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4. Web Quality

4. Web Quality. What is Quality?. Q uality : multidimensional and abstract concept . Q uality assessment: quantification of lower abstraction concepts , such as attributes of entities . A ttribute : measurable property of an entity. Types of entities in Web engineering : resource,

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4. Web Quality

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  1. 4. Web Quality Web Engineering, ITBK 2010 (Muhyi)

  2. What is Quality? • Quality:multidimensionaland abstract concept. • Quality assessment: quantification of lower abstraction concepts, such as attributes of entities. • Attribute: measurable property of an entity. • Types of entities in Web engineering: • resource, • process, • product, • product in use, • and service. • Quality abstract relationship between attributes of entities andinformation needs (measurement goals). Web Engineering, ITBK 2010 (Muhyi)

  3. Standards and Quality • ISO/IEC 9126  software quality: meet user needs • Six characteristics: • Usability • Functionality • Reliability • Efficiency • Portability • Maintainability Web Engineering, ITBK 2010 (Muhyi)

  4. Usability is broken down to ... Web Engineering, ITBK 2010 (Muhyi)

  5. Quality Approaches • Internal Quality • “the totality of attributes of a product that determines its ability to satisfy stated and implied needs when used under specified conditions” • Static attributes of documents  such as specification of requirements, architecture, or design, pieces of source code, etc. • External Quality • “the extent to which a product satisfies stated and implied needs when used under specified conditions” • Dynamic properties  of the running code in a computer system • Quality in use • “the extent to which a product used by specified users meets their needs to achieve specified goals with effectiveness, productivity and satisfaction in specified context of use” • Excellence  effectiveness, productivity, safety, and satisfaction. Web Engineering, ITBK 2010 (Muhyi)

  6. Framework of Quality Web Engineering, ITBK 2010 (Muhyi)

  7. Quality in Use Characteristics Web Engineering, ITBK 2010 (Muhyi)

  8. What is Web Quality? • Web is information media  so one more characteristic needed: content • Content characteristic is divided into: • Information accuracy. • Information suitability. • Accessibility. • Legal compliance. Web Engineering, ITBK 2010 (Muhyi)

  9. Web Quality Evaluation Method (WebQEM) • Domain expert (not just a user) • Quantitative, model-centered and objective (not subjective view) • WebQEM phases: • Quality Requirements Definition and Specification. • Elementary Measurement and Evaluation (Design and Implementation). • Global Evaluation (Design and Implementation). • Conclusion and Recommendations. Web Engineering, ITBK 2010 (Muhyi)

  10. WebQEM Evaluation Process Web Engineering, ITBK 2010 (Muhyi)

  11. Sample: Attribute Analysis Web Engineering, ITBK 2010 (Muhyi)

  12. WebQEM Tool Web Engineering, ITBK 2010 (Muhyi)

  13. Sample: Benchmarking Web Engineering, ITBK 2010 (Muhyi)

  14. Thank you ... Discussion, Q & A Web Engineering, ITBK 2010 (Muhyi)

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