Strategic Cost Management · Activity Based Cost Management

Activity Based Management (ABM) for CMA Final

Updated 11 October 2026 · Fact-checked

Activity Based Management (ABM) uses ABC information to manage activities and improve profit. Operational ABM does things right by cutting activity cost. Strategic ABM does the right things by changing product, customer and process choices. To solve questions, classify activities as value-added or non-value-added, cost them, and recommend actions.

Understand Activity Based Management (ABM)

Activity Based Costing (ABC) tells you what activities cost and which products or customers use them. Activity Based Management (ABM) is what you do with that information. ABC is the measurement system. ABM is the management use of it.

ABM looks at the business as a set of activities such as ordering, setting up, inspecting and handling. Each activity consumes resources and has a cost driver. Managers ask two questions: is this activity needed, and can it be done at lower cost?

ABM has two parts. Operational ABM is about doing things right. It improves efficiency of existing activities, for example by reducing set-up time or removing rework. Strategic ABM is about doing the right things. It uses ABC data to decide product mix, pricing, customer profitability, and whether to redesign products or processes, or to drop or outsource something.

A key tool is activity analysis. A value-added (VA) activity is one the customer is willing to pay for, as it changes the product or service in a way the customer wants. A non-value-added (NVA) activity adds cost but no customer value, for example storage, moving materials, inspection, rework and waiting. NVA activities are targets for elimination or reduction. Some activities, like legally required inspection, cannot be removed fully, so you reduce them instead.

Cost reduction in ABM comes from four routes: eliminate activities that add no value, select cheaper activity options, reduce the time or effort an activity needs, and share activities across products (for example by using common components). Cost driver analysis finds the root cause so you fix the cause, not the symptom.

Key rules to remember

Cost driver rate: Activity cost driver rate = Cost of activity pool ÷ Total quantity of cost driver; Used to cost each activity before judging whether it adds value.
Cost of non-value-added activities: NVA cost = Σ (Cost driver rate × Driver quantity wasted or not needed); Add up the cost of every NVA activity to show the saving available.
Value-added cost ratio: VA cost ratio = Cost of value-added activities ÷ Total activity cost × 100; Higher is better. Use to compare periods or products. The complement is the NVA share.
Activity efficiency (cycle time): Manufacturing cycle efficiency = Value-added processing time ÷ Total cycle time; Total time = processing + inspection + moving + waiting. A ratio below 1 shows NVA time.
Operational vs strategic ABM: Operational ABM = do things right; Strategic ABM = do the right things; Learn this one-line contrast for theory questions.

How to solve Activity Based Management (ABM) questions

Use the same sequence for any ABM question, numerical or theory.

1Read what the question asks: classify activities, quantify waste, or recommend an action.
2List the activities and the cost of each. If needed, compute the cost driver rate for each activity pool.
3Classify each activity as value-added or non-value-added. Ask: would the customer pay for it? If not, it is NVA.
4Quantify. Total the VA and NVA costs and find the NVA share, or compute the saving if the NVA activity is cut by a stated percentage.
5Identify the cost driver and root cause of each NVA activity, such as poor layout causing material handling.
6Choose the action: eliminate, reduce, select a cheaper option, or share. State if it is operational or strategic.
7Give a clear recommendation with the rupee saving, and note any limits, such as activities that are legally required.

Quickest way: Two-column VA/NVA sort

When to use it: Use for MCQs and short numerical questions that give a list of activities with costs.

Draw two columns: VA and NVA.
Put each activity in one column using the customer-pays test.
Add each column and write the NVA percentage of total.
Apply any given reduction rate to NVA only, never to VA.
Write the one-line action beside each NVA item.

Common mistakes in Activity Based Management (ABM)

Treating ABM and ABC as the same thing.
Both use activities and cost drivers, so they look alike.
Fix: Say ABC measures cost; ABM uses that information for decisions and improvement.
Calling inspection or storage value-added because it is necessary.
Students confuse 'needed' with 'customer pays for it'.
Fix: Apply the customer test. Necessary but non-value-adding activities are still NVA; you reduce them rather than remove them.
Mixing operational and strategic ABM examples.
Both aim at better profit, so the line blurs.
Fix: Operational means improving how existing activities run. Strategic means choices on products, customers, pricing and processes.
Applying a cost reduction percentage to total activity cost.
Students rush and skip the classification step.
Fix: Apply the reduction only to the NVA cost named in the question.
Listing actions without naming the cost driver.
Students jump to the solution.
Fix: Link each NVA activity to its driver and root cause, then propose the action.

Worked examples

Example 1

A plant's monthly activity costs are: machining ₹6,00,000; assembly ₹4,00,000; material handling ₹1,50,000; inspection ₹1,00,000; rework ₹1,50,000. Machining and assembly are value-added. Management plans to eliminate rework fully and cut material handling by 40% and inspection by 20%. Find the NVA cost, its share of total, and the monthly saving.

Show the solution

Total activity cost = 6,00,000 + 4,00,000 + 1,50,000 + 1,00,000 + 1,50,000 = ₹14,00,000.
VA cost = 6,00,000 + 4,00,000 = ₹10,00,000.
NVA cost = 1,50,000 + 1,00,000 + 1,50,000 = ₹4,00,000.
NVA share = 4,00,000 ÷ 14,00,000 × 100 = 28.57%.
Saving: rework 100% of 1,50,000 = ₹1,50,000; handling 40% of 1,50,000 = ₹60,000; inspection 20% of 1,00,000 = ₹20,000.
Total saving = 1,50,000 + 60,000 + 20,000 = ₹2,30,000.

Answer: NVA cost is ₹4,00,000 (28.57% of ₹14,00,000). The monthly saving is ₹2,30,000, which leaves NVA cost at ₹1,70,000.

Example 2

Distinguish operational ABM from strategic ABM with one example of each from a Pune auto-component maker.

Show the solution

Define operational ABM: it improves efficiency of existing activities, so the firm does things right.
Example: set-up time on a press line is cut by redesigning tooling. Set-up cost falls and the activity is cheaper per batch.
Define strategic ABM: it uses ABC data to change the choice of products, customers or processes, so the firm does the right things.
Example: ABC shows a low-volume bracket uses many set-ups and handling runs and loses money at the current price. The firm raises its price, redesigns it to use common parts, or drops it.
Contrast: operational ABM lowers the cost of what is done; strategic ABM changes what is done.

Answer: Operational ABM is cost and efficiency improvement within existing activities, such as reducing set-up time. Strategic ABM is decision-making on product mix, pricing, customers and process design, such as repricing or dropping an unprofitable bracket.

Exam tips

In theory answers, always give both definitions and one example each for operational and strategic ABM.
In numerical questions, show the VA and NVA split before any saving calculation; marks follow the classification.
Use the words 'customer willing to pay' when justifying VA status.
End case answers with a recommendation and the rupee saving, not just a list of activities.
Expect MCQs on terms such as cost driver, NVA activity and cost reduction routes; learn the four routes by heart.

Practice questions from Activity Based Cost Management

Activity Based Management (ABM) in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Activity Based Management (ABM): frequently asked questions

What is the difference between ABC and ABM?

ABC is a costing method that assigns costs to activities and then to products using cost drivers. ABM uses that information to improve operations and make strategic decisions. ABC measures; ABM acts.

What are value-added and non-value-added activities?

A value-added activity is one the customer will pay for because it adds the features they want. A non-value-added activity adds cost but no customer value, such as storage, waiting, rework and moving materials.

Can all non-value-added activities be eliminated?

No. Some, like statutory inspection or necessary handling, must continue. You aim to reduce their cost and time, and to eliminate those that serve no required purpose.

What is operational and strategic ABM?

Operational ABM improves the efficiency of current activities and is about doing things right. Strategic ABM uses ABC data to change product mix, pricing, customer focus and process design, and is about doing the right things.