Test, Learn, Test, Learn, Repeat
Apply the design process to your project, no matter the time, budget, or resources you have.
Would a company of any size put out a product without testing? Would they invest a significant amount of resources, time, people, raw materials, etc. to produce something they weren't sure was going to work? So why would you put out a permanent design in a public space if you didn't have any idea if it would work?