Introduction

On Monday, December 9th, a usability study was conducted at the CPRF with the resident Shari, who has been our client.  For the usability study, we were trying to inform Shari how to use the system, as well as to test the system’s performance when trying to her control her television, DVD player, CD player, and Roku streaming device.

Training and Procedure

Although the Universal Wheelchair System is rather easy to use, we first went through a short training session for Shari to help her understand how to use the system.  We instructed her to make sure the red light was blinking on the Bluetooth shield inside the box, and then turn on the Android app.  When the app is turned on, she must then wait until the light glowed solid to ensure that the app and the Arduino were properly connected.

To consider the product a success, we expected it to properly control each of Shari’s four infrared controlled devices.  We would consider controlling only a portion of these devices as a partial success.  Failure would be if the device failed to control any of the four devices.

When testing the system at Shari’s residence, the first step was to determine the proper location for the box to be placed, so that we maintained proper line of sight between the infrared lights and the devices.

Results

The device failed to control her television as it was expected to do.  This issue will have to go through a troubleshooting process because when it was tested by an infrared receiver attached to an oscilloscope the signal received from our system very closely resembled that received from the television’s remote.

The rest of the devices were successfully controlled by the Universal Wheelchair System, with the client’s input detailed in the following User Survey.

User Survey

Q)        Do you find the device to be easy to use?

A)        Yes

 

Q)        Is it easy to press the button only the desired button on the phone application?

A)        Yes, but I would prefer the buttons to be slightly larger to make them easier to access.

 

Q)        Does the device successfully control all of the television functions that you would like it to?

A)        No

 

Q)        Are there any television remote commands that you would like to see added to the device?  If so, what are they?

A)        No

 

Q)        On a scale of 1-10 (with 10 being the best), how would you rate the device’s ability as a television remote control?

A)        1

 

 

Q)        Does the device successfully control all of the DVD player functions that you would like it to?

A)        Yes

 

Q)        Are there any DVD player remote commands that you would like to see added to the device?  If so, what are they?

A)        I would like to see a record button added to the app because my DVD can record live TV to a DVD.

Q)        On a scale of 1-10 (with 10 being the best), how would you rate the device’s ability as a DVD player remote control?

A)        9

 

Q)        Does the device successfully control all of the CD player functions that you would like it to?

A)        Yes

 

Q)        Are there any CD player remote commands that you would like to see added to the device?  If so, what are they?

A)        Yes, I would like to see radio tuner buttons added to the app.

 

Q)        On a scale of 1-10 (with 10 being the best), how would you rate the device’s ability as a CD player remote control?

A)        8

 

Q)        Does the device successfully control all of the Roku streaming device functions that you would like it to?

A)        Yes

 

 

Q)        Are there any Roku streaming device remote commands that you would like to see added to the device?  If so, what are they?

A)        I do not have any remote commands to add, but I would like to see the buttons on the app to look more like the buttons on the actual remote.  Instead of having buttons say “Back” I would like to see a picture of a backward arrow, and instead of the button saying “Power”, I would like to see a picture of a House, as it is on the actual remote.

 

Q)        On a scale of 1-10 (with 10 being the best), how would you rate the device’s ability as a Roku remote control?

A)        8

 

Q)        Are there any other changes that you would like to see made to the Universal Wheelchair System?

A)        I would like it if, when you swiped the screen to the next remote, it would move all the way to the next remote screen and lock there, instead of only partially sliding between screens.

 

Q)        Overall, how would you rate the performance of the Universal Wheelchair System?

A)        10, it is really cool.

Reflection

The consumer’s input gave us a very good idea of how the system could be improved.  With the inability of the device to control the television, that would be the obvious starting point for improvements to be made.  The time delay may be slightly off on the infrared signals, causing the device to work incorrectly; however, this seems odd considering the time delay seemed very similar when viewed on an oscilloscope.

After the device was fixed to properly control the television, the next step would be to improve the app’s interface.  One of the most important changes that could be made would be to cause the app to slide and lock onto the next remote menu, instead of sliding where it could be possible to see parts of two separate remote menus.  Also, the ability to rotate the app display was something else that the client requested, saying that it would make the buttons slightly larger and, therefore, more accessible.  Finally, the display of the Roku remote should be changed to more closely imitate the real remote.