Lecture 2 software metrics and estimation.
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![Subjective measure
For subjective metrics, even qualified observers may measure
different values for a given metric, since their subjective judgment is
involved in arriving at the measured value.
An example of a subjective product metric is the classification of
the software as “organic,” “semi-detached,” or “embedded,” as
required in the COCOMO cost estimation model [Boehm81].
Although most programs might be easy to classify, those on the
borderline between categories might reasonably be classified in
different ways by different knowledgeable observers.
level of programmer experience is likely to be a subjective measure.](https://image.slidesharecdn.com/metric2-250413063200-ed38487b/85/Lecture-2-software-metrics-and-estimation-11-320.jpg)
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A New Model for Study of Quality Attributes to Components Based Development A...Kiogyf A New Model for Study of Quality Attributes to Components Based Development Approach
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Software development costs, time - to release and quality product are important factors affecting the construction of software. Different types of tools and techniques are suggested by researchers to improve in delivering quality software systems with lower cost and reduce time to delivery. One such practice is development of software using ased Software Development (CBSD) techniques. CBSD recommended Component Bbuilding software systems using existing reusable components, instead of writing from scratch. The main objective of CBSD is to writes once and reuse any number of time with no or modification . Some of the advantages that a company may available by adapting CBSD for the Software development are shorter development time which results in meet tight dead line, increase productivity and Quality Product. CBSD also, s paper is to develop the new model of software support reusability. The aim of thiproduct and describe the characteristics of some selected of attributes of CBSD models that are widely practiced in software industries. We proposed a complete model for or reuse. This Model will cover both Component Based Software Development fcomponent based software development as well as Component development phases for
A - Model. This Model is represent one good solution for Component Based Development with reduce cost and time to deliverable and save the quality of product . Keywords: Component Based Approach, Quality Model, Quality Attributes, , A - Model for CBD .
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Lecture 2 software metrics and estimation.
- 1. Software metrics lecture 2 ENGR. FAIZ UL HAQUE ZEYA
- 2. Software metrics categories. 1. Product metrics. 2. Process metrics. 3. Project metrics.
- 3. Another way to categorize Objective metrics. Subjective metrics.
- 4. . ProcessMetrics: It can be used to improve the process efficiency of the SDLC(Software Development Life Cycle). These are metrics that pertain to Process Quality. They are used to measure the efficiency and effectiveness of various processes. –Efforts required –Time to produce the product –Numbers of defect found –Tools and technology –Efficiency
- 6. Product Metrics: It deals with the quality of the software product. These are metrics that pertain to Product Quality. They describe the characteristics of the product such as size, complexity, design features, performance, and quality level. –Size –Complexity –Design features –Performance –Reliability
- 8. Project Metrics: It can be used to measure the efficiency of a project team. These are metrics that relate to Project Quality. They describe the project characteristics and execution –Number of software developers –Staffing pattern over the life cycle of the software –Cost –Schedule –Productivity. –Progress of on going project
- 10. Objective measure Objective metrics should always result in identical values for a given metric, as measured by two or more qualified observers. For product metrics, the size of the product measured in lines of code (LOC) is an objective measure, for which any informed observer, working from the same definition of LOC, should obtain the same measured value for a given program Development time is an example of an objective measure
- 11. Subjective measure For subjective metrics, even qualified observers may measure different values for a given metric, since their subjective judgment is involved in arriving at the measured value. An example of a subjective product metric is the classification of the software as “organic,” “semi-detached,” or “embedded,” as required in the COCOMO cost estimation model [Boehm81]. Although most programs might be easy to classify, those on the borderline between categories might reasonably be classified in different ways by different knowledgeable observers. level of programmer experience is likely to be a subjective measure.