Cost accounting chapter 3

Simple costing system single indirect-cost pool  Identify the products that are the chosen cost objects  Identify the direct costs of the products  Select the cost-allocation bases to

Chapter 4: Activity-based costing

Broad averaging and its consequences

 Undercosting: a product consumes a high level of

resources but is reported to have a low cost per unit

 Overcosting: a product consumes a low level of

resources but is reported to have a high cost per unit

 Product-cost cross-subsidisation: if a company

undercosts one product then it overcosts at least one other product A cost is uniformly spread across

products without a recognition of which products

require what resources in what amounts

Simple costing system

(single indirect-cost pool)

 Identify the products that are the chosen cost objects

 Identify the direct costs of the products

 Select the cost-allocation bases to use for allocating indirect costs to the products

 Identify the indirect costs associated with each cost-allocation base

 Compute the rate per unit of each cost-allocation base used to allocate indirect costs to the products

 Compute the indirect costs allocated to the products

 Compute the total costs of the products

Refining a costing system

 A refined costing system reduces the use of broad averages for assigning the cost of

resources to cost objects and provides better measurement of the costs of indirect

resources used by different cost objects

Causes of a refined costing system

 Increase in product diversity

 Increase in indirect costs

 Advances in information technology

 Competition in product markets

 Activity based costing (ABC) refines a

costing system by identifying individual

activities as the fundamental cost objects

 An activity is an event, task, or unit of work with a specific purpose – e.g designing

products, setting up machines, operating machines, distributing products

Fundamental

cost objects Assignment of other cost

objects

activities  Costs of

activities

- Cost of

products, services, customers

 Direct-cost tracing: ABC system reclassifies some indirect costs as direct costs by evaluating if some currently indirect costs can be traced to cost objects

 Indirect-cost pools: ABC system create smaller

indirect cost pools linked to the different activities

 Cost allocation bases: for each activity cost pool, a measure of the activity performed served as the

cost-allocation base

Cost hierarchies

 A cost hierarchies categories indirect cost into

different cost pools on the basis of the different types

of cost drivers, or cost allocation bases or different degrees of difficulty in determining cause and effect relationship ABC commonly uses a cost hierarchies with 4 levels:

 Output unit-level cost

 Batch level costs

 Product sustaining costs

 Facility sustaining costs

 Output unit-level cost: the costs of activities

performed on each individual unit of a product or service

 Batch level costs: the costs of activities related to a group of units or products or services rather than to each individual unit of product or service

 Product sustaining costs: the costs of activities to support individual products regardless of the No of units or batches

 Facility sustaining costs: the costs of activities that cannot be traced to individual products but that

support the organisation as a whole

Implementing ABC

 Identify the products that are the chosen cost objects

 Identify the direct costs of the products

 Select the cost allocation bases to use for allocating indirect costs to the products

 Identify the indirect costs associated with each cost allocation base

 Compute the rate per unit of each cost allocation base used to allocate indirect costs to the products

 Compute the indirect costs allocated to the products

 Compute the total cost of the products by adding all direct and indirect costs assigned to the products

Using ABC for improving cost

management and profitability

 Activity based management is a method of management decision making that uses

activity based costing information to improve customer satisfaction and profitability

 ABM includes decisions about pricing and

product mix, reduction of costs, improvement

of processes, and product design

 Pricing and product mix decisions: ABC

system gives managers cost information that helps on making and selling diverse products

 Cost reduction and process improvement

decisions: ABC systems helps identify where and how to reduce costs

 Design decisions: management can evaluate how its current product and process designs affect activities and costs as a way of identifying new designs to

reduce costs

 Planning and managing activities: companies specify budgeted costs for activities and use budgeted cost rates to cost products using normal costing At year end, budgeted and actual costs are compared to see how well activities were managed

ABC and department costing systems

 Many companies use separate indirect cost rates for each department or each

subdepartment

Implementing ABC systems

 Significant amount of indirect costs are allocated using one or two cost pools

 All or most indirect costs are identified as output

unit-level costs (few indirect costs as batch-unit-level costs,

product/facility-sustaining costs)

 Products make diverse demands on resources because

of differences in volume, process steps

 Products that a company is well suited to make show a small profits, products that a company is less suited to produce show large profits

 Operations and accounting staff have significant

disagreement about the costs of manufacturing and

marketing products or services

ABC in service and merchandising

companies

 ABC has many applications in service and

merchandising companies

 Costs are divided into homogenous cost pools and classified as output unit level costs, batch level

costs, product sustaining costs, or facility sustaining costs

 The cost pools correspond to activities

 Costs are allocated to products/customers using cost allocation bases that have a cause-and effect

relationship with the costs in the cost pool

 In a bank, ABC applications: calculate cost of

performing ATM transactions, opening and closing accounts, administering mortgage, processing Visa transactions Help identify profitable products and customer segments

 ABC in service: postal service: calculate cost of

delivering mails Delivering to remote locations is far greater than delivering within urban areas ABC

helps manage and reduce costs