It is easy to become locked into a vision. When a budding entrepreneur is "Does anyone want what your offering?" or "Who are your customers?" it can be a blow. They have a vision and can find it difficult when others don't share the same. But these questions are fundamental to making a product or service successful. So...

• What is the problem being solved by this product/service?
• Does the product offer a vision?
• How will you make money (e.g. repeated sales, rental?)
• What are the critical success factors?
• What are the short- and long-term objectives for the product?
• Is there a brand value to be communicated?
• Who are your customers?
• Are they existing customers or potential customers?
• Do your customers form a particular demographic (age, where they live, jobs they do )?
• Who are your competitors?
• Why would anyone want this?