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Customizing ISO 9126 Quality Model for

Evaluation of B2B Applications

Behshid Behkamal, Mohsen Kahani, Mohammad Kazem Akbari

Information and Software Technology

vol.51 pp.599–609, 2009.

報告者: 葉承宇 (Dean Yeh)

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Abstract

• A software quality model acts as a framework for the evaluation of attributes of an application that contribute to the software quality.

• The most well-known quality models are studied, and reasons for using ISO 9126 quality model as the basis are discussed.

• The customization is done by extracting the quality factors from web applications and B2B EC applications, weighting these factors from the viewpoints of both developers and end users, and adding them to the model.

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B2B Application

Customizing Quality Model

Quality Model (ISO 9126)

B2B Characteristics

Web Characteristics

Overview

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Introduction

• Review of Quality Models

• B2B Electronic Commerce

• Need to customize ISO Model for B2B applications

• Our approach for customizing ISO Quality Model

• Applying the proposed model to a case study

• Evaluation & Discussion

• Conclusion & Future works

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What is software quality?

http://www.cse.dcu.ie/essiscope/sm2/charact.html

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McCall Model

http://www.cse.dcu.ie/essiscope/sm2/charact.html

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Boehm Model

http://slashnode.wikidot.com/seng4420-lect117/30

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FURPS Model

• FURPS

• Functionality

• Usability

• Reliability

• Performance

• Supportability

• +

• Design requirements

• Implementation requirements

• Interface requirements

• Physical requirements

Functional requirements

Non-functional requirements

IBM Software Group - Non-Functional Requirements

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Dromey Model

Quality attributesProduct propertiesSoftware product

Implementation

CorrectnessFunctionality

Reliability

InternalMaintainability

Efficiency

ContextualReusability

Portability

Descriptive Usabilityhttps://export.writer.zoho.com/public/pakitosh/untitled1/fullpage

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ISO Model

http://carballosa.blogspot.tw/2010/05/quint2-extended-iso-9126.html

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Star Model

A Quality Model for Design Patterns

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BBN Model

Data collection of Observation Bayesian belief network Diagram

http://zh.wikipedia.org/wiki/貝式網路

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Comparison of software quality models

Quality model

StructureNumber of levels

Relationship Disadvantages Advantages

McCall Hierarchical Two Many to manyOverlapping of components

Having evaluation criteria

Boehm Hierarchical Three Many to many Lack of criteria Including factors related to hardware

FURPS Hierarchical Tow One to manyNot considering portability

Separating functional and non-functional requirements

Dromey Hierarchical Tow One to many Incomprehensiveness Applicable to different systems

ISO Hierarchical Three One to many Generality– Having evaluation criteria– Separating internal and external quality

StarNon-hierarchical

– Many to many Lack of criteria Considering different viewpoints

BBNNon-hierarchical

– Many to many Lack of criteria Having weighted quality factors

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B2B Electronic Commerce

Benchmarking: An International Journal - Benchmarking business-to-business electronic commerce

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Customize ISO model for B2B applications

Review of software quality

assessment methods

Expert Review

Software Metrics

Quality Model

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Customizing ISO quality model

Step 1: Choosing ISO quality model as a basis.

Step 2: Identifying quality characteristics of a particular application.

Step 3: Choosing a group of software expert familiar with B2B ecommerce systems.

Step 4: Assigning weights to the quality factors and sub factors by experts.

Step 5: Developing the quality criteria.

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Identifying quality characteristics of B2B applications

Web Application Quality

Quality factor Rank

Efficiency 1

Security 2

Usability 3

Traceability 4

Availability 5

Scalability 6

Functionality 7

Customizability 8

Recoverability 9

Consistency (Data) 10

The Quality of B2B Applications

Quality factor Total points Quality factor Total points

Security 5 Intractability 2

Scalability 5 Functionality 2

Efficiency 5 Customizability 2

Accessibility 5 Supportability 1

Traceability 3Open source platform

1

Reliability 3 Portability 1

Integrity 3 Generality 1

Usability 2 Changeability 1

Manageability 2 Compatibility 117

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Applying the proposed model to a case study

First and second levels of proposed model with their weights

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Analytical hierarchy process (AHP)

http://en.wikipedia.org/wiki/Analytic_hierarchy_process#Uses_and_applications

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Development of quality criteria

Relationships between quality factors and quality criteria

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Development of quality criteria

Relationships between quality factors and quality criteria

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Applying the proposed model to a case study

Design and completion of the evaluation checklist

Calculating the values of the quality factors

Calculating the values of the model’s components

Calculating the final quality of system

Evaluation of ISACO portal

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Calculating the values of the quality factorsNumerical values of model’s components for ISACO portal

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Calculating the values of the model’s components & final quality of system

Final quality of system from both viewpoints

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Evaluation and Discussion

• Comprehensiveness

• Web document architecture

• Considering different viewpoints

• Understandability

• It has all of these factors, so it has higher level of clarity and understandability in comparison with other models.

• Accuracy

• Considering the difference between the weights of values of the quality factors from the users’ and developers’ viewpoint.

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Relation between quality factors and web document architecture

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Quality evaluation of ISACO by ISO model

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Conclusion and Future works

• In general, the contributions of this paper can be summarized into three areas:

• Presenting a method for customizing a general quality model for evaluation of a particular domain;

• Considering two main viewpoints(Developer & Viewer) in quality assessment of software products and presenting a method for weighting the quality factors.

• Due to the novelty of e-commerce systems, there are many research directions in which this work can be expanded.

• Therefore, focusing on environmental infrastructures as another dimension of the model may be an appropriate research direction.

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Thanks for Your Listening

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