describe the quantitative measures in software maintainability

[21] T. L. Saaty, and L. G. Vargas, “Models, Methods, Concepts & Applications of the Analytic Hierarchy Process”, Kluwer Academic Publisher, 2001. Pfleeger,"Software Metrics: A Rigorous and Practical Approach", (2nd Edition), International Thomson Computer PRESS, 1997. [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. G.R. One good measure of maintainability would be time required to fix a fault. [11] D. Garlan, and S. Khersonsky, "Model Checking Implicit Invocation Systems", 10th Int. The service addresses emerging priority agendas of concern … A Quantitative Evaluation of Maintainability of Software Architecture Styles. [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. Lack of investigation on the quantitative impact of architecture styles on software quality attributes is the main problem in using such styles. For more critical decisions, quantitative risk analysis provides more objective information and data than the qualitative analysis. Reliability, maintainability, and availability (RAM) are three system attributes that are of great interest to systems engineers, logisticians, and users. Software quality measurement quantifies to what extent a software program or system rates along each of these five dimensions. It measures how consistently participants respond to one set of items. Software metrics as means of quality analysis has attracted a lot of attention among researchers and practitioners in last one decade. Finding ways to measure this important factor eases developer effort, decreases costs, and frees up resources. Product operation factors− Correctness, Reliability, Efficiency, Integrity, Usability. 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. Proper decisions play a crucial role in any software architecture design process. Pfleeger, and J.M. Architectural Patterns Revisited: A Pattern Language, "Creative Commons Attribution-NonCommercial 2.0 Generic (CC BY-NC 2.0)". [4] B. Harrison, and P. Avgeriou, "Leveraging Architecture Patterns to Satisfy Quality Attributes", 1st European Conf. -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. on Software Maintenance and Reengineering, 2002, pp.99 – 107. 1. An important decision of design stage is the selection of a suitable software architecture style. Understanding software maintainability allows organizations to identify improvement areas as well as determine the value supplied by current applications or during development changes. 70-80. • Indicator – – A metric that provide insight into the SW process, 1. Lafuente,"Graph-based Design and Analysis of Dynamic Software Architectures", LNCS 5065, pp. Measuring software maintainability Master’s Thesis Espoo, August 10, 2015 Supervisor: Professor Marjo Kauppinen, Aalto University Advisor: Robert Brotherus Lic.Phil. There is no substitute for a human reviewer, but even humans can’t analyze the entire code repositories to give a definitive answer. 1, pp. /Filter /FlateDecode The Software Improvement Group (SIG) has developed a method to measure a software system's maintainability based on well-known code metrics. [7] R. Bruni, A. Bucchiarone, A. Gnesi, D. Hirsch, and A.L. Shahmohammadii, G., Jalili, S. (2009). INTRODUCTION Many resources are spent on software maintenance. Eng, 14, pp. 277-280. Typical measures would be mean time between failures (MTBFs), system reliability, availability, etc. Conf. (Chem.) 140 – 145. [25] N. Fenton, and A. Melton, "Deriving Structurally Based Software Measures", Journal of Systems and Software 12(3), pp. – Example: defects found in component testing/LOC of code tested. i�-� Business decisions are rarely made with all the information or data we desire. /Length 13 0 R Hwang, K. Yoon, "Multiple Attribute-Decision Making", Springer-Verlag, 1981. Metrics validation confirms fitness of the metrics. on Software Maintenance, 1999. Better Business Decisions. Timo Lehtinen D.Sc. �O��F�ҝe;P*�ٝ�F�UR}�M�0�g�k��_x�%,��Q��A8��3]��@��%/�W��`�̙zPM��N�f�Sm�*A��Xgg�I��CW��"t[�Įj8|}�{6t�4!b��z0�4jʳxY��5��nyl��$�Sn��p��4=^.��&�؟c�,�m�B�s?N ��8!��ؓ� �n��!��^w-�J��J��4O�\��j��|��(q�J��}u��wt T;��(�y��bhkQ�uW��n��oW��PEu32��(m�#��d+z�Q�G� ��6��vW}s�~9�m��,天��Ҷ�w�Ǫ�nآ�NB�?5��I�*[Dji�z��1�#�@ь��h "A Quantitative Evaluation of Maintainability of Software Architecture Styles". It was developed by Thomas J. McCabe, Sr. in 1976. Change of the reusability code is not considered by these researchers. [14] L. Briand, J. Wust, and H. Lounis, "Using Coupling Measurement for Impact Analysis in Object-Oriented Systems", IEEE Int. [27] NE. 2. H��Wێ��~��杏�x�l��a��`��l�zM�2��v��9�^$��OU�s�+{��/��3�i�z��`-{x{x��8�#Ƴ +;�{��Û�!+�2��Ǉ0�E��~�c�?~>"��g��*0g�Qk��j�هˠ΢a�u��*��c_�� aě_�j�O�QË��%��SBx��0�3�&q��G8呗�>>��`b�yE�GI��2%�؛��"@��&@�y�(�ɞ '��V�J�rǴ�Ǹ��S�kv�$��X+Yӯ͙!��(S��| In this study, architecture styles are quantified based on coupling, complexity and cohesion metrics and ranked by analytic hierarchy process from a maintainability viewpoint. • Metric (IEEE Standard Glossary of Software Engineering Terms) – A quantitative measure of the degree to which a system, component or process possesses a given attribute. maintainability of a software architecture based on a spec- ified scenario profile. Reliability is the wellspring for the other RAM system attributes of availability and maintainability. 2.6.2 System Maintainability Describe the system for the purpose of maintainability. Deliberate time management is what developers have often problems with. Collectively, they affect both the utility and the life-cycle costs of a product or system. SOFTWARE MAINTAINABILITY ASSESSMENT BASED ON COLLABORATIVE CMMI MODEL Haneen Al-Ahmad1, ... controlled using statistical and other quantitative techniques. We also describe the repository extraction tool that we built for this purpose. In this chapter, we explain what we mean when we speak about maintainability. The aim of this research is to quantify the impacts of architecture styles on software maintainability that is an expected quality of each software. 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). The origins of contemporary reliability engineering can be traced to World War II. [13] L. Briand, S. Morasca, and V. Basili, "Property Based Software Engineering Measurement", IEEE Trans on Software Eng., Vol. A criteria-based assessment gives a measurement of quality in a number of areas. 3. Fenton, and SL. [1] L. Bass, P. Clements, and R. Kazman,"Software Architecture in Practice" (2nd Edition), Addison-Wesley, 2003, p. 89. 152, No 4,pp. Shahmohammadii; S. Jalili. [16] P. Yu, T. Systa, and H. Muller, "Predicting FaultProneness using OO Metrics. This measure of reliability is described most often using Cronbach’s alpha (sometimes called coefficient alpha). Number of software releases – This is the basic measurement of how frequently new software is delivered to users. 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. Along each of these five dimensions, Prentice Hall,1978 be mean time between failures MTBFs... 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