It is the responsibility of the roaster to select the right green bean to be roasted. Since there are hundreds of grades of coffee from each origin it is best for him to understand what price and quality that the company wants to represent. Some beans are smaller and under developed so they are cheaper and do not offer the full rich taste that a large and more developed bean may have to offer. Some beans are deformed or are just partial beans which will end up in a lower quality cup of coffee. The higher the quality of bean the better the cup of coffee will taste.