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The user feedback from round 2 gave us additional ideas about modifications we could make to future iterations of our prototype.

  • We made several efforts to clarify the function of the "grid" view (for instance, by providing a snippet of data from the view on the tab itself, and by sending users there from the "storage" view when they pressed the "sell power" button). But despite these efforts, most of our users still did not understand the meaning or function of the "grid" view. It may be necessary to change the name of this tab to provide better information scent.
  • The naming of the "device tree" and "device list" views also seemed unclear to users. Again, changing these names could provide better information scent for sorting in the list view, and for viewing by group in the tree view.
  • It may be useful to show a warning before leaving a page without saving, as suggested by user 4's failure to save his changes to device settings.
  • We hoped that users would find shortcuts for checking/unchecking boxes in the tree view--for instance, by unchecking the "all devices" button to deselect all of the boxes. Most users did not use such shortcuts. Further, these shortcuts are not possible in the list view. "Select all" and "deselect all" buttons would help improve the efficiency of the checkboxes.
  • Most users did not pay attention to the snippets of data shown on each top tab. We hoped that this data would improve both learnability (by providing an example of the data available in the view) and efficiency (by reducing the need to switch tabs). While we still feel that these snippets are useful, we may need to make them more prominent in order for users to notice them.
  • clearer labeling for "grid" tab
  • clearer labeling for tree vs. list--better information scent
  • warnings when leaving a page without saving
  • check/uncheck all
  • greater visibility of tab shortcuts

 

Round 1

Round 2

Device tree tab selected
Usage tab selected




Figure 1.1: Daily view


Figure 1.2: Yearly view

In round 2 we added a "sell power" button to each device.




Figure 2.1: Storage view

The image above shows the storage view in round 1, before the "sell power" button was added for each device in the table.


Figure 2.2: Storage device table vs usage device table in round 2

The image above shows the device tables for "storage" (on the bottom) view and "usage" view (the top table), illustrating the similarity between the two tables. 

Transaction scheduling




Figure 3.1: Transaction scheduling 1


Figure 3.2 Transaction scheduling 2

Monthly view







Figure 4.1: Monthly view 1


Figure 4.2: Monthly view 2

Other

Round 1: setpoint and transaction scheduling

Round 2: new graph specific features added before round 2


Figure 5.1.1: Setpoint


Figure 5.1.2: Scheduling transactions


Figure 5.2.1:


Figure 5.2.2:


Figure 5.2.3:


Figure 5.2.4:

The images above show the graph changes we made for round 2.