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Reducing Errors: The Role of Human Factors in Software DesignCRISTINA NEGRUTLead Usability Specialist | Accuray IncorporatedCo-Chair | ROSSI WG Usability of Error Messages
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Bran Castle, ROMANIA
Source: http://www.hdwallpapersarena.com/
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Desktop Software Applications
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It does not kill my eyes anymore.
Medical physicist's reaction to a re-design of the planning software.
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Goals
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Give you hope that you will see improvements.
Learn to indentify usability problems.
Believe that you have more powerthan you think.
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Sources: http://www.skyhdwallpaper.com/ www.imb.com/developerworks/library/w-berry/
Visuals are only the tip of the usability iceberg Visuals are only the tip of the usability iceberg
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What is Usability?
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Usability is a quality attribute that assesses how easy user interfaces are to use.
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To complicate is simple. In order to complicate, you just need to add something…Everybody is able to complicate. Only a few
can simplify.
- Bruno Munari
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Human Factors Engineering
Application of knowledge about human behavior, abilities, limitations related to the design, to achieve usability.
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UX – User eXperience DesignIncludes Usability
UX encompasses all aspects of end-user’s interactions with the company, it’s services, and its products.
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Source: http://www.nycaviation.com/2015/04/growing-pains-electronic-flight-bag/#.VUzEX_lVhBc
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Goals
1 Learn to indentify usability problems
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5 Quality Attributes
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1. How Steep is the Learning Curve?
Source: http://www.retronaut.com/2012/11/trail-to-the-yukon-goldfields/
1. How Steep is the Learning Curve?
1. How Steep is the Learning Curve?
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2. Efficiency
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Minutes later…Efficiency?
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3. Memorability
20#XXXXXXX — Company Confidential
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4. Satisfaction
The absence of frustration Obvious always wins
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5. Error Prevention
How many errors do occur, how severe are these errors, and how easily can users recover from the errors?
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An error has occur while trying to display an error message.
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Six Content Usability GuidelinesError and Message Dialogs
Radiation Oncology Safety Stakeholder’s Initiative (RO-SSI).
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1. Avoid Technical JargonUser Centered
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2. Clear Language
“You need to deselect the previous selection to select a new dataset.”
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Clear Language
System does not have feelings and needs
“The system wants to shut down.”
Avoid acronyms
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3. Actionable
Users should either perform an action or change their behavior as the result of the message.
Don’t recommend contacting technical support.
Provide a solution
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Message Usability Guidelines
Avoid Technical Jargon Clear Actionable Specific (which ROIs, which File) Concise Clinically Reviewed
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Software Engineer
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Software Engineer
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The “Perfect User” vs Real User
Tendency to create applications for a mythical "perfect user". (William Hudson, UK) Implicitly assume device operated by users with: Visual acuity of an eagle Memory of an elephant Navigation skills of a bat Stamina of a camel Dexterity of a monkey
Design Issues – Root Causes
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Source: http://www.syntagm.co.uk/design/articles/challenges_of_ucd.pdf
‘Mythical Perfect User’
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Goals
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2 Give you hope that you will see improvements
Learn to indentify usability problems
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Using a set of methods and tools, follow a scientific process focusing on real user needs and goals in the context of use.
Usability Eng. Part of the Solution
Usability Engineer
…by day
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User Research – Ethnographic Studies
#http://www.interiorclip.com/interior/1000x667/2013-fabulous-google-office-tel-aviv-20708.html
http://www.fastcodesign.com/3028909/8-of-googles-craziest-offices#1
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- Clinicians have to deal with constant interruptions- Tight schedules- Work with sick patients and concerned families- In a basement with no natural light- Monitoring 3 or 4 computers at the same time
User Research
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Internationalization Implications
Cultural Differences
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Conceptual Design + Requirements
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Paper Mockup
Wireframe
CompTomoTherapy Usabi lity StudyNovember 2007
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A2.a
Detail Design and Usability Testing
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Human Factors Key Standards
Regulatory bodies recognize the importance of usability engineering methodology to produce safe and effective medical devices.
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Goals
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Give you hope that you will see improvements
Learn to indentify usability problems
Believe that you have more powerthan you think
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Balancing Needs
Usability
Business needs(cost, revenue, time to market)
Technical constraints (configuration, maintainability, reliability)
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If you think you are too small to be effective, you have never been in bed
with a mosquito. - Bette Reese
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Collaboration with Vendors
Let the vendors know of uncovered usability strengths and weaknesses.
Make use of the vendor's channels to get customer input:
Don't give up. Need concerted effort.
2. Contact vendor representatives
1. Join one of the ROSSI working groups
Online forums and product feedback forms Users meetings Trade shows
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Even if you are on the right lane you will be run over if you just
sit there. - Will Rogers
