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4. HEP displays the previous view with the empty day fields as well as other
previously correctly inserted fields
1a. Nothing has been selected in the start dropdown box
2. An alert box with the message “You have to select start time for a split tariff” is
displayed
3. End-user clicks the “OK” button on the alert box
4. HEP displays the previous view with the empty start fields as well as other
previously correctly inserted fields
1a. Nothing has been selected in the end dropdown box
2. An alert box with the message “You have to select end time for a split tariff” is
displayed
3. End-user clicks the “OK” button on the alert box
4. HEP displays the previous view with the empty end fields as well as other
previously correctly inserted fields
5.3.3 View existing usage
When the end-user wishes to view existing consumption usage based on chosen appliances and time
period the following steps in this use case need to be taken. This will give the information regarding
usage in kWh in both written and graphical format along with a list of appliances chosen. If estimated
cost information is also desired use case 5.3.2 needs to be completed in addition. This use case can be
performed at any time after an appliance has been chosen or added.
Name
Actors
Trigger
Preconditions
Post conditions
Success Scenario
Alternative Flows
View existing usage
End-user
End-user clicks the “Existing energy use” button
End-user elects to view the existing energy usage, use case 5.3.1 is completed
The existing energy usage is displayed
1. End-user clicks the “Existing energy use” button
2. HEP displays existing energy use in a graph and in written format
2a. Use case 5.1.2 has been completed
2. HEP displays existing energy use in a graph and in written format, as well as the
existing estimated cost
2a. End-user wishes to see information about estimated cost
2. End-user clicks on “Appliance List” button
3. End-user completes use case 5.3.2
4. End-user clicks the “Existing energy use” button
5. HEP displays existing energy use in a graph and in written format, as well as the
existing estimated cost
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