Book cover for Horngren’s Cost Accounting

Horngren’s Cost Accounting

Srikant M. Datar, Madhav V. Rajan

ISBN #9780134475585

16th Edition

1,010 Questions

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58,980 Students Helped

Homework Questions

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Summary
Learning Objectives
Key Concepts
Example Problems
Explanations
Common Mistakes

Summary

This chapter explores various methods for allocating support department costs, emphasizing the critical differences between single-rate and dual-rate methods. The single-rate approach, although simple, lumps fixed and variable costs into one rate, which can obscure the underlying cost behavior. In contrast, the dual-rate method separates these costs, providing deeper insights that enhance decision making, particularly in scenarios like outsourcing where fixed costs should not influence marginal cost decisions. Additional topics such as budgeting versus actual measures, different allocation methodologies (direct, step-down, reciprocal), and revenue allocation strategies are discussed to provide managers with a robust framework for effective cost control.

Learning Objectives

1

Differentiate between the single-rate and dual-rate methods for allocating support department costs.

2

Analyze how the separation of fixed and variable costs in the dual-rate method affects decision making.

3

Evaluate the impact of using budgeted versus actual rates and usage measures on cost allocation and efficiency controls.

4

Assess the advantages and disadvantages of both allocation methods in various business contexts.

5

Apply various allocation methods such as direct, step-down, and reciprocal methods in practical cost and revenue allocation scenarios.

Key Concepts

CONCEPT

DEFINITION

Single-Rate Method

A cost allocation method that combines fixed and variable costs into one overall rate, making it simpler to compute but potentially less insightful for decision making.

Dual-Rate Method

A cost allocation method that separates fixed costs from variable costs, providing more detailed insights for managerial decisions and better control over efficiency improvements and outsourcing decisions.

Budgeted Versus Actual Rates

The practice of choosing between predetermined (budgeted) rates and actual incurred cost rates, affecting the accuracy and control aspects of cost allocation.

Budgeted Versus Actual Usage

This term refers to the decision to allocate costs based on usage predicted in budgets as opposed to actual observed usage, thereby impacting the treatment of uncontrollable fixed costs.

Fixed-Cost Allocation

The process of allocating the fixed portion of support department costs, which are often allocated differently in single-rate versus dual-rate methods.

Direct, Step-Down, and Reciprocal Methods

Different techniques used to allocate interdepartmental costs: the Direct Method ignores reciprocal services; the Step-Down Method partially recognizes interservice relationships by allocating in a sequential order; and the Reciprocal Method fully accounts for the mutual services among departments.

Bundling and Revenue Allocation

The process of grouping related costs or revenues together for allocation purposes, which can further complicate or clarify managerial decision-making depending on the method applied.

Example Problems

Example 1

Distinguish between the single-rate and the dual-rate methods.

Example 2

Describe how the dual-rate method is useful to division managers in decision making.

Example 3

How do budgeted cost rates motivate the support-department manager to improve efficiency?

Example 4

Give examples of allocation bases used to allocate support-department cost pools to operating departments.

Example 5

Why might a manager prefer that budgeted rather than actual cost-allocation rates be used for costs being allocated to his or her department from another department?
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Step-by-Step Explanations

QUESTION

How do you allocate support department costs using the single-rate method?

STEP-BY-STEP ANSWER:

Step 1: Combine all fixed and variable costs of the support department into one total cost pool.
Step 2: Determine the allocation base (such as usage of materials-handling services or supply of capacity) that best reflects how costs are incurred.
Step 3: Divide the total combined cost by the total units of the allocation base to obtain a single allocation rate.
Step 4: Allocate the support department costs to other departments by multiplying the single rate with each department’s usage measure.
Final Answer: The support department costs are allocated using a universally applied rate derived from combining fixed and variable costs, applied to each department’s usage measure.

Single-Rate Method

QUESTION

How do you allocate support department costs using the dual-rate method?

STEP-BY-STEP ANSWER:

Step 1: Separate the support department costs into fixed and variable components.
Step 2: Select an appropriate allocation base for the variable costs and another for the fixed costs if necessary.
Step 3: Calculate the variable cost rate by dividing the total variable costs by the total budgeted or actual usage of the allocation base.
Step 4: Allocate variable costs to other departments based on their usage of the allocation base.
Step 5: Allocate fixed costs separately, often using budgeted usage measures to prevent uncontrollable fixed overheads from unduly influencing marginal decisions.
Final Answer: The dual-rate method involves a two-step allocation where variable costs are allocated based on actual usage and fixed costs are allocated using budgeted measures, providing better insights into the cost structure.

Dual-Rate Method

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Common Mistakes

  • Confusing the single-rate method with the dual-rate method - assuming that both treat fixed and variable costs in the same way.
  • Overlooking the importance of choosing the correct allocation base and failing to differentiate between budgeted and actual usage.
  • Allocating fixed costs based on actual usage in marginal decision-making scenarios, thereby misrepresenting uncontrollable cost behavior.
  • Using a one-size-fits-all approach instead of tailoring the cost allocation method to the specific characteristics of support departments.
  • Neglecting to understand the implications of bundling revenues and costs, which can lead to inaccurate performance evaluations.