CMA Final · Strategic Cost Management
Product Life Cycle Costing for CMA Final Strategic Cost Management
Product life cycle costing tracks all costs of a product from research and design through production, sales, service and disposal, and compares them with lifetime revenue. To solve problems, split costs by phase, total them across the life, then divide by lifetime units to get cost per unit and lifetime profit.
What this chapter covers
This chapter in Paper 16, Strategic Cost Management, looks at a product as a whole, not as one year's profit. You learn how a product moves through introduction, growth, maturity and decline, and how costs and revenues behave in each stage. Then you learn to add up costs across the full life, including those before production starts and those after sale.
The key idea is that most of a product's cost is committed early, during design and development, even though much of the spending happens later. So the chapter pushes you to manage cost at the planning stage. Traditional costing often writes off research and design as period costs. Life cycle costing keeps them attached to the product.
The chapter links closely to target costing, value engineering and other cost management techniques in the same paper. Numerical questions need clean phase-wise workings and a clear recommendation, such as whether to launch, continue or drop a product. If you understand this chapter well, those related chapters become easier.
Strategic Cost Management needs decision-oriented answers, and this chapter trains exactly that. Theory parts can be asked as short descriptive questions or as MCQs, and the numerical part is mostly arithmetic once your layout is right. The chapter is compact, so effort here gives a good return. It also gives you vocabulary and logic that you can reuse when writing answers on target costing and other techniques, which makes the rest of the paper easier to score in.
Product Life Cycle Costing: topics in the order to study them
- 1Product Life Cycle Concepts and StagesStart here, because the stages and their cost and revenue patterns are the base for everything else.
- 2Life Cycle Costing: Cost Components and PhasesNext, learn which costs fall in which phase, since correct classification decides every numerical answer.
- 3Life Cycle Costing Numerical ProblemsPractise sums only after the concepts and phases are clear, so you build workings on understanding and not memory.
- 4Benefits, Limitations and Link to Target CostingFinish with evaluation and linkages, which you can write well once you have worked through the numbers.
How to prepare Product Life Cycle Costing
Aim to be able to explain the idea in a few lines and then solve a sum in a clean layout. Use this order.
- Read the stages of the life cycle and note, in your own words, how sales, cost and profit behave in each one.
- Make a one-page list of cost components by phase: before production, production, and after sale including service and disposal.
- Learn the core idea in plain words: costs are committed early, spent later, and must be tracked for the whole life.
- Solve numerical problems in a fixed layout: costs by phase, total lifetime cost, lifetime units, cost per unit, lifetime revenue and profit.
- After every sum, write a two-line recommendation such as launch, continue or redesign, because the paper rewards decisions.
- Prepare a short answer on benefits, limitations and the link to target costing, using two or three points for each.
- Revisit your mistakes list and redo two or three sums a few days later without looking at the solution.
Common mistakes in Product Life Cycle Costing
Treating research and design cost as a loss of the year in which it is spent
Fix: Attach pre-production costs to the product and include them in total lifetime cost.
Leaving out after-sale costs such as warranty, service and disposal
Fix: Scan the question for every phase and tick off each one before you total.
Dividing lifetime cost by one year's units
Fix: Add units across all years first, then divide by the total lifetime units.
Ending a numerical answer with figures but no recommendation
Fix: Write one or two lines stating the decision and the reason from your numbers.
Confusing life cycle costing with target costing
Fix: Remember that life cycle costing measures cost over the whole life, while target costing starts from the price and works back to an allowed cost.
Last-day revision: Product Life Cycle Costing
- Life cycle stages: introduction, growth, maturity, decline.
- Life cycle costing covers cost from design to disposal, not just production.
- Early-stage decisions commit most of the product's total cost.
- Pre-production costs include research, design, development and testing.
- Production-phase costs include materials, labour, overheads and tooling.
- After-sale costs include warranty, service and disposal or decommissioning.
- Lifetime cost per unit = total lifetime cost ÷ total lifetime units.
- Lifetime profit = lifetime revenue − lifetime cost.
- Always check whether a cost is for the whole life or per year before dividing.
- Life cycle costing supports pricing, launch and drop decisions.
- It links to target costing because both aim to manage cost at the design stage.
- Limitations include forecasting difficulty and the effort of collecting data across phases.
Product Life Cycle Costing practice questions
- Which of the following best describes the typical committed-cost pattern in product life cycle costing for a manufactured product?
- Kaveri Electronics plans a gadget with total life-cycle cost of ₹1,20,00,000 over 30,000 units. Of this, 80% is committed (locked in) at the…
- Meera Tech expects a product to sell 2,000 units in year 1, 5,000 in year 2, 4,000 in year 3 and 1,000 in year 4. Selling price is Rs 800 pe…
- Narmada Pharma launches a drug with the following life-cycle data: R&D ₹30,00,000; production over life 50,000 units at variable cost ₹240 p…
- Rohan Appliances is developing a new air purifier. Pre-launch costs are: R&D Rs 18 lakh and design Rs 6 lakh. Over the product's life, produ…
- Anaya Foods plans a product with a 5-year life. Pre-launch costs are Rs 12,00,000. Annual sales are 20,000 units at Rs 300 with variable cos…
- A firm finds that about 70% of a product's life cycle cost is committed during design, although only about 10% has been spent by then. What …
- A product's life cycle cost is the total of costs incurred from design through to withdrawal and support. Which of the following costs would…
Product Life Cycle Costing in other exams
The same ground in other exams, if you are preparing for more than one or want another angle on it.
Product Life Cycle Costing: frequently asked questions
What is product life cycle costing in simple terms?
It is the practice of adding up every cost of a product over its whole life, from design to disposal. You then compare that total with the revenue the product earns. It shows the true profit of a product, not just yearly profit.
How should I answer a life cycle costing numerical question?
Group the costs by phase, add them up, and add the units across all years. Then work out cost per unit and lifetime profit. Finish with a short recommendation based on the result.
Is this chapter more theory or more numericals?
It has both. The concepts, stages, benefits and limitations can be asked as MCQs or short answers, while the cost phases are tested through sums. Prepare both so you can handle either form.
How does life cycle costing link to target costing?
Both try to control cost early, when most of it is decided. Life cycle costing gives the full-life cost view, and target costing uses that view to keep the product cost within a limit set from the market price.