We know very well that our idea is not worth anything unless we implement it. Do you have any method to calculate the true value of your idea? I am asking about your money making ideas...
Watch the competition or similar ideas and see how they're doing. But the real test is to put it live and see for myself if it's a good move or not.
No I don't think there's a way to accurately measure it. As you have already mentioned it yourself, the only way to find out is to implement it and measure from there.
You said it yourself: "idea is not worth anything unless we implement it"... Test it and you will know
it's like corn without the microwave. you wont know the value until you let 'em pop! got to take the risk with ideas