The questions are1. Why should I buy (is there a need)2. What should I buy (what product will meet the need)3. Where should I buy (what source provides the product)4. What is a fair price (is the price of this product worth meeting the need)5. When should I buy (is meeting my need necessary at this point)This mental process is used more often when a customer is actively trying to fill a perceived need. You put your expertise, knowledge, background, and years of experience down in print. About the author Alan Roberts is an entrepreneur based in the UK, US and Hungary.