On the determinants of measurement error in time-driven costing

E. Cardinaels, E. Labro

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Although time estimates are used extensively for costing purposes, they are prone to measurement error. In an experimental setting, we research how measurement error in time estimates varies with: (1) the level of aggregation in the definition of costing system activities (aggregated or disaggregated); (2) task order (the extent to which the activities that require time estimates present themselves systematically or mixed); and (3) when notice is given that time estimates will be required (in advance or after the fact), that is, whether participants know that time estimates will be required before they perform the activities. We also test on response mode (estimates in percentages or absolute time units). The results suggest an important trade-off between the level of aggregation and measurement error: disaggregation of activities leads to higher measurement error. Also, advance notification reduces measurement error, especially in settings with aggregated activities or mixed tasks. Finally, we find a strong overestimation bias when participants provide time estimates in minutes, which may be problematic for Time-Driven Activity-Based Costing that advocates the use of estimates in minutes. These results are relevant to accountants and decision makers who want to assess and control the measurement error in their current costing system and to professionals in related areas that make use of time estimates (e.g. billing, tendering).
Original languageEnglish
Pages (from-to)735-756
JournalThe Accounting Review
Volume83
Issue number3
Publication statusPublished - 2008

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Costing
Measurement error
Accountants
Activity systems
Decision maker
Trade-offs
Tendering
Disaggregation
Activity-based costing

Cite this

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title = "On the determinants of measurement error in time-driven costing",
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On the determinants of measurement error in time-driven costing. / Cardinaels, E.; Labro, E.

In: The Accounting Review, Vol. 83, No. 3, 2008, p. 735-756.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - On the determinants of measurement error in time-driven costing

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AU - Labro, E.

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AB - Although time estimates are used extensively for costing purposes, they are prone to measurement error. In an experimental setting, we research how measurement error in time estimates varies with: (1) the level of aggregation in the definition of costing system activities (aggregated or disaggregated); (2) task order (the extent to which the activities that require time estimates present themselves systematically or mixed); and (3) when notice is given that time estimates will be required (in advance or after the fact), that is, whether participants know that time estimates will be required before they perform the activities. We also test on response mode (estimates in percentages or absolute time units). The results suggest an important trade-off between the level of aggregation and measurement error: disaggregation of activities leads to higher measurement error. Also, advance notification reduces measurement error, especially in settings with aggregated activities or mixed tasks. Finally, we find a strong overestimation bias when participants provide time estimates in minutes, which may be problematic for Time-Driven Activity-Based Costing that advocates the use of estimates in minutes. These results are relevant to accountants and decision makers who want to assess and control the measurement error in their current costing system and to professionals in related areas that make use of time estimates (e.g. billing, tendering).

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