Chapter 5 – Activity-Based Costing and Customer Profitability Analysis
5-5 Implementing Time-Driven Activity-Based Costing at a Medium-Sized Electronics
Company
This article revisits the company described in reading 5-4, which has now adopted a traditional ABC system.
In this article the authors examine how a time-driven ABC (TDABC) system might overcome some of the
drawbacks of the traditional ABC system while provide more insightful information about the demand that
products put on the available resources.
Discussion Questions
1. What are the goals of an ABC system?
At one level, the goal of an ABC system is to allocate indirect (support) costs in such a way that the
resulting cost information reflects more accurately the resource demands/resource consumption of an
and ABC system is to provide better information for management decision making.
2. What are the potential drawbacks of a traditional ABC system?
The issues faced by XYZ are representative of a major drawback of a traditional ABC system. First is
the complexity of the implementation. A traditional ABC system is very data intensive and collecting
and analyzing the data can prove to be overwhelming for a small to medium sized firm. Additionally,
there is the difficulty in keeping all the data current in order for management to be able to rely on the
3. What benefits does a TDABC system offer over a traditional ABC system?
Advocates of time-driven activity-based costing maintain that this system is an improvement on
traditional ABC systems in the following respects:
TDABC eliminates the need for the time consuming, subjective, interview-and-survey process to
define resource pools. Rather, TDABC relies only on simple time estimates that, for example, can be
established based on direct observation of processes.
TDABC accurately accounts for the complexities of business transactions (such as variations of
operational transactions) by using time equations. These equations more accurately reflect the time
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Education.