I have developed and successfully sold many of my ideas in the last 15 years. There is a process i follow that gives me great results.

When validating an idea, You need as many opinions as possible from people with different backgrounds. It can't be answered by a single expert.

First you need to protect your idea (if possible) and a working prototype (depending on the product).

I agree that surveys are great to quickly evaluate interest.

Next step is to start a Crowdfunding campaign and see if people are actually willing to pay for it.

While collecting funds for developing you also collect ideas for improvement. Double win.

Give me a quick call so i can tell you the exact process i am taking every time i come up with new idea.