Time-Driven Activity-Based Costing (TDABC): An Initial Appraisal through a Longitudinal Case Study

Abstract

TDABC is presented by its “inventors”, R. Kaplan and S. Anderson as a new method. Their aim is to respond to the criticism directed at the ABC method, mainly regarding the cost and complexity of implementing and maintaining it. Our study shows that, while TDABC offers a partial solution to these issues, it still has some inherent weaknesses. Apart from the hesitation as to whether to use standard costs or actual costs, the measurement of time, which forms the basis of the method, also appears problematic. Homogeneity and maintaining it over time have not been given much consideration either, in spite of their importance for obtaining reliable costs. There is nothing new about calculating the cost of capacity and the deviation revealed by TDABC is only a deviation in business volumes. The quality of the data processing applications remains an essential factor in alleviating the complexity of the method. When it comes down to it, the real purpose of TDABC could be to monitor labour time.

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