Kan discusses several metrics in each of three groups of software quality metrics. Performance metrics are collected at the entry point to each server in the system. Part 4 of this book part 4 of this book looks into 2 key issues from metrology that are often. Moreover, we should view quality from the entire software lifecycle perspective and, in this regard, we should include metrics that measure the quality level of the maintenance process as another category of software quality metrics. It describes the metrics programs of several large software companies and discusses software engineering data collection. Software quality model an overview sciencedirect topics. Chapter 11 assuring the quality of software maintenance components 254 11. A report on the analysis of metrics and measures on software quality factors a literature study 1vanitha n, 2thirumalaiselvi r 1department of computer science, womens christian college. Because our goal is to understand the programming process and to learn to engineer quality into the process, inprocess quality metrics play an important role.
The physical andor intellectual skill required to learn the system 2. Part of the problem lies with the process, rather than individual developers. Customer acquisition cost is the amount of money it takes to create a conversion. Hd calls severity metrics the severity of the hd issues raised. The book is also supported by an instructors guide. Product metrics describe the characteristics of the product such selection from metrics and models in software quality engineering, second edition book. A report on the analysis of metrics and measures on. Additionally, we perform both a theoretical, and an.
Hd calls density metrics measured by the number of calls. Data is collected periodically and forwarded to a central point for analysis, decision making, and historical storage. In this chapter we elaborate on the transfer and adaptation of quality metrics from. Software quality metrics can be further divided into three categories. The multiple professional views of product quality may be very different from popular or nonspecialist views.
Metrics for sw quality 4 suggested quality measures usability an attempt to measure userfriendliness can be measured in terms of 4 characteristics. Compendium of software quality standards and metrics. Quality in software, interaction, and value contains a collection of writings from various experts in the field of usability and user interface development. Assume that we are to set the defect rate goal for releasetorelease improvement of one product. On the basis of these challenges, and current research trends in aggregation of software metrics, we. Cisco prime network analysis module user guide overview. The defect rate metrics measure code quality per unit. Software quality metrics can be divided further into endproduct quality metrics and inprocess quality metrics. This book introduces software quality assurance sqa and provides an overview of standards used to implement sqa.
Preproject software quality components 41 chapter 5. Chapter 4, software quality metrics overview, presents examples of quality metrics for the three categories of metrics associated with the software lifecycle. Size is the critical factor in determining cost, schedule, and effort. It defines ways to assess the effectiveness of how one approaches software quality across key industry sectors such as telecommunications, transport, defense, and aerospace. On the basis of these challenges, and current research trends in aggregation of software metrics, we distill requirements for software quality models. Software quality metrics are a subset of software metrics that focus on the quality aspects of the product, process, and project. Software engineers use product metrics to help them assess the quality of the design and construction the software product being built. Overview of impact of requirement metrics in software.
This course is designed to help improve your job performance and the quality of your companys software products. In the past, various software quality models and metrics have been proposed and developed by different authors to measure the software quality. A software quality model is a defined set of characteristics, and of relationships between them, which provides a framework for specifying quality requirements and evaluating quality isoiec 25000. The second step is to identify the software quality metrics by decomposing each factor into subfactors and those further into the metrics. Software quality metrics overview software metrics can be classified into three categories. It is a broad course that addresses all of the body of knowledge area of the csqe.
Software quality metrics overview product quality metrics. Performance metrics give an overview of where time is spent in the system and enable comparisons of wait times across the system. On average, this will more than double a websites desired quality metrics yielding an improvement score of 2. The satc applies a model for evaluating software quality that has four. In this chapter we discuss several metrics in each of three groups of software quality metrics. Each chapter includes a reallife mini case study, examples, a summary, selected.
Chapter 23 product metrics for software overview this chapter describes the use of product metrics in the software quality assurance process. Sqa components in the project life cycle 72 chapter 7. Applying ieee software engineering standards and the cmmcmmi processes and procedures together can help users. In the activitybased approach, quality models are constructed based on. This chapter discusses software process metrics that are classified into four.
They can be grouped into three categories in accordance with the software life cycle. Jan 03, 2012 on average, this will more than double a websites desired quality metrics yielding an improvement score of 2. Basics of software quality engineering benefits of software quality benefits of software quality. In software project management, we are primarily concerned with productivity and quality metrics. Software quality metrics are associated with process and product metrics than. Good practice in software quality engineering, however, also needs. The implementation details are provided in section 4. Inprocess quality metrics are less formally defined than endproduct metrics, and their practices vary greatly among software developers. Prime nam software provides network operations and engineering with user, command line, and application programming interfaces that you use for traffic analysis of applications, hosts, and. In this chapter from his book on software quality engineering, stephen h. Shewhart overview financial selection from design for trustworthy software.
Metrics and models in software quality engineering second. In this chapter an expansion and consolidation of the traditional software quality assurance sqa, software quality control sqc and software process improvement spi roles is proposed, in order to leverage a companys internal regulatory compliance resources for sqa, sqc, and spi activities, and vice versa. The quality plan defines the most important quality attributes for the software and includes a definition of the quality assessment process. Measuring whether the product meets customer expectations provides a high level of. The time required to become moderately efficient in the use of the system. It describes the metrics programs of several large software companies and discusses collection of software engineering data.
Software metrics overviewsoftware metrics provide a quantitative vehicle for evaluating and managing quality factors and risks related to a given software product. Software quality metrics overview semantic scholar. To structure the ideas and provide a comprehensive framework several software quality models have been introduced. Software quality metrics focus on the quality aspects of the product, process, and project.
Software quality metrics for object oriented systems. In chapter 4 software metrics are introduced and di. A closely related work on software quality modeling is the socalled activitybased approach proposed by deissenboeck et al. This project is composed of a theoretical section about software quality and a case study where. Software metrics, measurement and analytical methods. Software metrics and soft computing models for component based software. Conversely, the quality factors of chapter 4 may be correlated with new. For software and physical products, the improvements are typically smaller but still substantial when you emphasize usability in the design process.
It provides an understanding of how current research and practice has contributed towards improving quality issues in software, interaction and value. The concepts of software metrics are well established, and many metrics relating to product quality have been developed and used. Software metrics overview software metrics provide a quantitative vehicle for evaluating and managing quality factors and risks related to a given software product. Product quality metrics software quality metrics overview. Nov 08, 2017 this book introduces software quality assurance sqa and provides an overview of standards used to implement sqa. Conversely, the quality factors of chapter 4 may be correlated with new software metrics. The components of the software quality assurance system overview 40 part ii.
Chapter 4 software process and project metrics overview software process and project metrics are quantitative measures that enable software engineers to gain insight into the efficiency of the software process and the projects conducted using the process framework. Endproduct quality metrics inprocess quality metrics the essence of software quality engineering is. Software quality metrics overview from metrics and models in software quality engineering. Metrics can be used at early stages as leading quality indicators of the. Without customers, theres no commerce online or offline. Metrics and models in software quality engineering.
Common objections to deployment automation metrics metrics overview chapter 9 standardize the development environment motivation how to apply the best practice controlling standards using gqm common objections to standardization metrics overview chapter 10 manage usage of thirdparty code. Good practice in software quality engineering, however, also needs to consider the customers perspective. Review of software quality metrics for objectoriented methodology. Product metrics describe the characteristics of the product such as size, complexity, design features, performance, and quality level. This chapter gives several examples for each category, summarizes the metrics programs at motorola, hewlettpackard, and ibm rochester, and. Metrics and models in software quality engineering, 2nd. Tools, techniques, and methodology of developing robust software book. Inprocess quality metrics software quality metrics. Its fairly easy to calculate simply divide the total marketing expenses for a period by the number of customers acquired during that same period. Identifying quality metrics enables businesses to measure and control processes designed to make highquality products. Software quality metrics overview metrics and models. Albert einstein price has no meaning without quality. Metrics and models in software quality engineering guide books.
Software engineers use product metrics to help them assess. Hd success metrics the level of success in responding to hd calls. Within the software development process, there are many metrics that are all related to each. Chapter 3 introduces software process improvements. Software metrics overview software engineering at rit. Advantage of using these process are also discussed. The report is organized so that new sqm can still be analyzed. It defines ways to assess the effectiveness of how one approaches. 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. Why does poor software quality continue to plague enterprises of all sizes in all industries. Naturally, the goal of any ecommerce business is to have a high conversion rate. Financial perspectives on trustworthy software the important thing is not to stop questioning.
In the last sections we also describe the key metrics used by several major software developers and discuss software metrics data collection. In this chapter an expansion and consolidation of the traditional software quality assurance sqa, software quality control sqc and software process improvement spi roles is proposed, in order to. Software quality metrics overview product metrics e. Ppt quality metrics powerpoint presentation free to. Objectives of quality measurement classification of software quality metrics process metrics product metrics implementation of software quality metrics limitations of software metrics the. It is useful to drive quality improvement from the development teams point of view.
Chapter 2 discusses the process of requirement engineering and requirements management followed by software requirements speci. Chapter 4, software quality metrics overview, presents examples of quality metrics for the three categories of metrics associated with the software life cycle. The subset of metrics that focus on quality software quality metrics can be divided into. For example, the inprocess quality metrics of a project are both. Software quality management software quality goals and objectives what the industry experts say. The method used by ibm rochester is also to count source instructions including executable lines and data definitions but excluding comments and program prologues. Sep 16, 2017 a software metric is a measure of software characteristics which are quantifiable or countable. In the past, various software quality models and metrics have. 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. Currently, the compendium describes 37 software quality attributes factors, criteria, and 23 software quality metrics.
Software metric is a qualitative indicator of any software dimension whereas model specifies the relationship among these metrics. Summary software quality metrics overview informit. These are more closely associated with process and product metrics than with project metrics. Performance metrics are collected at the entry point to each server in. Software metrics are important for many reasons, including measuring software performance, planning work items, measuring productivity, and many other uses.
The software artifacts concerned by metrics include analysis, and design models, as well as program code. Quality metrics for business process models padsweb. Mar 02, 2018 specialized chapter sections, examples, implementation tips, and topics for discussion. Specialized chapter sections, examples, implementation tips, and topics for discussion. Download citation software process quality metrics software quality. Sep 20, 2017 for the love of physics walter lewin may 16, 2011 duration. Software quality metrics overview product quality metrics informit. In ecommerce, conversion rate is the percentage of website visitors who actually make a purchase and become customers. Compendium of software quality standards and metrics version 1. Goal of the compendium of software quality standards and metrics is to provide an information resource connecting software quality standards with wellknown software metrics.
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