277-280. 1. An important decision of design stage is the selection of a suitable software architecture style. Maintainability can be defined as the ease with which a software product can be modified to correct errors, to meet new requirements, to make future maintenance easier, or adapt to the changed environment. The origins of contemporary reliability engineering can be traced to World War II. [18] F. Bachmann, L. Bass, M. Klein, M. and C. Shelton, “Designing Software Architectures to Achieve Quality Attribute Requirements”, IEE Proc. But the quantitative analysis allows us to evaluate the overall project risk from the individual risks plus other sources of risks. 152, No 4,pp. Here are the main reasons why they are extremely using these methods: 1. This measure of reliability is described most often using Cronbach’s alpha (sometimes called coefficient alpha). approach for quantitative maintainability assessment of DPRA models created with an industrial modeling tool called PyCATSHOO. [27] NE. This model classifies all software requirements into 11 software quality factors. Many important phenomena within software engineering are difficult to define and measure. 177-187, 1990. Better Business Decisions. [23] ISO, International Organization for Standardization, “ISO9126-1:2001, Software Engineering – Product quality, Part 1: Quality model”, 2001. 2. We review and adopt some metrics from conceptual modeling, software engineering and OO design for assessing maintainability of PyCATSHOO models. Regarding the great impact of this decision on maintainability of software product, the presented parametric model provides a basis for sensible selection of architecture style. Productivity depends on the time you spend on tasks and other in-house activities. SOFTWARE MAINTAINABILITY ASSESSMENT BASED ON COLLABORATIVE CMMI MODEL Haneen Al-Ahmad1, ... controlled using statistical and other quantitative techniques. stream
The measure m ust form the basis for comparisons across pro jects (e.g. 1. [16] P. Yu, T. Systa, and H. Muller, "Predicting FaultProneness using OO Metrics. The 11 factors are grouped into three categories – product operation, product revision, and product transition factors. Proper decisions play a crucial role in any software architecture design process. on Software Maintenance, 1999. In particular, the assessment of maintainability has received attention. Criteria-based assessment is a quantitative assessment of the software in terms of sustainability, maintainability, and usability. Conf. [5] P. Avgeriou P, and U. Zdun, "Architectural Patterns Revisited: A Pattern Language", Proc. Software quality measurement quantifies to what extent a software program or system rates along each of these five dimensions. In an attempt to address this issue quantitatively, software maintainability is viewed as an inevitable evolution process driven by maintenance behaviors, given a health index at the time when a software product are delivered. "A Quantitative Evaluation of Maintainability of Software Architecture Styles". on Software Architecture, Springer, pp. For more critical decisions, quantitative risk analysis provides more objective information and data than the qualitative analysis. Why do development teams use metrics to measure quality? as to describe them according to specified rules. i�-� Pfleeger, and J.M. products in the modern world, its quantitative specification is clearly needed and desired. It is a quantitative measure of the number of linearly independent paths through a program's source code. -There are two broad use of measurement: assessment and prediction: ÷Predictive measurement of some attribute A relies on a mathematical model relating A to some existing measures of attributes A1, …, An. Proper decisions play a crucial role in any software architecture design process. Lafuente,"Graph-based Design and Analysis of Dynamic Software Architectures", LNCS 5065, pp. maintainability of a software architecture based on a spec- ified scenario profile. [8] H. Reza, and E. Grant, "Quality-Oriented Software Architecture", The IEEE Int. [3] C. Seo, G. Edwards, S. Malek, and N. Medvidovic," A Framework for Estimating the Impact of a Distributed Software System’s Architectural Style on Its Energy Consumption", 7th Working IEEE/IFIP Conf. Collectively, they affect both the utility and the life-cycle costs of a product or system. 1043 – 1049, 2003. Measuring software maintainability Master’s Thesis Espoo, August 10, 2015 Supervisor: Professor Marjo Kauppinen, Aalto University Advisor: Robert Brotherus Lic.Phil. Mapping of program characteristics into these metric values indicate structural complexity and behavior of an information system. Software metrics, Halstead measure, maintainability, modifiability, software architecture, software deterioration. There is no substitute for a human reviewer, but even humans can’t analyze the entire code repositories to give a definitive answer. [17] M. Alshayeb, and L. Wei, "An Empirical Validation of Object-Oriented Metrics in Two Different Iterative Software Processes," IEEE Trans on Software Engineering, Vol. A Hidden Markov Model (HMM) is used to simulate the maintenance behaviors shown as their possible occurrence probabilities. Understanding software maintainability allows organizations to identify improvement areas as well as determine the value supplied by current applications or during development changes. quality and mapping them into quantitative measures is a crucial factor in sustainable success of an end product. After that, we discuss why maintainability is important. On the example of well-known "Heated Room" test case, we illustrate how the selected metrics can serve as … Software Maintainability Metrics Help Identify Problem Areas . Conte reuse measure is estimating coding effort. The maintainability of a software system is determined by properties of its source code. Cyclomatic complexity is computed using the control flow graph of the program: the nodes of the graph correspond to indivisible groups of commands of a … ... A method for measuring code complexity was developed by Thomas McCabe and with this method a quantitative assessment of any piece of code can be made. Reliability is the wellspring for the other RAM system attributes of availability and maintainability. on Software Architecture, 2009, pp. U���=ἆ�uG�=Vb���/-��~P��w���2Z^��ga�F��,se�M��N� 12 0 obj
Maintainability measures can be calculated and recorded at regular intervals, showing trends in maintainability, both positive and negative. ho often fails, and m uc h eac failure costs) rather than (someho w) t wice the same feature. [24] E. Yourdon, and L. Constantine, "Structured Design", Englewood Cliff, NJ, prentice Hall,1978. To track and increase productivity managers use metrics identifying and prioritizing emerging issues. Pfleeger,"Software Metrics: A Rigorous and Practical Approach", (2nd Edition), International Thomson Computer PRESS, 1997. An Industrial Case Study," 6th European Conf. Conte [14], Boehm [12], Bailey [2], and Fenton [3] describe reusability measuring that are based on comparisons between the size of the newly written code in particular software product and the length or size of reusability code. AUT Journal of Electrical Engineering is licensed under a"Creative Commons Attribution-NonCommercial 2.0 Generic (CC BY-NC 2.0)", Amirkabir University of Technology (Tehran Polytechnic). Eng, 14, pp. 153- 165, 2005. [22] L. Bass, P. Clements, and R. Kazman," Software Architecture in Practice", Addison-Wesley, 1998, p. 17. The Software Improvement Group (SIG) has developed a method to measure a software system's maintainability based on well-known code metrics. [26] M. J. Shepperd, and D.C. Ince, "The use of metrics in the early detection of design errors", Proc.of the European Software Engineering Conf, 1990, pp.67-85. of Int. In this chapter, we explain what we mean when we speak about maintainability. The service addresses emerging priority agendas of concern … 68-86, 1996. [6] J.S Kim, and D. Garlan, "Analyzing Architectural Styles with alloy", Proc. G.R. (Chem.) [12] M. Shaw, D. Garlan, "Software Architecture: PerspectivesDiscipline on an ٍEmerging Discipline”, Prentice Hall, 1996. The problem of maintaining software is 20, pp. Quantitative and qualitative methods in impact evaluation and measuring results i GSDRC Emerging Issues Research Service This Issues Paper was commissioned by the UK Department for International Development (DFID) through the Emerging Issues Research Service of the Governance and Social Development Resource Centre (GSDRC). /Length 13 0 R
29 (11), pp. of Software, Vol. These techniques model the reliability based on particular assumptions or preconditions on probability distribution of cumulative number of failures, failure data observed, and form of the failure intensity function, etc. [2] F. Buschmann, R. Meunier, H. Rohnert, P. Sornmerlad, and M. Stal, "Pattern-Oriented Software Architecture- A system of Patterns", John Wiley & Sons, 1996, p. 394. /Filter /FlateDecode
Metrics validation confirms fitness of the metrics. Change of the reusability code is not considered by these researchers. [7] R. Bruni, A. Bucchiarone, A. Gnesi, D. Hirsch, and A.L. Provide a block diagram. Shahmohammadii, G., Jalili, S. A Quantitative Evaluation of Maintainability of Software Architecture Styles. Cyclomatic complexity is a software metric used to indicate the complexity of a program. And software metrics is the measurement of the quality of a software product and its measurement … 140 – 145. 1, pp. Maintainability Index (MI) is an indicator of software maintenance efforts, but that can be computed only after the complete code is developed. of the ISSTA 2006 workshop on Role of Software Architecture for Testing and Analysis, 2006, pp. on Pattern Languages of Programs، 2005, pp.1-39. A criteria-based assessment gives a measurement of quality in a number of areas. 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describe the quantitative measures in software maintainability