The first of the 3 primary components of Quick-UX, of which I will be discussing in greater depth, is the one of Usability. Put simply, Usability is a measure of how easy something is to use.
In sticking with the primary goals of Quick-UX (quick assessment for summary, directional guidance, and quantitative comparison) the variables constituting the minimal representative subset for Usability are…
- Accessibility,
- Consistency,
- Recognition,
- Navigation, and
- Page Load Time.
Accessibility
Accessibility is the measure of how many differently skilled/abled types of people (including individuals with disabilities) in varying locations (e.g. mobile web) can make use of a given product. There exist many, very thorough, guidelines for determining the degree to which a product adheres to accepted accessibility standards. However, many can be very complex and time-consuming, also requiring the study of a good deal of the underlying code — much of which goes against the goals of the ‘quick’ part of Quick-UX.
I use a robust (and free) proxy for quickly assessing a product’s Accessibility through the use of the Functional Accessibility Evaluator (fae) link. The fae’s resultant scores are averages which, in turn, are normalized to a range from zero to one to represent the value for Quick-UX‘s Accessibility variable.
Consistency
Consistency is a fundamental component of Usability. The less learning a new user has to do to use a product the more usable is that product. Products should not have multiple interface elements, page layouts, or content that are used for the same purposes, but vary depending on how the user got their or where they are currently looking.
For example, if the product/site is in the travel industry and the site often references ‘travel search engines,’ a consistency that can grow confusing (inconsistent) is when the language that describes the same engines varies from instance to instance, from ‘engines’ to ‘tse’s,’ to ‘search travel engines,’ etc.
The determining of the value for the Consistency variable is done through the brief surveying of the product, and assigning a…
- 1 if there are no apparent inconsistencies,
- 0.5 if only minor, non-intrusive inconsistencies are found,
- 0 if there exist inconsistencies on major element(s) or a majority of minor elements. Inconsistencies on major elements lead to immediate confusion and second guessing information being conveyed.
Recognition
The measure of the Recognition and intuitiveness of a product conveys how easily an average user of a product can immediately grasp how to use it. When evaluating this Usability variable remember… YOU are NOT an AVERAGE user. The Recognition variable is assessed from the perspective of an average user and is assigned a value of…
- 1 if the interface and product, in general, feels familiar and is easy to use,
- 0.5 if some poking, finesse, and interaction are required before the user will be able to gather his or her bearings in the use of the product,
- 0 if the average user will have clear difficulty understanding (1) how to use the product and (2) what the product is trying to communicate.
Navigation
Evaluating the Navigation variable as it relates to Usability (and Quick-UX) also includes, in addition to site navigation, the review of the site’s flow, transitions, interactivity, and clear communication of progress. If a user can’t figure out how to get from point A to point B, or is not presented with clear information as to how he or she got to point C or that there remain points D through Z to still travel, the overall Usability of the product can be sorely damaged.
The Navigation variable is assigned the value of…
- 1 if the product presents a straightforward decision process, leveraging animated transitions when appropriate, providing clear feedback, and communicating progress within each multi-stage task,
- 0.5 if the two following conditions are met:
- occasional, but easily correctable, mis-steps in accomplishing tasks and/or completing processes occur, and
- there exists a visible current progress indicator for all multi-step tasks,
- 0 if any of the following scenarios occurs with frequency:
- resultant Interaction or other resultant event occurs contrary to the desired decision path,
- surprised by result of interaction, or
- no communication of progress, flow, or navigation.
Page Load Time
There are some products out there (Twitter comes to mind) that could not possibly have an easier to use interface coupled with a simpler purpose (to say what you are doing) that are frequently rendered barely, or completely, unusable due to entirely unacceptable product responsiveness.
A company can have the best product around, but if the pages are too sluggish, they can achieve a real pain-point in the overall user experience, rendering a product unusable.
Assessing the Page Load Time variable requires very little of your time. However, I do recommend you average at least a few data points over the course of a day, or days, to make sure you have an accurate sense of the normal product responsiveness.
- If the product typically loads the information promptly (within acceptable expectations) then the Page Load Time variable is assigned the value of 1.
- If the product exhibits the occasional, inconsistent delay, use 0.5.
- And, if the product (like Twitter, at the current moment) has frequent and long delays (including outages) the value for Page Load Time variable is 0.
Usability. Quickly. Done.
The quantitative assessment of these variables are structured to provide a quick and painless method of evaluation to form a summary, directional guidance, and/or values that facilitate inter-product comparisons through the answering of the basic question…
Can I use it?
When answers to the above question of Usability is combined with…
… the result is a product’s overall, repeatable, quantitative assessment of User eXperience.
Enjoy! (and discuss)
Jeremy Horn
The Product Guy
March 31, 2008 at 11:40 am
[...] Can I use it? Evaluating Usability through Quick-UX. [...]
April 7, 2008 at 6:37 am
[...] Can I use it? Evaluating Usability through Quick-UX. [...]
April 14, 2008 at 4:02 pm
[...] Can I use it? Evaluating Usability through Quick-UX. [...]
April 29, 2008 at 2:59 pm
[...] twhirl, a desktop Twitter client, was recently upgraded. Within twhirl’s upgrade were some needed, and fully appreciated, improvements to the User eXperience — most notably, along the lines of Usability. [...]
October 13, 2008 at 11:01 pm
[...] and intuitiveness present within a product, is a key component in determining the overall Usability of a product. For example, for an air travel website to be usable, it should have some basic [...]
October 21, 2008 at 9:27 pm
[...] and intuitiveness present within a product, is a key component in determining the overall Usability of a product. For an air travel website to be usable, it should have some basic, recognizable, [...]
October 27, 2008 at 2:59 pm
[...] and intuitiveness present within a product, is a key component in determining the overall Usability of a product. For an air travel website to be usable, it should have some basic, recognizable, [...]
November 3, 2008 at 8:06 am
[...] and intuitiveness present within a product, is a key component in determining the overall Usability of a product. For an air travel website to be usable, it should have some basic, recognizable, [...]
November 9, 2008 at 7:03 pm
[...] or poor consistency, damages the basic Usability of the product. Consistency, when done well, bolsters the User Experience, and reduces the learning [...]
November 17, 2008 at 10:18 am
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Can I use it?" the sub-category of Consistency often does not get the attention it [...]
November 24, 2008 at 6:24 am
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Can I use it?" the sub-category of Consistency often does not get the attention it [...]
December 1, 2008 at 9:29 pm
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Can I use it?" the sub-category of Consistency often does not get the attention it [...]
December 8, 2008 at 9:01 pm
[...] a well planned Layout, beyond basic Usability, a web product can portray itself as a welcoming and pleasing — Desirable — place to [...]
August 24, 2009 at 12:08 pm
[...] entire product, the question “Do I want to use it?” represents only 1 of the 3 core components (Usability, Usefulness, Desirability) of a Quick-UX evaluation – a sure-fire, rapid way to obtain concrete [...]
August 24, 2009 at 12:08 pm
[...] entire product, the question “Do I want to use it?” represents only 1 of the 3 core components (Usability, Usefulness, Desirability) of a Quick-UX evaluation – a rapid way to obtain concrete and [...]
September 7, 2009 at 9:17 am
[...] entire product, the question “Do I want to use it?” represents only 1 of the 3 core components (Usability, Usefulness, Desirability) of a Quick-UX evaluation – a rapid way to obtain concrete and [...]
September 21, 2009 at 6:03 pm
[...] entire product, the question “Do I want to use it?” represents only 1 of the 3 core components (Usability, Usefulness, Desirability) of a Quick-UX evaluation – a rapid way to obtain concrete and [...]
September 21, 2009 at 6:18 pm
[...] minor point is that while it is good manners (and Usability) to clearly label a link that points to a PDF file, this could be done in a more focused [...]
January 11, 2010 at 1:14 am
[...] answering the question of Usability, "Can I use it?" the sub-category of Page Load plays an instrumental part. Page Load, [...]
January 17, 2010 at 9:42 pm
[...] answering the question of Usability, "Can I use it?" the sub-category of Page Load plays an instrumental role. Page Load, [...]
January 25, 2010 at 3:11 pm
[...] answering the question of Usability, "Can I use it?" the sub-category of Page Load plays an instrumental role. Page Load, [...]
February 8, 2010 at 10:19 am
[...] answering the question of Usability, "Can I use it?" the sub-category of Page Load plays an instrumental role. Page Load, [...]
February 15, 2010 at 11:55 am
[...] answering the question of Usability, "Can I use it?" the sub-category of Page Load plays an instrumental role. Page Load, [...]
July 5, 2010 at 1:33 pm
[...] Can I use it? (Usability) [...]
July 12, 2010 at 11:55 am
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Should I use it?" the sub-category of Accessibility represents one of the more complex [...]
July 26, 2010 at 11:10 am
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Should I use it?" the sub-category of Accessibility represents one of the more complex [...]
August 2, 2010 at 10:51 am
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Should I use it?" the sub-category of Accessibility represents one of the more complex [...]
August 9, 2010 at 6:26 pm
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Should I use it?" the sub-category of Accessibility represents one of the more complex [...]
August 22, 2010 at 9:36 pm
[...] and quantifiable assessment of a product’s User Experience (UX). In answering the question of Usability, "Should I use it?" the sub-category of Accessibility represents one of the more complex [...]