Usability of system and software – Part 2: Metric method
1 Scope
This part of GB/T 29836, based on the indicator system put forward in GB/T 29836.1, stipulates the metric equation for the usability of the system and software and provides the supplier, acquirer and third-party evaluation and test organization with a unified metric method for the usability.
This part is applicable to all kinds of systems and software with human-computer interaction, but it is not applicable to the systems and software without human-computer interaction function or without usability needs during use.
Note: The systems referred to in this part are mainly software systems.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 11457 Information technology - Software engineering terminology
GB/T 16260.1 Software engineering - Product quality - Part 1: Quality model (GB/T 16260.1-2006, ISO/IEC TR 9126-1: 2001, IDT)
GB/T 29836.1-2013 Usability of system and software - Part 1: Indicator system
3 Terms and definitions
For the purposes of this document, the terms and definitions established in GB/T 29836.1-2013, GB/T 16260.1 and GB/T 11457 apply.
4 General
Usability is an important quality characteristic of the system and software. Usability metric of the system and software can help understand whether the software meets the usability requirements, and help the acquirer, the supplier, etc., find and locate any usability defect in time.
Prior to the metric, granularity of related metric objects (e.g., tasks and functions) should be declared in advance.
This part puts forward a set of software usability quality metrics used together with GB/T 29836.1. Users should choose the usability indicator from GB/T 29836.1, and determine the metric and corresponding test method according to the indicator. For a specific system or software, different modules or functions have different requirements for the usability. Therefore, appropriate indicators may be selected according to specific goals of usability to improve the accuracy of the usability metric. Function points completely unrelated to the usability and other indicators that can’t be subjected to the metric may be abandoned during the metric.
5 Understandability
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Understandability
6 Learnability
7 Operability
8 Attractiveness
9 Evaluation method for usability
9.1 General
9.2 Determining evaluation factors and ratings
9.3 Constructing evaluation matrix and determining weight
9.4 Carrying out fuzzy synthesis and decision making
Annex A (informative) Example for usability evaluation of online scoring system
Bibliography
