The sixth concern to evaluate before determining if you should move forward with your project is if your item is consumable. By that, we do not mean that it is something to eat. We mean that it is something that gets used up or needs to be purchased repeatedly. If your invention is something that is disposable, or is a one or two time use item, the same people will buy your product frequently. You can multiply the number of people who are likely to buy your product by the number of times they will need to replace it within a certain time period in order to estimate the market size. Manufacturers love products that consumers will buy again and again.

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