In SS3 once you made your model and you need to make adjustment in the design file it slow down production even thou the models is off it still take time. The best way is to save your modified templates and delete the models and the regenerate the models. If there is any easier way please let me know. I hope this gets fix with SS4
If you are going to be making several changes and don't want to wait for the corridor to process with each change you can deactivate the rule so the corridor will not process.
Once the changes are made you can toggle the rule back on and then manually process the corridor so it will reflect the changes made.