ISO 9126 Quality Model: 6 major features and 27 sub-features of the software quality model

ISO 9126 Quality Model: 6 major features and 27 sub-features of the software quality model

The ISO9126 Software Quality model is an international standard for evaluating software quality, and consists of 6 features and a Sub - characteristics, it is recommended that you understand the meaning and difference of each characteristic and sub-characteristic , It is necessary to test and evaluate a software from these 6 properties and the sub-characteristics. This model is the core of the software quality standards, for most of the software, you can consider from these aspects to proceed with the assessment.

First, the function of:

1, the suitability: provides the corresponding function

2, Accuracy: correct (user needs)

3. Interoperability: The ability to interact data between products and products

4. Confidential security: Allow authorized users and systems to access the appropriate data and information, prohibit unauthorized user access ....

5. Functional compliance: International/country/industry/enterprise Standard conformance

Second, reliability: the product under the specified conditions, within the specified time to complete the function of the ability to set

1, maturity: To prevent internal errors caused by the ability of software failure

2, fault tolerance: software failure, self-processing capacity

3. Easy to recover: recovery ability under failure condition

4. Compliance of reliability

Third, ease of use: under the specified usage conditions, the product is understood, learning, use and the ability to attract users

1, easy to understand:

2, easy to learn the nature:

3. Ease of operation:

4. Attraction:

5, Ease of compliance:

Iv. efficiency: The ability of the SOFTWARE PRODUCT to provide the appropriate performance in terms of the number of resources used, in the prescribed conditions

1. Time Characteristics: Average transaction response time, throughput rate, TPS (number of transactions per second)

2. Resource utilization: CPU memory disk IO network bandwidth queue shared memory

3. Efficiency compliance:

Five, software maintenance: "Four Rules", under the specified conditions, within the specified time, the use of prescribed tools or methods to repair the ability of the specified function

1, easy to analyze: Analysis of the difficulty of locating the problem of the degree

2. Easy to change: the ability of a software PRODUCT to enable a specified modification to be realized

3, Stability: Prevent accidental modification caused the program to fail

4, easy to test: the ability to make modified software can be confirmed

5, the maintenance of compliance

Vi. Software Portability: ability to migrate from one environment to another

1, adaptability: adapt to different platforms

2, easy to install: the ability to be installed

3. Coexistence:

4, easy to replace the sex

5, the Compliance of portability:

ISO 9126 Quality Model: 6 major features and 27 sub-features of the software quality model