Boehm's Model
Q: 1 Provide a summary, written in your words of research paper “A Review of Research on cost of quality models and best practices”?
In this research paper the author presents a study on the quality cost approaches. Companies that adopt the CoQ succeed in reducing costs of quality and improvement of quality for customers and companies that do not comply with the expensive failure of CoQ to some extent. Many companies promoting the quality, because it is the most important part for achieving competitiveness. In order to achieve a Continuous improvement it is necessary to meet customer’s requirements and do it at the lowest cost.
Tsai in his article carries out are view of CoQ model and the literature related to them and the main focus is on
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1. BOEHM’s Model
2. DROMEY’s Model
3. CISQ's quality model
Boehm’s Quality model (1978)
It presents a hierarchical quality model structured around high-level characteristics, intermediate level characteristics, primitive characteristics each of which contributes to the overall quality level. The high-level characteristics includes: As-is utility, Maintainability, Portability.
The intermediate level characteristic represents Boehm’s 7 quality factors that are Portability, Reliability, Efficiency, Usability, Testability, Understandability, Flexibility together represent the qualities expected from a software system. The lowest level structure of the characteristics hierarchy in Boehm’s model is the primitive characteristics metrics hierarchy. The primitive characteristics provide the foundation for defining qualities metrics.
.Dromey’s Quality model (1995):
Dromey has built a quality evaluation framework that analyses the quality of software components through the measurement of tangible quality properties. According to Dromey , all these components possess intrinsic properties that can be classified into four
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Security. Although security denotes different things with respect to software systems, in general, it is associated with four principles:
• Confidentiality: Access to information/service is granted only to authorize subjects.
• Authenticity: We can trust that the indicated author/sender is the one responsible for the Information.
• Integrity: Information is not corrupted.
• Availability: The information/service is available in a timely manner.
3 Scalability: it is ability of a system to either handle increases in load without impact on the performance of the system, or the ability to be readily enlarged
Q: 3 mention the Quality Attribute list used by IBM to evaluate the quality of their products?
Two leading firms IBM and Hewlett-Packard have given a great deal of considerence on software quality. Following are the different Quality Attribute used by IBM to evaluate the Quality of their product
Category Quality Attribute Description
Design Qualities Conceptual Integrity Conceptual integrity defines the consistency and coherence of the overall design. This includes the way that components or modules are designed. Maintainability Maintainability is the ability of the system to go through
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