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Cooper and Kaplan

Decent Essays

Activity-Based Systems: Measuring the Costs of Resource Usage
Robin Cooper and Robert S. Kaplan
Robin Cooper is a Professor at the Claremont Graduate School and Robert S. Kaplan is a Professor at the Harvard Business School.

This paper describes the conceptual basis for the design and use of newly emerging activity-based cost (ABC) systems. TVaditional cost systems use volume-driven allocation bases, such as direct labor dollars, machine hours, and sales dollars, to assign organizational expenses to individual products and customers. But many ofthe resource demands by individual products and customers are not proportional to the volume of units produced or sold.^ Thus, conventional systems do not measure accurately the costs of …show more content…

Assume that each employee, working at practical capacity, can process 125 purchase orders per month, leading to an estimated cost of $20 for processing each purchase order.® Thus, the organization, each month, spends $25,000. This expenditure provides a capability to process up to 1,250 purchase orders [the activity availability] during the month. During any particular month, the department may be asked to process fewer purchase orders, say only 1,O(X). At an estimated cost of $20 /purchase order, the ABC system would assign $20,000 of expenses to the parts and materials ordered by the purchasing department that month. The remaining $5,000 of monthly operating expenses represents the cost of unused capacity in the purchase order processing activity. This example shows why companies need two different reporting systems. The periodic financial statements provide information on the cost of activities supplied each period (the $25,000 monthly expense in the purchasing department); and the activity-based cost system provides information on the quantity (1,000 purchase orders) and the estimated cost ($20,000) of activities actually used in a period. The difference ($5,000) between the cost of activities supplied ($25,000) and the cost of activities used ($20,000) equals the cost of unused capacity (or capacity shortage) during the period. And this difference is measured for each organizational activity, defined by

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