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The Pros and Cons of Activity-Based Costing (ABC)
Activity-based costing, rooted from the 1970ies, were a novel way of assigning costs more accurately to cost objects. As R. Cooper and R. S. Kaplan brought notice to these concepts, they stressed its main innovation: assigning the direct and indirect costs of each activity to products based on the resources they consume. In contrast, the traditional costing system assigned overheads in proportion to an activity’s direct costs1, which would oftentimes distort the real costs incurred by a product. The reason is that if product B needs a lot more engineer’s time to be developed, it should have higher costs than product A needing less time. This example is taken from the article1 “Idea: Activity-based costing” by the Economist, which sheds light on the ABC method’s merits, but also mentions that a lot of firms were reluctant to implement this system. The article goes on to explain that the ABC system had a strong start, but soon fell into a period of disrepute, as Mr. Kaplan has admitted. Since the ABC system is generally accepted and its advantages are taught in business schools worldwide, this article inspired me to briefly discuss reasons as to why or why not a firm should implement such a system.
First and foremost, as mentioned, activity-based costing is the basis for a more accurate cost allocation, especially when the rate of overhead costs is high or when products consume different proportions of overhead rates. A more careful allocation should then lead to better business decisions. However, it is possible that some activity-based costs are irrelevant for decision-making scenarios, since this system does not conform to accounting standards and may therefore not be used for decisions regarding this area. This means that interpreting ABC information along with account data will require some expertise or else it

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