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ISO TS 20282-2 2nd Edition, August 1, 2013 Usability of consumer products and products for public use - Part 2: Summative test method
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO/TS 20282 specifies a user-based summative test
method for the measurement of the usability and/or accessibility of
consumer products and products for public use (including
walk-up-anduse products) for one or more specific user groups. This
test method treats accessibility as a special case of usability
where the users taking part in the test represent the extremes of
the range of characteristics and capabilities within the general
user population. When the test method refers to usability, the
method can also be used to test accessibility (unless otherwise
specified).
This test method is for use when valid and reliable measures of
effectiveness, efficiency, and satisfaction are needed.
NOTE 1 Products for public use include walk-up-and-use products
that provide a service to the general public.
The test method can also be used to assess the usability and/or
accessibility of achieving the goals of unpacking, installing, and
setting up a consumer product.
This part of ISO/TS 20282 is intended to be used for testing the
usability and/or accessibility of products when
-it is possible to identify typical contexts of use that
are representative of the use of the product(s),
-it is possible to identify the criteria for the
successful achievement of the users' goal, and
-there are a limited number of goals being tested at the
same time.
While the test method is intended to test consumer products and
products for public use, it can also be used to test other
products, systems, and services with the characteristics described
above. If use of a product involves interaction with inputs,
outputs, or environments that are highly variable and/or complex
with variability or complexity that cannot be categorized in
well-defined subsets,
it is outside the scope as it would not be possible to obtain
reliable results. See Annex A for examples of products and
goals that are within the scope of this part of ISO/TS 20282.
EXAMPLE The method could be applied to an office photocopier, a
website selling books or train tickets, or a legal advice
service.
The method would not be appropriate for a complex ecommerce
website, a word processor, or a bicycle. The method is primarily
intended for use for assessing completed versions of products, but
could also be used for internal purposes during development to
judge, assess, and communicate the usability and/or accessibility
of functional prototype versions.
The results of the summative test method can be used for the
following purposes:
-to estimate the probability of achieving target values of
effectiveness, efficiency, and satisfaction in actual use;
-to publish information about the usability and/or
accessibility of a product;
-to compare the usability and/or accessibility of several
products;
-to compare the results with a usability and/or
accessibility requirements specification;
-to support procurement.
NOTE 2 Annex H lists the information to be included when
specifying the procedure used to test whether the usability and/or
accessibility requirements (Annex G) have been met.
The intended users of this part of ISO/TS 20282 are people with
expertise in the design and management of testing usability and/or
accessibility, working within or on behalf of manufacturers,
suppliers, purchasing organizations, or third parties (such as test
organizations or consumer organizations).