Coffee Machine Usability Test BY: ALAA AMED, JOYCE LI, & EDWIN GUIJOSA

3X3X3Three Users

• Shringar Shamkuar

• Nabila Gunawan

• Vansh Gambhir

Three Tasks

• Move the coffee machine

• Make coffee on the machine

• Set time on the machine clock

Three Data

• Degree of difficulty (Scale 1 to 5)

• Time management (Min; Sec)

• Satisfaction Rate (Scale 1 to 5)

*5 being highest/best on scale*

Shringar Shamkuwa

Move the coffee machine

• Difficulty: 2

• Time: 6.97 sec

• Satisfaction: 4

Make coffee on the machine

• Difficulty: 4

• Time: 5+ min (Over Allowed Time)

• Satisfaction: 3

Set time on the machine clock

• Difficulty: 1

• Time: 37.89 sec

• Satisfaction: 5

User comments

• “kinda heavy, but I do not mind moving it. ”

• “Hard to make coffee without reading the manual. Did not know what goes where.”

• “I would use this coffee machine again now that I know how.”

Nabila Gunawan

Move the coffee machine

• Difficulty: 3

• Time: 8.09 sec

• Satisfaction: 3

Make coffee on the machine

• Difficulty: 2

• Time: 1 min 47.63 sec

• Satisfaction: 3

Set time on the machine clock

• Difficulty: 2

• Time: 22.93 sec

• Satisfaction: 4

User comments

• “The coffee pot does not seem to hold itself together when carrying.”

• “I have never used a coffee machine before so this is new.”

Vansh Gambhir

Moving the coffee machine

• Difficulty: 1

• Time: 7.75

• Satisfaction: 5

Making the coffee:

• Difficulty: 4

• Time: 2 min 28.89 sec

• Satisfaction: 2

*No coffee was made, the user put the water in the wrong place.*

Setting the time:

• Difficulty: 1

• Time: 17.77 sec

• Satisfaction: 5

User Comments:“Why is there so many buttons to set the time? “

Observations• All participants said not wearing glasses did

not affect their performance.

• Participants kept asking why the task was being asked to do.

• Only one person figured out how to set up the time efficiently.

• All participants made several errors on the second tasks .

• The two female users were able to make coffee successfully, unlike the male user who mistakenly put the water in the coffee ground’s place.

Changes• Change the moving task to something a bit

more challenging.

• Be more precise on exactly why we were doing this.

• Give the manual to the participants. (Machine was not new/could not find it)

• Make the user feel more comfortable.

• Set up a measuring scale for the tasks.

CommentsSafety:

• Make the wire retractable

• Find way to lock pot in when to utilize when moving

Function:

• Buttons are easily identified and accessible.

• The water scale is not easy to read. (numbers are transparent)

• Less button clicks to set the clock.