Traditional approaches to cost assignment 1: An overview

Summary

This video series explores traditional approaches to allocating overhead costs, focusing on plant-wide and departmental methods. It covers key concepts like distinguishing between direct and indirect costs, the different methods for cost allocation, and how to choose between budgeted and actual overhead rates. The plant-wide method involves a single cost driver for the entire factory, while the departmental approach uses different drivers for each department. Additionally, it introduces activity-based costing, highlighting its detailed approach using a variety of cost drivers. Finally, the video discusses the pros and cons of using predetermined overhead rates versus actual overhead rates.

Takeaways

• 😀 Direct costs, such as materials and labor, can be traced directly to products, while indirect costs, like supervision and maintenance, require allocation methods.
• 😀 Simplistic cost allocation methods, like plant-wide rates, are inexpensive but less accurate, whereas sophisticated methods, like activity-based costing, are costlier but more precise.
• 😀 Plant-wide overhead allocation uses a single volume-based cost driver for the entire factory, such as direct labor hours, machine hours, or units produced.
• 😀 Departmental overhead allocation splits the factory into departments, calculates separate rates, and allows different cost drivers per department for improved accuracy.
• 😀 Service departments provide support but do not produce products directly; their costs are reallocated to production departments using methods like direct, step-down, reciprocal, or simultaneous equations.
• 😀 Activity-based costing (ABC) identifies multiple activities instead of departments and allocates overhead based on the cost of performing each activity.
• 😀 ABC uses both volume-based and non-volume-based cost drivers to create a cause-and-effect relationship between costs and activities, enhancing accuracy.
• 😀 Using actual overhead rates can be problematic due to untimeliness and fluctuating activity levels; predetermined rates based on budgeted costs and normal activity levels are preferred.
• 😀 Predetermined overhead rates can lead to variances: fixed overhead expenditure variance (budgeted vs. actual costs) and fixed overhead volume variance (normal vs. actual activity levels).
• 😀 Comparing methods: plant-wide rates are simple and low accuracy, departmental rates offer medium accuracy with multiple cost drivers, and ABC provides high accuracy with granular activity-based allocations.

Q & A

What is the main difference between direct and indirect costs?

Direct costs, such as direct materials and direct labor, can be traced directly to a cost object, while indirect costs, such as supervision and maintenance, cannot be directly traced and require allocation methods.

What are the main characteristics of simplistic versus sophisticated cost allocation methods?

Simplistic methods are inexpensive, rely on arbitrary allocations, and have lower accuracy with higher error costs. Sophisticated methods are more expensive, rely on cause-and-effect relationships, and provide higher accuracy with lower error costs.

How does the plant-wide overhead rate method work?

The plant-wide method calculates one overhead rate for the entire factory using a single volume-based cost driver (like direct labor hours, machine hours, or units produced) and allocates overhead to cost objects based on this rate.

What is the advantage of using departmental overhead rates over plant-wide rates?

Departmental rates allow each department to have its own cost driver, making allocations more reflective of actual resource usage and resulting in more accurate product costs.

What are the main methods for reallocating service department costs in a departmental approach?

The four main methods are: the direct method, the step-down (specified order of closing) method, the reciprocal (repeated distribution) method, and the simultaneous equation method.

How does activity-based costing (ABC) differ from departmental overhead allocation?

ABC allocates overhead to multiple activities rather than departments, does not distinguish between service and production activities, and uses a wider range of cost drivers, including both volume-based and non-volume-based drivers, for greater accuracy.

Why is using actual overhead rates often impractical?

Actual overhead rates are not timely because total costs and activity levels are known only at the end of the period, and short-term calculations can fluctuate, leading to unstable product costs and pricing.

What is a predetermined overhead rate and why is it preferred?

A predetermined overhead rate is based on estimated annual overhead costs and normal activity levels, allowing timely and stable allocation of overhead costs, which is especially useful for providing customer quotes.

What types of variances can arise when using a predetermined overhead rate?

Two main variances arise: expenditure variance (difference between budgeted and actual costs) and volume variance (difference between normal and actual activity levels). Together, they result in under- or over-recovery of overheads.

What factors should be considered when choosing a cost allocation system?

The choice should balance the cost of implementing the system against the benefit of improved accuracy, considering the complexity of operations, available data, and the need for timely information.

Give examples of volume-based cost drivers and non-volume-based cost drivers.

Volume-based cost drivers include direct labor hours, machine hours, and units produced. Non-volume-based cost drivers might include the number of material orders, number of machine setups, or engineering hours for a specific activity.

Why does ABC provide more accurate product costing compared to traditional methods?

ABC provides more accuracy because it considers multiple activities, allocates overhead based on actual resource consumption, and uses cost drivers that reflect cause-and-effect relationships, capturing complexity that departmental or plant-wide methods cannot.