1. Advanced Costing - ABC Activity Based CostingF5
Advanced Costing - ABC
Activity Based Costing

2. ABC Activity Based Costing Harvard professors Kaplan and Cooper
Allocates overheads based on benefits received from a particular indirect activity
How to ensure that each cost unit receives a fair share when allocating and absorbing overheads

3. Activity based costing
A method of allocating overhead costs to products and services.
Asks the question: ‘What drives cost?’
Example: social work department of local authority
Department A uses taxis for travel to client work; Department B takes bus or walks. Overhead cost of travel (taxi plus bus) is shared across A and B by number of people in each department.
What drives cost of taxis?
Number and length of journeys (all in A).

4. Activity-Based Costing System
ABC calculates the costs of individual activities and assigns costs to cost objects such as products and services on the basis of the activities undertaken to produce each product or service.

5. ABC Definitions
Activities “ value adding process that consumes resources”
Cost Driver “ activity or factor which generates costs”
Cost Pool “pooling or collection of overhead cost which relates to a specific activity”
Cost driver rate = Cost Pool/Cost Driver volume

6. Activity Based Costing (ABC)
Steps
Identify major activities.
Identify appropriate cost drivers (note: you may have to justify your choice here in the exam) for each activity.
Collect costs into pools based upon the activities.
Calculate a cost driver rate e.g. €10 per order to cover overheads in purchasing
Charge support overheads to products on the basis of their usage of the activity

7. Activity Based Costing (ABC)
Cost driver rate = total driver pool cost
cost driver volume

8. Assumptions underlying ABC
All overheads are variable
Activities consume resources
This consumption of resources drives costs
Indirect costs are high relative to direct costs
Products or services are complex
Products or services are tailored to customers specifications
Some products are sold in large qty and others in smaller numbers

9. Traditional approach to flow of overhead costs
Identify overhead costs and identify cost centres that accumulate costs.
Step 1:Allocate indirect costs to cost centres.
Step 2:Apportion service cost centre to production cost centres.
Step 3: Absorb overhead costs into product.
PROBLEM : Too Simplistic, not reflecting modern business complexity

10. Traditional and activity-based costing for overheads
Cost centres
Cost pools
Overhead cost rate
Cost driver rate
Allocate cost using cost rate to measure consumption of cost
Allocation cost using cost driver rate and estimated demand for cost

11. Problems With Traditional Methods
Production systems were historically labour intensive or machine intensive
Mass production of standard items
In complex manufacturing production is based on smaller customised batches
Indirect costs are a high % of total costs
These activities of scheduling, order handling and quality control not related to production volume

12. ABC – Cost Drivers Set up costs – number of manufacturing set ups
Order Processing costs- number of orders
Packing dept – number of orders packed
Engineering dept – number of production runs/orders
Air conditioning Maintenance – number of air con units

13. Advantages of ABC More realistic costs.
Better insight into cost drivers, resulting in better cost control.
Particularly useful where overhead costs are a significant proportion of total costs.
ABC recognises that overhead costs are not all related to production and sales volume.
ABC can be applied to all overhead costs, not just production overheads.
ABC can be used just as easily in service costing as in product costing.

14. Traditional V ABC Merits of ABC
ABC recognises activities cause costs and products consume activities
Easier to manage activities than costs
Focus is then on activities that are not adding value and on cost reduction
Used to analyse the profitability of customers and products or services
Assists the decision making process
Used as a basis for budgeting and planning of overheads

15. Criticisms of ABC
It is impossible to allocate all overhead costs to specific activities.
Some arbitrary apportionment will remain
The choice of both activities and cost drivers might be inappropriate.
ABC can be more complex to explain to the stakeholders of the costing exercise.
The benefits obtained from ABC might not justify the costs.

16. Traditional V ABC Criticisms of ABC
Allows accurate product pricing but some industries are market led in terms of price
Needs to be applied properly in decision making to be of benefit
Will management make use of it?
Lack of bespoke computer systems

17. Benefits from first steps in an ABC System
The ABC model shifts the focus from what the money was being spent on (labor, equipment, supplies) to what the resources acquired by spending are actually doing

18. Completing the ABC Model
Once the activity cost drivers had been determined, the following quantitative information is needed:
The total quantity of each activity cost driver
The quantity of cost driver used by each product

19. Completing the ABC Model
Calculate the activity cost driver rate (ACDR) by dividing the activity expense by the total quantity of the activity cost driver
Multiply the activity cost driver rate by the quantity of each activity cost driver used by each of the four products

20. Implications of ABC
Pricing - more realistic costs improve cost-plus pricing.
Survey found that most pricing decisions are based on
“face to face research”
Competitive analysis
ABC
Breakeven analysis

21. Implications of ABC Decision making – Planning and Control
for example, research and development can be directed at products with better margins.
Promoting or discontinuing products
Planning and Control
Insight into how costs are structured and incurred
Sales Strategy
- more realistic margins can help focus sales strategy.
Increased sales effort on different products

22. Problems Implementing ABC
Problems may arise in practice from the approach to activity-based costing that assigns many resource expenses to activities based on interviews, surveys, and direct observation of production and support processes because these activities are time-consuming and expensive

23. Problems Implementing ABC
Inaccuracies and bias may affect the accuracy of cost driver rates derived from individuals’ subjective estimates of their past or future behaviour
Companies must periodically repeat the interviewing and surveying processes if they want to keep their activity-based cost systems updated
Adding new activities to the system is also difficult, requiring re-estimates of the relative amount of resource time and effort required by the new activity

24. Problems Implementing ABC
A more subtle and serious problem arises from the interview or survey process
People estimating how much time they spend on a list of activities handed to them invariably report percentages that add up to 100%
Few individuals report that a significant percentage of their time is idle or unused

25. Problems Implementing ABC
Recent journals have highlighted the following
Incorrect belief that ABC can solve all problems
Lack of correct type of data
Difficulty in determining the correct cost drivers
Recent surveys put ABC usage in the UK at about 25%