A tool designed for determining the incremental cost of producing one more unit assesses only variable costs, such as raw materials and direct labor, excluding fixed costs like rent or salaries. For instance, if producing 100 widgets costs $500 in variable expenses and producing 101 widgets raises that to $505, the incremental cost for the 101st widget is $5.
This type of cost analysis provides key insights for informed decision-making, particularly regarding pricing strategies, production volume, and make-or-buy choices. Historically, its development coincided with the rise of industrial manufacturing, providing businesses with a method for optimizing output in increasingly complex production environments. It remains highly relevant in contemporary business for understanding profitability drivers at various output levels.