ABC WHITE PAPER
The Essence of ABC - The OffTech Approach
by James Dunkley & Dr. David Payne
ABC is a management tool.
Above all else, ACTIVITY BASED COSTING is a management tool. In itself, ABC can do nothing.
ABC can, however, help your managers with their decision-making processes. The real value of ABC depends on the
use made of it by managers.
Resources necessarily involve costs because everything (including human beings) eventually wears out. Costs can
include:
Cash spent on running an operation;
The maintenance of a resource base.
The costs of maintaining plant, buildings, personnel and other assets are often expressed by accountants as
depreciation
.
Accounting techniques attempt to quantify costs by including many subjective opinions, such as the bases of depreciation
and/or inventory valuation. Accounting methods are often based on legal or Tax Office requirements rather than the
actual costs of running a business. As well, some costs might be expended as investment for the future and are
generally not included in an accounting approach to cost estimates.
Many real costs are of a 'direct' nature, for example, materials and some specific overhead expenses. In the past,
methods adopted for allocating other costs, which might include Manufacturing, Distribution, Marketing and
Administration costs, have created controversy and argument.
ACTIVITY BASED COSTING attempts to ensure that every cent spent by an organisation, including direct and overhead
costs, is allocated to the products or services in the most equitable way in order to realistically identify the cost to the
organisation of delivering those products or services.
In essence, ABC works like this:
The ABC method identifies a group of 'cost pools' or 'activities' within your organisation through which a product
or service must pass before it is delivered to the customer.
The total cost of operating each of the 'activities' for a year must be estimated.
The total number of hours that will be spent on each of the 'activities' in a year must be estimated.
Based on these two estimates, a 'cost driver' for each of the 'activities' can be calculated.
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For example, if it is estimated that a press will cost $250,000 to operate over a year, including the direct and
overhead costs allocated to that press, and it is estimated that 25,000 products will pass through that press
during the year, an appropriate 'cost driver' would be $10/product.
Alternatively, if it is estimated that each product will take 10 minutes to pass through the press activity, an
alternative 'cost driver' for the press would be $10/product x 6 products/hr, that is, $60/hr to run the press.