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Unit 6 · Software Engineering

According to the ISO-9126 Standard Quality Model, match List-I with List-II:
List-I (Attributes)
(a) Functionality
(b) Reliability
(c) Efficiency
(d) Maintainability
List-II (Definitions)
(i) Relationship between level of performance and amount of resources used
(ii) Characteristics related with achievement of purpose
(iii) Effort needed to make for improvement
(iv) Capability of software to maintain its level of performance
Choose the correct answer from the options given below:

Pick an option to check yourself, or open the answer below.

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Correct answer: C. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

Explanation

ISO 9126 defines six product-quality characteristics, four of which appear here. Functionality is about whether the software provides functions that meet stated needs, i.e. characteristics related with achievement of purpose, so (a)-(ii). Reliability is the capability of the software to maintain its level of performance under stated conditions for a stated period, so (b)-(iv). Efficiency is defined exactly as the relationship between the level of performance and the amount of resources used, so (c)-(i). Maintainability is the effort needed to make modifications or improvements, so (d)-(iii). The correct pairing is therefore (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii), option (iii).

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