Final answer:
The common cause of new product failures is the lack of a unique benefit to customers, often due to poor early design decisions. Business failures can also stem from poor management, competition, and shifts in market demand and supply.
Step-by-step explanation:
One common cause of new product failures is that the product fails to offer the customer a unique benefit. This is often a result of poor design decisions made early in the development process, not being able to suit the customers' needs effectively.
Additionally, businesses can fail due to a variety of other reasons such as poor management, non-productive workers, severe competition, or unfortunate shifts in market conditions affecting demand and supply, leading to unfavorable pricing for outputs or rising costs for inputs.