Definition
In activity-based costing (ABC) systems, an activity measure serves as a quantifiable metric for assessing the volume or rate of an activity. It forms the basis for allocating costs within an activity cost pool. The ideal activity measure is one where its variability (rise or fall) closely corresponds with changes in the total activity cost. Thus, the terms “activity measure” and cost driver are often used interchangeably.
ABC systems aim for precise cost allocation by ensuring that activity measures accurately reflect the consumption of resources.
Examples of Activity Measures
- Direct Labour Hours: Measures the amount of labor hours directly associated with production.
- Machine Hours: Tracks the number of hours machines are in operation.
- Number of Deliveries: Counts the total deliveries made within a period.
- Units of Output: Quantifies the number of units produced.
- Number of Production Run Set-ups: Counts the number of times production setups are performed.
The scope of activity measures can range significantly. Large international organizations may use thousands of such measures, whereas smaller entities may identify 20-30 key measures.
Frequently Asked Questions (FAQs)
1. What is the primary purpose of an activity measure in ABC systems?
The primary purpose is to accurately allocate costs to different activities based on their consumption of resources, ensuring precise cost management.
2. How does an activity measure differ from a cost driver?
In the context of ABC systems, the terms are often used interchangeably. Both refer to metrics that lead to a change in activity costs.
3. Why might multiple activity measures be used for a single activity?
Multiple measures can provide a more thorough representation of resource consumption, leading to more accurate cost allocation.
4. Can activity measures be unrelated to the volume of production?
Yes, certain measures, such as the number of orders, may not directly correlate with production volume but still impact costs.
5. Is there an optimal number of activity measures for an organization?
No, the number of activity measures depends on the organization’s complexity and need for detailed cost tracking.
Related Terms
- Activity-Based Costing (ABC): A costing methodology that assigns overhead and indirect costs to specific activities.
- Cost Driver: A factor that causes the cost of an activity to change.
- Activity Cost Pool: A grouping of all costs associated with a particular activity.
- Allocation Base: A metric used to distribute costs among different cost objects.
- Direct Labour Hours: The time spent by workers directly involved in production.
- Machine Hours: The total operational hours of machines.
- Production Run Set-Ups: The preparation needed before starting a production run.
Online References
- Investopedia on Activity-Based Costing (ABC)
- Accounting Coach - Activity Measures
- CMA Exam Academy - Cost Allocation
- Corporate Finance Institute (CFI) - Cost Drivers
Suggested Books for Further Studies
- “Managerial Accounting” by Ray H. Garrison, Eric W. Noreen, and Peter C. Brewer.
- “Cost Accounting: A Managerial Emphasis” by Charles T. Horngren, Srikant M. Datar, and Madhav V. Rajan.
- “Introduction to Management Accounting” by Charles T. Horngren, Gary L. Sundem, and William O. Stratton.
- “Activity-Based Costing: Making It Work for Small and Mid-Sized Companies” by Douglas T. Hicks.
Accounting Basics: “Activity Measure in Activity-Based Costing” Fundamentals Quiz
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