during last years, several times I've encountered projects when the best suitable action in order to ask a user to do something in a workflow was a Flexi task action with just one outcome..
If the customer is using also Nintex Forms and because Outcome is a mandatory field, their following question is always: "Is it possible to autoselect the only option?" and "Is it possible to make it hidden?"
- Add a class to the decision field (in my case "decision")
//NWF$('.decision').hide(); //remove comments if you want to hide the control
With the above script, the option inside the element with "decision" class will be selected, in case you want also to hide it, you can remove the comment on last line so it will be hidden from form..in this case you can also remove the corresponding label and panel (think about the Delegation link) in order to reduce the space of the form, just move the control somewhere in the form, also overlapping some other fixed control (e.g over the logo), just to keep it in the form but without occupying additional space.
Hope this post may help someone and make him/her save some time..