A prototype marketing brochure is a good tool for "testing the waters" with prospective customers.
Easy way to test a new product, service, solution idea
Easy to iterate a concept
Easy to put in front of prospective customers for feedback: test, measure, learn
Customer can become part of the design process ... pencil and paper and eraser
Inexpensive ... time, money, resources
Works for most any idea concept
Flexible "size" (number of pages) although the fewer the better
Can incorporate in the venture business plan, summary
Can use to design and develop a product and/or service based on prospective customer reactions to the product and/or service describe in the prototype brochure
Here's a "pencil sketch" of a marketing brochure template:
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