The word usability also refers to methods for improving ease of use during the design process. In componentbased software development, it is necessary to measure the reusability of components in order to realize the reuse of components effectively. Nov 21, 2004 since then, usability research results have provided many hints to help software developers designing better gui. Measuring the usability of software components journal. International journal of humancomputer studies, 654, 306314. This article covers methodology, the different aspects of a portal, tools, and a case study. Generally, software measurement is considered as a management tool which if conducted in an effective manner, helps the project manager and the entire software team to take decisions that lead to successful completion of the project. The current trend on component development, addressing the lack of reuse in the software industry, has changed the daytoday tasks of software developers. Usability used to be a dominant concept but this changed with research increasingly focused on usage contexts. N2 in componentbased software development, it is necessary to measure the reusability of components in order to realize the reuse of components effectively. Towards a usablesecurity engineering framework for. It has become an industry standard with references in over 600 publications.
But the usability concepts have not to be limited to gui design. The word usability also refers to methods for improving easeofuse during the design process. Apr 16, 2020 list of the top computer stress test software. Usability metric for user experience interacting with. Componentbased software engineering cbse, also called componentsbased development cbd, is a branch of software engineering that emphasizes the separation of concerns with respect to the wideranging functionality available throughout a given software system. Reassessing the usability metric for user experience. A user experience designer can control accessibility, user interface, information architecture and usability to suit the uncontrolled aspects like goals, user lifestyle and habits. This paper presents a set of measures to assess the usability of software components, and describes the method followed to obtain and validate them.
The last decade marked the first real attempt to turn software development into engineering through the concepts of componentbased software development cbsd and commercial offtheshelf cots components, with the goal of creating highquality parts that could be joined together to form a functioning system. Usability thus became a key goal for the design of any interactive software that would not be used by trained technical computer specialists. Practical and reliable methods of measuring quality of use have been developed by the music project. International journal of the computer, the internet and management vol. In order to reap the potential benefits of telehealth technologies, the delivery system has to be usable for both patients and clinicians. A roadmap to identify complexity metrics for measuring. International journal of humancomputer studies, 642, 79102. For measuring the usability and efficiency of the cup system, they prepare a proposal to construct a new.
A metric is a system or standard of measurement represented in units that can be utilized to describe more than one attribute. Measuring usability with system usability scale sus. The conventional assumption that quality is an attribute of a product is misleading, as the attributes required for quality will depend on how the product is used. Best cpu, gpu, ram and pc stress test software in 2020. How easy is it for users to accomplish basic tasks the first time they encounter the design. Usability can be described as the capacity of a system to provide a condition for its users to perform the tasks safely, effectively, and efficiently while enjoying the experience. Those computational capabilities allow mobile phones to serve people in various areas including education, banking, commerce, travelling, and other daily life. User experience generally would be considered an aspect of usability. Measuring the usability and capability of app inv entor to. Sus is technology independent and has since been tested on hardware, consumer software, websites, cellphones, ivrs and even the yellowpages. Development of the telehealth usability questionnaire tuq. These measurable concepts and their related attributes are presented in table 1. Usability is a quality attribute that assesses how easy user interfaces are to use.
Software reliability electrical and computer engineering. Quality of use is therefore defined as the extent to which a product satisfies stated and implied needs when used under stated conditions. In this paper we thus present a set of measures to assess the usability of software components. Measuring usability as quality of use springerlink. A metrics suite for measuring reusability of software.
Usability metrics a guide to quantify the usability of. We define, in a consistent way, usability metrics for software components based. Measurement is commonplace in other engineering field, but not in software engineering. Evaluating software usability of geographic information system. Usability is a controlled aspect of user experience design that ensures the enduser doesnt strain or encounter problems with the use of a product or websites user interface. Measurement process is characterized by a set of five activities, which are listed below. The system usability scale sus was released into this world by john brooke in 1986. The system usability scale sus has gone on to become the mostly widely used questionnaire for evaluation perceptions of system usability. According to jakob nielsen 2003, usability is defined by 5 quality components. Threat can be defined as the probability of a particular attack at a given point of time. Quality of use can be used to measure usability as the extent to which specific goals can be. It often pertains to the field of software development.
Computer system usability questionnaire 19 questions. The standard scale has ten questions which measure the users overall impression of the usability of the software. Among other things, metrics can help managers track design progress and support decisions about when to release a product. This construct is a key to making systems easy to learn and easy to use.
Download pdf version 300kb usability is not a luxury. Jan 26, 2015 the system usability scale is an attempt to solve this problem. Let us now discuss on some major components of this system. In software engineering, usability is the degree to which a software can be used by specified consumers to achieve quantified objectives with effectiveness, efficiency, and satisfaction in a quantified context of use. The three components are related to one another and work together as one solution that enhances the process of integrating security and usability during software development.
In this paper, we present gis usability evaluating wellknown gis software named arcview gis to find out the severity ratings of problems. Measuring computer systems problems exist in other disciplines conclusions unsupported by data. Citeseerx measuring the usability of software components. Home browse by title periodicals journal of systems and software vol. As previously mentioned, from the three measurable concepts related to software component usability quality of the documentation, complexity of the solution and complexity of the problem we will just consider the first two. There are many reasons why you would measure usability. Metrics come in very handy when it comes to quantify usability during the usability evaluation of software, websites and applications. How shall i obtain the components needed to calculate it. Software functional quality is defined as conformance to explicitly stated functional requirements, identified for example using voice of the customer analysis part of the design for six sigma toolkit andor documented through use cases and the level of satisfaction experienced by endusers. Quality of use can be used to measure usability as the extent to which specific goals can be achieved with effectiveness, efficiency and satisfaction by specified users carrying out specified tasks in specified environments.
Measuring computer systems more problems comparing apples to oranges. Degree of master of computer science software engineering. If your website drives revenue, no matter how big or small, you have a vested interest in turning motivated users into buyers, and that requires understanding the needs and expectations of those users. The scales significantly correlated with the system usability scale sus and the computer system usability questionnaire csuq, indicating their concurrent validity. In general, the concept of usability can not be measured but it is related to several. T1 a metrics suite for measuring reusability of software components. Product metrics describe the characteristics of the product such as size, complexity, design features, performance, and quality level.
Reuse can reduce the time spent in creating solutions by avoiding duplicated efforts. For measuring integrity of software, attributes such as threat and security are used. Although measuring usability can cost four times as much as conducting qualitative studies which often generate better insight, metrics are sometimes worth the expense. Software reuse is the use of existing software components to construct new systems.
Most usability tests culminate with a short questionnaire that asks the participant to rate, usually on a 5 or 7point scale, various characteristics of the system. In human computer interaction and computer science, usability studies the elegance and clarity with which the interaction with a computer program or a web site web usability is designed. Jul 01, 2016 given the increase in pervasiveness of telehealth in the delivery of clinical services from a distance, along with the rise in use of computer based systems that rely on software and a computer interface as the model of delivering telehealth, the tuq will be valuable for measuring usability. They based their study on the isoiec 9126 30 model that defines usability in terms of five sub. Stress testing will check the behavior of a system, network, or application under an immense load. The system usability scale sus was introduced by british software engineer john brooke in 1986. Therefore, this paper aims to design a measurement tool to evaluate the usability of mobile applications based on the usability attributes and dimensions that must be considered in the interface. Usability is key when building a portal, because all of the components have to work together. Usability is the extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency, and satisfaction in a specified context of use. We define, in a consistent way, usability metrics for software components. Tullis and stetson 2004 found the sus to outperform the questionnaire for user interface satisfaction chin et al. Measuring the usability of software components citeseerx. We define, in a consistent way, usability metrics for software components based on the iso 9126 quality model.
Until now, we still have no good way of measuring software reliability. Before improving, a measure has to be taken so that the final product, when compared with the original, will clearly show the differences. Empowering humancomputer interaction in securing smartphone sensing. Pdf measuring the usability of software components. Abstract the tutorial explains the benefits of measuring usability as part of a usercentred design process, and. Before presenting the metrics, we will define the basic concepts on software measurement used in this paper, what we understand for usability in a cbsd framework, and the component information available to be measured. Usability metrics a guide to quantify the usability of any system. Measuring the usability of software components journal of. Measuring the usability of software components journal of systems. Concept of usability engineering goals of usability engineering. Furthermore, we describe the process followed to obtain and validate them. Though frustrating, the quest of quantifying software reliability has never ceased. The way in which these measurable concepts influence the usability of a component and its. Since then, usability research results have provided many hints to help software developers designing better gui.
Usability includes methods of measuring usability, such as needs analysis and the study of the principles behind an objects perceived efficiency or elegance. Ultimately, any effort to enhance the usability of a product or website will make a difference to the end user, the goal should be to make humanmade objects that are easy to use and learn. Usability is inherent to software quality because it expresses the relationship between the software and its application domain. Measuring the usability of software components sciencedirect. A metrics suite f or measuring reusability of software components hironori w ashizaki, hirokazu y amamoto and y oshiaki fukazaw a department of computer science, w aseda university. Pdf usability metrics for software components researchgate. What makes a good objective measure of an applications user experience. Measuring the usability of software components request pdf. Measuring emotional valence to understand the users experience of software. Reuse is the application of existing solutions to new problems. However, there is a lack of quality models and metrics that can help evaluate the quality characteristics of software components during this selection process.
Concept of usability engineering goals of usability. Comparing endtoend measurements with the sum of parts. Part of the lecture notes in computer science book series lncs, volume 4706. This report provides the basis for recommendations that will guide the development of an. The sus is a 10 item questionnaire with 5 response options. And the key to good usability for componentbased portals is a solid methodology grounded by the proper tools. The parallel analysis of principal components of umux pointed out a single latent variable, which was confirmed through a factor analysis, that showed the data fits better to a. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Pdf usability metrics for software components semantic scholar. The current understanding of usability is different from the early days in the 1980s.
Usability engineering is used to determine to what degree a product or prototype will be userfriendly. May 23, 2012 usability thus became a key goal for the design of any interactive software that would not be used by trained technical computer specialists. Software metrics is a standard of measure that contains many activities which involve some degree of measurement. Concept of usability engineering usability engineering is a method in the progress of software and systems, which includes user contribution from the inception of the process and assures the effectiveness of the product through the use of a usability requirement and metrics. You can also add more questions to your questionnaire, however, in my experience its best to use the sus scale because it is so popular and there are therefore industry benchmarks which you can measure against. Measuring usability with the system usability scale sus it is the 30th anniversary of the creation of the most used questionnaire for measuring perceptions of usability. Advances in intelligent systems and computing, vol 553.
Usability usually refers to software but is relevant to any product. Jan 03, 2012 usability is a quality attribute that assesses how easy user interfaces are to use. A metrics suite for measuring reusability of software components. Based on an analysis of 719 tasks performed using consumer and business software, jeff sauro concluded. It is a reusebased approach to defining, implementing and composing loosely coupled independent components into systems. In this paper, we thus present a set of measures to assess the usability of software components. Usability metrics a guide to quantify the usability of any. Pdf usability metrics for software components semantic. Ironically, conventional approaches to measuring usability frequently overlook user experience or only treat it superficially. Software integrity can be defined as the degree to which unauthorized access to the components of software program, data, and documents can be controlled. Measuring computer systems problems exist in other disciplines. Measuring usability with the system usability scale sus.