Describe the major types of buying situations

What will be an ideal response?

There are three major types of buying situations.
In a straight rebuy, the buyer reorders something without any modifications. It is usually handled on a routine basis by the purchasing department. To keep the business, "in" suppliers try to maintain product and service quality. "Out" suppliers try to find new ways to add value or exploit dissatisfaction so that the buyer will consider them.
In a modified rebuy, the buyer wants to modify product specifications, prices, terms, or suppliers. The "in" suppliers may become nervous and feel pressured to put their best foot forward to protect an account. "Out" suppliers may see the modified rebuy situation as an opportunity to make a better offer and gain new business.
A company buying a product or service for the first time faces a new task situation. In such cases, the greater the cost or risk, the larger the number of decision participants and the greater the company's efforts to collect information. The new task situation is the marketer's greatest opportunity and challenge. The marketer not only tries to reach as many key buying influences as possible but also provides help and information. The buyer makes the fewest decisions in the straight rebuy and the most in the new task decision.