Activity 3.2.1 Case study In recent months your customers have slowly been withdrawing from using your products. The end of year month report identified that one of your largest customers has been purchasing from your competitors and sales are down. You receive raw material from a supplier, you use the raw material from the supplier to make a part that you sell to the customer which is a part of a product that they sell to another business. You believe it is a quality issue but you are not sure. In this instance how would you try to find out why sales are decreasing? Why? Develop a telephone questionnaire in the space provided below