After that, we discuss why maintainability is important. This approach for measuring failure rates has been widely used [1, 19]. Maintainability Index (MI) [article cited from Wikipedia] Maintainability Index is a software metric which measures how maintainable (easy to support and change) the source code is. ho often fails, and m uc h eac failure costs) rather than (someho w) t wice the same feature. Several models of software quality factors and their categorization have been suggested over the years. 1. In particular, Oman et al. This book discusses these properties and presents 10 guidelines to help you write source code that is easy to modify. Many software metrics have been proposed as indicators for software product quality [4], [5]. A high value means better maintainability. It calculates how easy it is to identify problems with a system and solve the problem. However, existing definitions of maintainability, such as the Halstead Volume, McCabe's Cyclomatic Complexity or the SEI maintainability index provide a very poor understanding of what maintainability is how it can be assessed and ultimately controlled. INTRODUCTION In the field of software engineering, developing a software product for the purpose of meeting its functional requirements is important. (Tech) Maintenance forms the major part of the software’s development costs. Identify the complexity and maintainability of your code It’ll give you an insight of your code maintainability and complexity. ); therefore, the ability to maintain a software application with respect to safety is essential. It is also essential to keep maintenance costs under control. The following list shows the code metrics results that Visual Studio calculates: Maintainability Index - Calculates an index value between 0 and 100 that represents the relative ease of maintaining the code. Keywords Software metrics, Halstead measure, maintainability, modifiability, software architecture, software deterioration. Software maintainability is defined as the ease with which a software system or a component can be modified, to correct faults, improve performance or other attributes, or adapt to a changed environment. The readability and understandability of both source code and documentation should be considered to measure the maintainability. Both metrics are easy to game, especially when you're not measuring maintainability. The Automated Source Code Maintainability Measure is an industry-supported standard that outlines a set of 29 critical coding and architecture weaknesses to avoid in source code because of their impact on the maintainability of a software application. Categories and Subject Descriptors D.2.8 [Software Engineering]: Metrics performance measure General Terms Measurement, Design Keywords Software, Maintainability, Metrics, Object-oriented system, CK metric suite 1. Maintainability and flexibility at the software level are of predominant importance to drive innovation at the business process level. It was proposed by Oman and Hagemeister in the early nineties. Fenton and Pfleeger [1997] call these external product attributes – attributes that are measured with respect to how the product relates to the environment. In a public payphone for example, the target Time to Repair might be 15 minutes (on-site time) to restore a faulty payphone to full working order. The maintainability index is calculated as a factored formula consisting of Lines Of Code, Cyclomatic Complexity and Halstead volume. If the total number of failures in all the N installations in a time period T is F, then the best estimate for the failure rate of the software is [18] λ = F / (N * T) . Within the software architecture, measures such as watchdog timers, flow control, data integrity checks (e.g., hashing or cyclic redundancy checks), input and output validity checking, retries, and restarts can increase reliability and failure detection coverage (Shooman 2002). I have defined maintainability as: a measure of the effort required to change the functionality of application software. Software measurements. The maintainability of a software application is the most important attribute after safety. One measure of maintainability is Time to Repair (TTR, also known as ‘turn-around time’). In general any software development manager is familiar with this definition of ‘effort’ as it applies to creating software. Maintainability measures the ability to maintain or restore a piece of equipment to its functioning state. Menu. Is it difficult to maintain your software? Software metrics is a predictor to assess and predict software quality; however, although maintenance is a critical task, it has been poorly managed due to inadequate measurement, so we need precise criteria for measuring software maintenance (Rizvi & Khan, 2010). Resources for measuring and assessing software quality. This is because the quality of the final software product depends on the first stage of the solution – namely the software architecture [6,7]. Taxi Biringer | Koblenz; Gästebuch; Impressum; Datenschutz 5. It is also important to check the testability and understandability. A software system’s maintainability can be determined by measuring the maintenance process, e.g. Having some heuristics and metrics that measure an application’s source code provides a useful starting point, and observing these metrics over time can identify important trends. Software maintainability is a crucial property of software projects. (Chem.) Measuring and monitoring maintainability is a must for mission-critical applications where change is driven by tight time-to-market schedules and where it is important for IT to remain responsive to business-driven changes. Maintainability. [1,4]. Typically,thesemethodsuseasetofwell-knownmet- rics like lines of code, Halstead volume [9], or McCabe’s Cyclomatic Complexity [18] and combine them into a sin-gle value, called maintainability index by means of statisti-cally determined weights. A good metric to measure software maintainability is the holy grail of software metrics. How well does the product support the testing? Thus, producing software that is easy to maintain may potentially save large costs. Testability. metrics-based methods to measure attributes of software systems which are believed to affect maintenance, e.g. In this chapter, we explain what we mean when we speak about maintainability. For example, maintainability but each of the factors is to be measured to check for the content and the quality control. Maintainability testing shall use a model of the maintainability requirements of the software/system. Keep- ing the software’s code base in a good shape, i.e. If that would succeed we could track that metric in our nightly builds and use it like the canary in the coal mine. \A is more main-tainable than B") ev en when the pro jects at hand deal with di eren t applications. Software complexity metrics, for example, rarely measure the proposed the Maintainability Index (MI) [6], [7]: an attempt to objectively determine the maintainability of software systems based upon the status of the source code. The measure m ust form the basis for comparisons across pro jects (e.g. And ensuring maintainable source code relies on a number of factors, such as testability and understandability. What we would like to achieve with such a metric is that its values more or less conform with the developers own judgement of the maintainability of their software system. Shortsightedness and deadlines result in huge amounts of technical debt that never really get addressed. Let’s find it out using the structure, size, complexity, and consistency metrics that analyze the codebase. System RAM characteristics should be continuously evaluated as the design progresses. 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