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Original Article
Analysis of Cost and Efficiency of a Medical Nursing Unit Using Time-Driven Activity-Based Costing
Ji Young Lim, Mi Ja Kim, Chang Gi Park
Journal of Korean Academy of Nursing 2011;41(4):500-509.
DOI: https://doi.org/10.4040/jkan.2011.41.4.500
Published online: August 31, 2011

1Associate Professor, Department of Nursing, Inha University, Incheon, Korea.

2Professor, College of Nursing, University of Illinois at Chicago, Chicago, USA.

3Senior Health Economist, College of Nursing, University of Illinois at Chicago, Chicago, USA.

Address reprint requests to: Lim, Ji Young. Department of Nursing, Inha University, 253 Younghyun-dong, Nam-gu, Incheon 402-751, Korea. Tel: +82-32-860-8210, Fax: +82-32-874-5880, lim20712@inha.ac.kr
• Received: August 11, 2010   • Accepted: August 4, 2011

© 2011 Korean Society of Nursing Science

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  • Purpose
    Time-driven activity-based costing was applied to analyze the nursing activity cost and efficiency of a medical unit.
  • Methods
    Data were collected at a medical unit of a general hospital. Nursing activities were measured using a nursing activities inventory and classified as 6 domains using Easley-Storfjell Instrument. Descriptive statistics were used to identify general characteristics of the unit, nursing activities and activity time, and stochastic frontier model was adopted to estimate true activity time.
  • Results
    The average efficiency of the medical unit using theoretical resource capacity was 77%, however the efficiency using practical resource capacity was 96%. According to these results, the portion of non-added value time was estimated 23% and 4% each. The sums of total nursing activity costs were estimated 109,860,977 won in traditional activity-based costing and 84,427,126 won in time-driven activity-based costing. The difference in the two cost calculating methods was 25,433,851 won.
  • Conclusion
    These results indicate that the time-driven activity-based costing provides useful and more realistic information about the efficiency of unit operation compared to traditional activity-based costing. So time-driven activity-based costing is recommended as a performance evaluation framework for nursing departments based on cost management.
  • Keywords: Costs and cost analysis; Patients' rooms; Efficiency
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Table 1
Costs Using Traditional Activity-Based Costing
jkan-41-500-i001.jpg

*assigned cost/activity quantity.

Table 2
Costs and Efficiency Using Time-Driven Activity-Based Costing
jkan-41-500-i002.jpg

*unit time X activity quantity; †cost driver rate X activity quantity.

Figure & Data

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        Analysis of Cost and Efficiency of a Medical Nursing Unit Using Time-Driven Activity-Based Costing
        J Korean Acad Nurs. 2011;41(4):500-509.   Published online August 31, 2011
        DOI: https://doi.org/10.4040/jkan.2011.41.4.500
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      Analysis of Cost and Efficiency of a Medical Nursing Unit Using Time-Driven Activity-Based Costing
      Analysis of Cost and Efficiency of a Medical Nursing Unit Using Time-Driven Activity-Based Costing

      Costs Using Traditional Activity-Based Costing

      *assigned cost/activity quantity.

      Costs and Efficiency Using Time-Driven Activity-Based Costing

      *unit time X activity quantity; †cost driver rate X activity quantity.
      Table 1 Costs Using Traditional Activity-Based Costing

      *assigned cost/activity quantity.

      Table 2 Costs and Efficiency Using Time-Driven Activity-Based Costing

      *unit time X activity quantity; †cost driver rate X activity quantity.

      Table 1

      Table 2

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