Software testing free ebook download as powerpoint presentation. Quality control process is a subset that falls under the quality assurance. Following factors are used to measure software development quality. The task of actual testing is performed to find out and identify the bugs present in the product. The classic model of software quality factors, suggested by mccall, consists of 11 factors mccall et al. We can view quality of a software product as having three dimensions. Software testing and quality assurance software quality assurance software testing and quality assurance software quality assurance. Simply put, a software metric is a measure that allows getting a quantitative value of software features or specifications. Failure to meet any of these areas would imply that your product does not have the right level of quality as defined by you and the company and therefore, it is not ready to be launched to market. This article defines the characteristics identified by iso 91261. It encompasses overall structure, processes, systems, reliability and performance factors. Testability requirements deal with the testing of the software system as well as. Ease with which the software and data can be checked for compliance with standards. Learning slot is your global destination for your software testing, join us and get trained on software testing with certification and introduce yourself to the world of software.
In software projects, it is most important to measure the quality, cost, and effectiveness of the project and the processes. Software quality factors ppt video online download slideplayer. Definition of software quality what is software quality. Apr 12, 2020 risk based testing rbt is a testing type done based on the probability of risk.
For software products, the fitness of use is generally explained in terms of satisfaction of the requirements laid down in the srs document. Software testing software testing quality assurance. Introduction it is the process used to identify the correctness,completeness and quality of developed computersoftware. For ease of testing, such as providing predefined intermediate results and log files. The automation software can also enter test data into the system under test, compare expected and actual results and generate detailed test. Without measuring these, a project cant be completed successfully. Sqa spans across the entire software development lifecycle that includes requirements management, software design, coding, testing, and release management. Software quality metrics are a subset of software metrics that focus on the quality aspects of the product, process, and project. A software quality factor is a nonfunctional requirement for a software program which is not called up by the customers contract, but nevertheless is a desirable requirement which enhances the quality of the software program. The characteristics are manifested externally when the software is used as a consequence of internal software attributes. Developing methods that can produce high quality software is another fundamental goal of software engineering.
The main goal of quality models is to achieve quality more quality factors with cost and performance as prime consideration. The quality model presented in the first part of the standard, isoiec 91261, classifies software quality in a structured set of characteristics and subcharacteristics as follows. A document describing the scope, approach, resources and schedule of intended test activities. Ppt software testing tools powerpoint presentation free. Quality quality of the software is checked to see if it meets the requirements, expectations and demands of the customer and free from defects. The isoiec 9126 standard describes a software quality model which categorizes software quality into six characteristics factors which are subdivided into subcharacteristics criteria. This model is designed on the basis of the relationship that exist between software properties and its quality. Testability requirements for the ease of testing are related to special features in the programs that help the tester, for instance by providing. When trying to improve quality, we must understand what it is. A test plan is a document describing software testing scope and activities.
Typically a critical factor in avoiding combinatoric issues. It helps to find out defects if any, and also to point out the factors that caused such defects. Factors in software quality for knowledge based systems r t plant the paper consider. In todays article, we will learn with examples and graphs software test metrics and measurements and how to use these in the software testing. May 31, 2016 different software quality models are developed and in that only two of the models are considered in the present time for a remarkable quality attributes of the software. The functions are those that satisfy stated or implied needs. Software quality factors the various factors, which influence the software, are. The objective of software testing is not only to ensure the quality of the product application but also to identify and fix usability gaps in the product. Ppt software testing and quality assurance powerpoint. Software quality assurance is the property of its rightful owner. But you cant ignore the parts if your goal is to produce images of the highest quality. Source code should be tested with the most coverage and with the most efficient testing. To be able to deliver high quality software while considering human factors, software testing has been converging with programming for some years now. Practices that support the production of quality software software testing techniques lifecycle models for requirements, defects, test cases, and test results process models for units, integration, system, and acceptance testing how to build test teams, including recruiting and retaining test.
Presented by saptarshi dutta chowdhurymca, heritage institute of technology 2. A free powerpoint ppt presentation displayed as a flash slide show on id. 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. Every software is a bit different and developers have to do slightly different things to ensure quality. Test methodologies include functional and nonfunctional testing to validate the aut. The correct definition of software quality assurance is. Several models of software quality factors and their categorization have been suggested over the years. These defined standards could be one or a combination of any like iso 9000, cmmi model, iso15504, etc.
Testability requirements for the ease of testing are related to special features in the programs that help the tester. The biggest factor is the experience and expertise of the developers working on the software. What are the factors in which software quality depends. For example, modularity is an attribute of the architecture of a software system. Software quality assurance sqa consists of the means to ensure the quality of the released software by monitoring the software engineering methods and processes. How to measure software quality is one of the most heated debates in the world of software development. Software metrics can be classified into three categories.
These factors pertain to the testing and maintainability of software. It involves execution of a software component or system component to evaluate one or more properties of interest. Ideally, the software quality assurance plan must contain elements demonstrating the competence of persons depending on the roles that they assume, but this management may be formalized at the companys level. Jun 23, 2016 quality control, alternatively, is product oriented. Quality management system software for pharma amplelogic amplelogic quality management system qms is a webbased quality management software that provides an end to end solution to the organizations that enables to automate or eliminate paperbased the processes and integrating them across a single platform.
Often used interchangeably, the three terms refer to slightly different aspects of software quality management. The function of software quality that assures that the standards, processes, and procedures are. Software quality assurancesqa software quality assurance is the set of activities which ensure that the standards, processes and procedures are suitable for the project and implemented correctly. Functionality a set of attributes that bear on the existence of a set of functions and their specified properties. Dromeys quality model this model emphasises on evaluating one software s quality with another. Ppt software quality assurance powerpoint presentation. The paper defines quality in terms ola manrlwtur ing process and then relates the creation qlso. Quality assurance, quality control and testing altexsoft. After fixes, the product is verified again such that the functionalities and. Similarly, models consisting of 12 to 15 factors, were suggested by deutsch and willis 1988 and by evans and marciniak 1987. Software development process software development process spiral software development cycle contd.
Software testing or quality assurance strategies describe how to mitigate product risks of stakeholders at the test level, which kinds of testing are to be done and which entry and exit criteria will apply. When we talk about software quality, we are actually talking about the evaluation of the software based on certain attributes. Software reliability is also an important factor affecting system reliability. Qc detects bugs by inspecting and testing the product. Although strongqa is still rather young, it has already earned the reputation of a company that provides reliable, high quality and effective support in different testing spheres, including but not limited to functional testing, ui testing, security testing and automated testing.
Integrated product development system software quality assurance element i software development standards why are standards important. Aug 28, 2019 quality assurance is a process to eliminate defects in the endtoend product cycle. A software defect can be regarded as any failure to address enduser requirements. The models general utility is divided into various factors portability. Software testing is defined as an activity to check whether the actual results match the expected results and to ensure that the software system is defect free. It is the basis for formally testing any software product in a project.
Software testing and quality assurance white box testing. Quality software is reasonably bug or defect free, delivered on time and within budget, meets requirements andor expectations, and is maintainable. Testability effort required to test the programs for their functionality. On the contrary, manual testing is performed by a human sitting in front of a computer carefully executing the test steps. Iso 84021986 standard defines quality as the totality of features and characteristics of a product or service that bears its ability to satisfy stated or implied needs. Software quality assurance plan is an outline of quality measures to ensure quality levels within a software development effort the plan provides the framework and guidelines for development of understandable and maintainable code. Nov, 2017 what is software quality assurance and how it is beneficial a complete video based urdu hindi presentation. Strongqa was founded in 2009 by a group of professionals specialized in qa and software testing. Write different software quality factors computer notes. Describes the characteristics of the product such as size, complexity, design features, performance, and quality level process metrics. Theory and practice equips readers with a solid understanding of. Software testing methodology is defined as strategies and testing types used to certify that the application under test meets client expectations.
These are more closely associated with process and product metrics than with project metrics. Testability requirements deal with the testing of an information system. The qai global institutes quality engineered software and testing conference quest is a week of classes, tutorials, educational sessions, handson workshops, discussion groups, and networking events for it professionals from around the world. Comparison of software quality models is done to verify whether which model. Jan 12, 2017 software testing or quality assurance strategies describe how to mitigate product risks of stakeholders at the test level, which kinds of testing are to be done and which entry and exit criteria will apply. Many say that software quality simply cant be measured in any meaningful and accurate way. Automation testing means using an automation tool to execute your test case suite. It identifies amongst others test items, the features to be tested, the testing tasks. I could start by describing quality assurance processes in preindustrial societies, long before anyone had ever heard of software.
Presentation gives brief idea about software testing and its tools. Examples of testing methodologies are unit testing, integration testing, system testing, performance testing etc. Software quality models software quality model is a representation of the characteristics of the software that describe its quality. This model tests a quality model by evaluating the results of the metrics. Learn what quality in software engineering is here. We need to know various quality factors upon which quality of a software produced is. Let us take an example, our creator created the software named human. Image quality is one of those concepts thats greater than the sum of its parts. To measure the quality of your product, you need to answer these questions first.
A quality criteria is an attribute of a quality factor that is related to software development. Impact of human factors on software quality and testing. That is, a quality product does precisely what the users want it to do. It is the function of software quality that determines the ending result is what was expected. A software quality is defined based on the study of external and internal features of the software. The identification of the quality factor which enables the ability of adaption of the software in the new environment is known as product transition. There are many factors that influence this decision, including development, build and testing. Factors in software quality for knowledge based systems. Software quality attributes play a drastic role in software testing industry. Software quality assurance sqa is a process which assures that all software engineering processes, methods, activities and work items are monitored and comply against the defined standards. It differs from hardware reliability in that it reflects the design.
Quality control ensure that procedures and standards are followed by the software development team. These characteristics can be used to improve the development and maintenance activities of the software project metrics. Quality management should be separate from project management to ensure independence. Write different software quality factors ecomputernotes.
Software testing quality assurance strategies tatvasoft. At the same time, functional aspect can be assured through a set of dedicated quality management activities, which includes quality assurance, quality control, and testing. This article will give you a list of software quality attributes in quality assurance and quality control. Software quality assurance an overview sciencedirect topics. Critical success factors in software projects software projects are still late, over budget, and. The level of software quality attainable is a reflection of an organizational business decision. Software reliability is the probability of failurefree software operation for a specified period of time in a specified environment. Ppt quality management powerpoint presentation free to. Software quality is defined as a field of study and practice that describes the desirable attributes of software products.
It is intended to specify the required software product quality for software development and software evaluation. Mccall 1977 boehm 1978 common objectives of a software quality model are as followsdue to revolution, there are other software quality models that are developed in the. Learned and novice software quality specialists alike debate which factors are most important to software quality. This presentation highlights key factors we consider when creating qa strategies. Software quality product is defined in term of its fitness of purpose.
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. This page introduces the key image quality factors and briefly describes how imatest measures. We use your linkedin profile and activity data to personalize ads and to show you more relevant ads. It involves assessing the risk, based on the complexity, business criticality, usage frequency, visible areas, defect prone areas, etc. Jeanlouis boulanger, in certifiable software applications 2, 2017. Introduction to software testing and quality assurance.
Here factors are related to the operational performance, convenience, ease of usage and correctness. Scribd is the worlds largest social reading and publishing site. Department of electrical and computer engineering university of waterloo, waterloo. The bugs are raised to the developers, who then try to fix them. Iso91261 represents the latest and ongoing research into characterizing software for the purposes of software quality control, software quality assurance and software process improvement spi. Jul 12, 2016 keep reading for a brief and totally nonexhaustive history of quality assurance and software testing. Software quality metrics can be further divided into three categories.