What is the proposed idea/solution?
When a user is completing a form there should be a restriction added that if the end date is before the start date it can't be submitted.
How does is solve the user problems?
It will ensure that those filling out the form are inputting the correct information. I myself have done so on forms I have previously filled out.
Who is the target audience?
Everyone who is looking to create forms for any purpose. Be it for personal or business.