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- When he tried to adjust the Air Conditioner setting, the soft-keyboard blocked the screen. He couldn't see where the cursor was or whether the backspace was actually deleting the old value. To solve this, we will need to move the widget up, above the soft-keyboard.
- After schedule a transaction from the Reserves tab, the screen returned to the device tree view. It's not obvious how to view the just scheduled transaction. To solve this, we can add more information in the Toast dialog.
- He was pressing on the device name itself, while trying to bring up the device settings page. Currently using the Edit Setting button is the only way to get to the page. We should consider supporting context menus as well, which will pop up when user presses a device name.
The second user is a female home owner. She is a typical user among the targeted user population of the application. She didn't know the details of the application before the test. She was verbally introduced the purpose of the application first, and given about ten minutes to play around it. After that we asked her to do the following specific tasks:
- Find today's total energy consumption
- Find which device used most for the day
- Compare today's usage with the past 30 days
- Adjust the setpoint of the air conditioner
- Sell power from a specific device at a given future time
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The test went well in general, but did expose following problems:
- Data shown for the Daily tab actually contains hourly data. Today's total consumption, for example, can't be found in the Daily tab. To fix this, we can make today's total data shown on the chart in text. We should also consider to add help at the bottom of the screen, similar to status bar of windows.
- Total is mistakenly considered the sum of all selected devices. This is not intended,
- Back button doesn't work, and no undo is supported. This is a missing function and we will add this in the future.
- No obvious indication that user can swipe the chart to scroll. We plan to added clickable buttons at the left and right ends of the chart, which user can click to scroll the chart. Swiping is an efficiency feature for users more familiar to the application.
- Besides the issues above, the problems found in the first user test also found in this test.
Reflection
Risk Assessment
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