Computer systems are more complex than other largescale engineered systems and that it is the software that makes them more complex. Even if a metric is not a measurement metrics are functions, while measurements are the numbers obtained by the application of. 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. Software metrics help project managers to gain an insight into the efficiency of the software process, project, and product. This ieee standards product is part of the family on software engineering. In the context of software engineering, software quality refers to two related but distinct notions. O termo qualidade possui diferentes definicoes na literatura. The simplest basis is loc, a count of the executable statements in a computer program. This repository contains a program analysis assignment to implement some basic software metrics.
The concepts of software metrics are well established, and many metrics relating to product quality have been developed and used. While metrics can be quite abstract and subjective, if you dedicate time to it and always try to improve them, it can give you useful information. With the manpower and time available, we focused on well known metrics applicable in the mdsf environment. It has been assigned as a part of iowa state universitys undergraduate software evolution and maintenance course. Moreover, it discusses the applicability of each metric in one of the iso 91263. In the last sections we also describe the key metrics used by several major software developers and discuss software metrics data collection. It is also used for decision making by decision maker.
The second goal of the satc model is the measurement of product code quality. Kan discusses several metrics in each of three groups of software quality metrics. The software metrics should be included in the intellectual production of the program, considering the system behavior measurements results obtained by users performance evaluation through out the favorable responses punctuation sum for the six in use metrics quality 27 subitems, 0 to 2 points each and for quality perception. Hd success metrics the level of success in responding to hd calls. This metrics describe the project characteristics and execution. A metric of software size as a tool for it governance arxiv. Why software metrics help software engineers to gain insight into the design and construction of the software. Provide a systematic way to assess quality based on a. Software metrics are used to record events taking place in the execution of a software program in order to obtain objective, reproducible and quantifiable measurements. Software metrics are important for many reasons, including measuring software performance, planning work items, measuring productivity, and many other uses.
This includes the software metrics used to evaluate objectoriented software. Describes the characteristics of the product such as size, complexity, design features, performance, and quality level. A software defect can be regarded as any failure to address enduser requirements. The adoption of the objectoriented paradigm is expected to help produce better and cheaper software. Basically, as applied to the software product, a software metric measures or quantifies a characteristic of the software. Quality management metrics for software development. Its presence can be difficult to define, but its absence easy to see within moments. Nonetheless, the project parameters such as the number of developers and their skill levels, the schedule, the size, and the organization structure certainly affect the quality of the product.
Mar 09, 2017 a software quality indicator is used to calculate and to provide an indication of the quality of the system by assessing system characteristics. For example, a direct final metric for the factor reliability could be faults per 1,000 lines of code kloc with a target valuesay, one fault per 1,000 lines of code loc. Sas data quality for midsize business assess, improve, monitor and manage the quality of all your data, structured and unstructured. Everyone knows that debugging is twice as hard as writing a program in the first place. Sep 20, 2017 for the love of physics walter lewin may 16, 2011 duration. Control, predict and take ownership of the changes in your software and the performance of your developers through customized and centralized information dashboards. An indicator usually compares a read more what are software quality indicators. Linda is a pastchair of the association for software. Estimate made of metric and then model predicts effort required. Thus, in the quest for improving software quality, its important to understand what it is and what metrics for software quality assurance to follow. Unless you do them well, metrics could prove to be. Audit planning and control software softexpert audit. Sep 16, 2017 a software metric is a measure of software characteristics which are quantifiable or countable. Patrick kua outlines four guidelines for an appropriate use of software metrics.
What is quality software quality metrics types of software quality metrics three groups of software quality metrics difference between errors, defects, faults, and failures lines of code function point feature point customer satisfaction metrics tools used for quality metricsmeasurements pert and cpm. Model developed using historical cost information that relates some software metric usually lines of code to project cost. Can anyone help me in working out formulas for these metrics. Here is a list of 7 key kpis necessary for effective project portfolio management. Number of function points nfp a measure of the development resources human resources required to develop a program, based on the functionality specified for the software system. The second step is to identify the software quality metrics by decomposing each factor into subfactors and those further into the metrics. This information is vital to recognizing how effective a companys overall software development and testing operation is, and which steps would need to be. A number of approaches have been taken to calculate, or at least estimate, the degree of complexity. Software quality measurement quantifies to what extent a software program or system rates along each of these five dimensions. Software metrics are a measure of some property of a piece of software or its specifications. With objectoriented analysis and design methodologies gaining popularity, it is time to start investigating objectoriented. 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. The software engineering community has proposed over two hundred software metrics. 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.
We can accurately measure some property of software or process. Now customize the name of a clipboard to store your clips. Isoiec 25000, 9126, 14598 software product quality. Pdf while software metrics typically help to assess the status of a project. For example, the resource utilization measure looks at the amount of time invested on one particular resource or set of resources. We certainly cannot claim completeness in this study. Software quality metrics overview product quality metrics informit. In general, software quality metrics are more closely associated with process and product metrics than with project metrics. Kloc classic metric that measures the size of software by thousands of code lines. In depth look at dsqi and software package metrics. A measure of some property of a piece of software or its specifications.
Quality is critical in the software development process. Design quality metrics for objectoriented software systems. Nonetheless, the project parameters such as the number of developers and their skill levels, the schedule, the size, and the organization structure certainly affect the quality of. Software quality metrics this part of the document defines standard metrics reported in literature. The software quality indicators address management concerns. In software engineering, a metric is a property of software that you can measure. Software quality metrics universiti tenaga nasional. Software metrics massachusetts institute of technology. How to start with software quality metrics xbosoft. Software testing metrics are a way to measure and monitor your test activities. The quality management metric qmm for a software development program manager is a composite score obtained using a questionnaire administered to both the program manager and a sample of his or.
Unless you do them well, metrics could prove to be more harm than good. Software system failures density metrics software system failures severity metrics failures of maintenance services metrics software system availability metrics. 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. Management metrics techniques for software cost estimation 1. Softexpert audit management software is designed to help companies to manage all the audit process. Examples include the number of software developers, the staffing pattern over the life cycle of the software, cost, schedule, and productivity. Within the software development process, there are many metrics that are all related to each. Software metrics is a standard of measure that contains many activities which involve some degree of measurement. He also describes the key metrics used by several major software developers and discusses software metrics data collection.
The main structural mechanisms of this paradigm, namely, inheritance, encapsulation, information hiding or polymorphism, are the keys to foster reuse and achieve easier. A software metric is a standard of measure of a degree to which a software system or process possesses some property. These measures provide an audit trail that have numerous valuable applications, including understanding the activity, quality assurance testing, software debugging, software. These characteristics can be used to improve the development and maintenance activities of the software. This is possible by collecting quality and productivity data and then analyzing and comparing these data with past averages in order to know whether quality improvements have occurred.
For the love of physics walter lewin may 16, 2011 duration. Whats important is that you consider counter metrics as you approa. How its weighted against speed, quality, accuracy, and joy differs from team to team, but every team cares about quality. Clipping is a handy way to collect important slides you want to go back to later. Often sets of software metrics are communicated to software development teams as goals. Through a single integrated platform, the solution manages all the steps, from audit planning, preparation, scheduling, development of audit plans and checklists, to execution, observations, reports and monitoring.
What is quality software quality metrics types of software quality metrics three groups of software quality metrics difference between errors, defects, faults, and failures lines of code function point feature point customer satisfaction metrics tools used for quality. Software quality metrics carnegie mellon school of. Doctoral program in information sciences and technologies. Software quality metrics for objectoriented environments. No brasil existe o programa brasileiro da qualidade e produtividade em. Engineering excellence asee and has chaired several conference program committees. Software quality metrics overview software metrics can be classified into three categories. The use of metrics is directly related to software process improvement.
Dec 23, 2014 software metrics are used to record events taking place in the execution of a software program in order to obtain objective, reproducible and quantifiable measurements. The result of the application of the goal question metric approach application is the. In general, software quality metrics are more closely associated with process and product metrics than with project met. Operational efficiency the operational efficiency kpi is utilized for measuring the team performance as well as resource utilization. More importantly, they give insights into your teams test progress, productivity, and the quality of the system under test.
Pdf aspect oriented software metrics based maintainability. Aspect oriented software development aosd, software. The metrics selected are applicable to the attributes that support this goal. Candidate metrics for objectoriented software within a taxonomy. Guide to the software engineering body of knowledge swebok. In this chapter from his book on software quality engineering, stephen h. Pdf use of software metrics in agile software development process. It includes a measure of the reliability of the code. The methodology spans the entire software life cycle.
What are software quality indicators learners window. Software measurement and software metrics in software quality. A few things to note about metrics in the software process though. Software quality metrics are a subset of software metrics that focus on the qual ity aspects of the product, process, and project.
Focus on specific attributes of software engineering work products resulting from analysis, design, coding, and testing. The technical question of how software metrics are collected, calculated and reported are not as important as deciding how to use software metrics. The main structural mechanisms of this paradigm, namely, inheritance, encapsulation, information hiding or polymorphism, are the keys to foster reuse and achieve easier maintainability. Sas indatabase technologies shorten the time needed to perform key data quality and analytic processes by carrying out these functions within the database.
1093 1116 1127 603 1345 200 1378 660 1533 1027 1587 1334 499 980 1227 1482 1053 1196 817 377 204 10 1009 1413 623 1095 424 310 811 468 739 804 234 669 1449 656 1539 1535 189 542 1070 785 1372 850 188 1408 1056 741 653