Answer: Prevention cost is used to protect equipments and assets and as such is an investment.
Explanation:
Prevention cost like the name suggests is a cost incurred in the process of keeping a machine or equipment in a working condition to avoid a future breakdown which might lead to a loss in profit for the company. This is why it is referred to as an investment because it is done to prevent the loss of profit due to downtime a breakdow of the machine or equipment would cause.
Failure cost is a true cost because it arises from a loss incurred by the company through production or it capital invested in the business.