Have you ever wondered why technology is so expensive? Why does the technology repairman charge more per hour than what many attorneys charge? Why does it feel like you get nickeled and dimed to death with technology costs?
A non-linear expenditure in relation to production is referred to as a cost driver. The underlying reason for driving costs in either a positive or negative direction over a production run or within an operating time period is referred to as a cost driver.
The textbook answer defines cost drivers as those factors that determine the overall cost of operations. As an example, in manufacturing the cost drivers may be processing time or number of steps to produce the product. In service, the cost drivers could be the actual ratio of billable to non-billable time.