Create Model for AlarmTrigger
Create new.html.erb for Alarm Trigger

referring back to the _form partial
Change "set_expected_event" to "set_alarm_trigger" 

We changed the naming in line 2 (for some reason the changes are not shown in this file), which was a left-over from scaffolding (copied from the Expected Events). 
In line 14 we deleted the plural in the instance variable.
Delete the form, insert table instead
insert instance variable

we hadn't used an instance variable yet (defined in the controller).
Change Plural to Singular
Comment out redundant routing

That stuff is already included in the resources.