This research clarifies the changes of conventional issues influenced by Activity-Based Costing (ABC), and suggests a future direction of developing overhead costing methods, analyzing the characteristics of traditional methods.
First, the primary issues of traditional methods, ABC solved, is that the distortion of product cost by using volume-related cost drivers has been overcome, because ABC sets up appropriate cost driver with cost pool based on causal relationship. Second, ABC cannot find a key to the settlement of the issues of traditional methods in the situation that variable cost is transformed into fixed cost among cost departments. Third, it is the main new issue that the relation between ABC and cost accounting system is not well-defined.
Therefore, it is necessary to re-investigate overhead costing methods, considering various situations; when transforming variable cost to fixed cost occurs, etc.
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