quality of software in such a way so as to best ensure that the product meets the quality standards expected by the customer while also meeting any necessary regulatory and developer requirements, if any. View the full whiteboard friday series on metrics that. Sep 16, 2017 a software metric is a measure of software characteristics which are quantifiable or countable. Important software test metrics and measurements explained with. Moreover, they have levels of abstraction beyond even the viewpoints of the developer or user.
Software quality metrics means measurement of attributes, pertaining to software quality along with its process of development. Software metrics massachusetts institute of technology. Tim boland tuesday may 29, 2012 software assurance metrics and tool evaluation samate is a broad and inclusive project at the. Software assurance metrics and tool evaluation samate. Software metrics are used to obtain objective reproducible measurements that can be useful for quality assurance, performance, debugging, management, and estimating costs. This paper discusses the development of traditional. Software metrics for different types of software defects. In depth look at dsqi and software package metrics. The ideal example to understand metrics would be a weekly mileage of. Thus the objectivity criterion was refined and subdivided into criteria as follows. Devise actions to improve quality of the software process improvements process performance improvements product productivity improvements product improvements 4. Breaking down the defects that software is measured for.
Via development of requirements using measurable targets, recording plans and processes, employees coaching and report on information related to requirements, the main quality assurance program will act as a process. The true cost of quality includes both the cost of poor quality and investments in good quality. A metric is a quantitative measure of the degree to which a system, system component, or process possesses a given attribute. Software quality managers require software to be tested before it is released to the market, and. Crosby, among many others, has defined software quality as. A free powerpoint ppt presentation displayed as a flash slide show on id. Software metrics are used to measure the quality of the project. Metrics on the use of metrics serve as one measure of your practice quality. Capers jones, from the forewordmetrics and models in software quality engineering, second edition, is the definitive book on this essential topic of software development. This case study dramatically illustrates the benefits of codelevel measurement activities. A framework for counting problems and defects william a. An in depth look at research that has been done on software metrics.
The nist samate software assurance metrics and tool evaluation project is dedicated to improving software assurance by developing methods to enable software tool evaluations, measuring the effectiveness of tools and techniques, and identifying gaps in tools and methods. Apr 29, 2020 software testing metric is be defined as a quantitative measure that helps to estimate the progress, quality, and health of a software testing effort. Management provides the plans to achieve the targets. May 16, 2016 in software engineering, a metric is a property of software that you can measure. Software quality metrics from theory to implementation. Simply, metric is a unit used for describing an attribute.
A framework for counting problems and defects september 1992 technical report william a. As explained above, test metrics are the most important to measure the quality of the software. Ppt software quality assurance powerpoint presentation. The measurement of software testing process attributes enables the management to have better insight in to the software testing process. A metric defines in quantitative terms the degree to which a system, system component, or process possesses a given attribute. This information is vital to recognizing how effective a companys overall software development and testing operation is, and which steps would need to be. Software quality measurement and metrics 1 free download as powerpoint presentation.
Software metrics and measurements semantic scholar. A case study thomas drake national security agency to ensure costeffective delivery of highquality software, nsa has analyzed effective quality measures applied to a sample code base of 25 million lines. Basically, as applied to the software product, a software metric measures or quantifies a characteristic of the software. Process metrics focus on the process of software development and measure process characteristics, aiming to detect problems or to push forward successful practices. Software metrics are important for many reasons, including measuring software performance, planning work items, measuring productivity, and many other uses. Oct 03, 2016 in this video we continue with our theme metrics that matter ryan yackel dives into quality metrics and the reports behind them.
In this video we continue with our theme metrics that matter ryan yackel dives into quality metrics and the reports behind them. Resource metrics are related to the resources required for software development and their performance. I would like to start the list with developer domain quality indicators and then move on to quality assurance qa domain metrics. Remove this presentation flag as inappropriate i dont like this i like this remember as a favorite. Software testing metrics are a way to measure and monitor your test activities. A quick overview of agile is given here although there are many agile process sites on the web that provide more indepth information. 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. A software metric is a standard of measure of a degree to which a software system or process possesses some property. Schedule variance project management tool none sokware tesrng e. Even if a metric is not a measurement metrics are functions, while measurements are the numbers obtained by the application of metrics, often the two terms are used as synonyms.
A measurement based software quality framework 419 approach. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. Some companies put the quality objectives within the quality assurance manual. The purpose of gathering measurements and metrics of software products and projects is to be able to relate one product or project to another for the purpose of sche.
A concept study for a national software engineering database cmusei92tr23 software measurement for dod systems. This document explains the software quality assurance plan sqap for mse project of lakshmikanth ganti. The metrics can together be used to answer operational questions regarding quality. Basic terminologies project indicators classification of software metrics. As part of your pqi program, you can record your metrics metric and work at improving it over time. Software quality metrics for testers why and what to measure. Florac with the quality subgroup of the software metrics definition working group and the software process measurement project team draft helvetica b 52 ul. Society for software quality ssq washington, dc area chapter software assurance metrics and tool evaluation samate overview by. We can accurately measure some property of software or process.
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