CHAPTER I
THEORY
1.1 ABC COSTING
ABC costing is created in response to simple costing system or also known as peanut
butter costing system. Managers used simple costing sytem to allocate overhead costs
broadly in an easy, inexpensive and reasonably accurate way. However, as product as well as
services diversity and indirect cost increased, broad averaging lead to inaccurate costs which
lead to the development of ABC costing system.
One of the best tools for refining a costing system is activity based costing. Activity
based costing (ABC) refines a costing system by identifying individual activities as the
fundamental cost objects. An activity is an event, task, or unit of work with a specified
purpose – for example, designing products, setting up machines, operating machines and
distributing products. More informally, activities like verbs; they are things that a firm does.
To help make strategic decisions, ABC systems identify activities in all functions of the
value chain, calculate costs of individual activities and assign cost to cost objects such as
products and services on the basis of the mix of activities needed to produce each product or
service.
Managers choose the level of detail to use in a costing system by evaluating the
expected costs of the system against the expected benefits that result from better decisions.
Here are some telltale signs of when an activity based costing (ABC) system is likely to
provide the most benefits:
• Significant amounts of indirect costs are allocated using only one or two cost pools.
• All or most indirect costs are identified as output unit level costs.
• Products or services needs diverse demands on resources because of differences in
volume, process steps, batch size or complexity.
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