CMA Final · Strategic Cost Management
Just in Time (JIT) for CMA Final Strategic Cost Management
Just in Time (JIT) is a system that buys, makes and delivers only what is needed, only when it is needed, and only in the quantity needed. Its aim is to cut inventory, waste and lead time. To solve questions, link each JIT feature to its cost effect, and know how backflush costing records entries.
What this chapter covers
This chapter in Paper 16, Strategic Cost Management, deals with JIT as both a production philosophy and a cost system. You start with the idea: remove waste by producing to demand. Then you see what a factory must have in place for it to work, how a pull system is run with Kanban cards, and how accounts change when stock almost disappears.
The chapter is small, but it is built from connected parts. The philosophy explains the elements. The elements explain Kanban. Together they explain why traditional cost records, with several stock accounts, become less useful and why backflush costing is used.
JIT links to other parts of the paper. It shares the waste-removal logic of lean thinking, continuous improvement and total quality management. It also touches supply chain and inventory decisions, and it changes how you view overhead, cost drivers and performance measures. Reading it alongside those chapters helps you answer case-based questions.
JIT suits both objective questions and short written answers. Definitions, prerequisites, Kanban and backflush trigger points are easy to test as 2-mark MCQs, and the benefits-versus-limitations theme fits a case-based answer where you must recommend whether a company should adopt JIT. The content is limited, so a few focused revision rounds can give you secure marks. Students who treat it as theory alone lose marks on the backflush entries and on applying the ideas to a given business.
Just in Time (JIT): topics in the order to study them
- 1JIT Philosophy and ConceptEverything else rests on the idea of producing to demand and removing waste, so learn it first.
- 2Elements and Prerequisites of JITOnce you know the aim, you can see which conditions, such as quality, supplier ties and layout, make it workable.
- 3Kanban and Pull System of ProductionKanban is the working tool that applies the elements, and it is clearer after you know pull versus push logic.
- 4Costing and Accounting under JIT (Backflush)Accounting changes only make sense once you understand low stock and short production cycles.
- 5Benefits, Limitations and Implementation of JITThis closes the chapter by letting you judge JIT, which is how case questions ask for it.
How to prepare Just in Time (JIT)
Prepare this chapter in short sessions, mixing concept clarity with a little practice on entries and application.
- Write the JIT definition in your own words and list the types of waste it targets, then compare it with the traditional push approach.
- Make a one-page list of the elements and prerequisites, and for each one note why JIT fails without it.
- Draw the Kanban flow by hand: production card, withdrawal card, container, and how a signal pulls work from the previous stage.
- Learn backflush costing by trigger points: when entries are made, which accounts are skipped, and where conversion cost is recorded. Practise two or three small entry problems.
- Prepare a benefits and limitations table, and add the conditions under which a business should or should not adopt JIT.
- Attempt MCQs and a short case, giving a clear recommendation with reasons tied to the facts.
- Revise the one-page notes twice before the exam.
Common mistakes in Just in Time (JIT)
Describing JIT as just keeping zero stock
Fix: Present JIT as a philosophy of waste removal and continuous improvement. Low stock is a result, not the whole idea.
Mixing up push and pull systems
Fix: Remember: push produces to a forecast or schedule; pull produces only when a later stage signals demand.
Listing prerequisites without explaining why they matter
Fix: Give each prerequisite one line on what breaks without it, for example poor quality halting the line.
Making wrong or unsupported backflush entries
Fix: Identify the trigger points first, then record entries only at those points and be clear which stock accounts are omitted.
Giving a one-sided answer on benefits and limitations
Fix: Cover both sides and finish with a recommendation tied to the facts given in the case.
Treating Kanban as the whole of JIT
Fix: Show Kanban as one tool that supports the pull system within the wider JIT approach.
Last-day revision: Just in Time (JIT)
- JIT means producing and buying only what is needed, when it is needed, in the quantity needed.
- The main aim is to remove waste and reduce inventory, lead time and set-up time.
- JIT is a pull system: production is triggered by demand, not by forecasts.
- Traditional systems push production through the plant based on schedules.
- High quality at source and few defects are essential for JIT to work.
- Close, reliable relationships with a small number of suppliers are a core prerequisite.
- Kanban is a card or signal system that authorises production or movement of materials.
- Backflush costing records costs after the event, working backward from output.
- Backflush costing reduces detailed tracking and may drop the raw material or work-in-process account.
- Key limits of JIT are supply disruption risk and dependence on stable demand.
- JIT needs employee involvement, multi-skilled workers and a culture of continuous improvement.
- In a case question, link JIT suitability to demand stability and supplier reliability before recommending.
Just in Time (JIT) practice questions
- Which one of the following is a defining feature of a JIT purchasing arrangement between a manufacturer and its suppliers?
- Under JIT, a cell at Narmada Engineering has a set-up time of 2 hours per batch and runs 10 batches a month. Machine cost is Rs 600 per hour…
- Which of the following is the primary reason a firm adopting Just in Time (JIT) purchasing typically negotiates long-term contracts with a s…
- A manufacturer moving to Just in Time wants to compare its purchasing approach before and after. Which of the following is a characteristic …
- Which of the following is a characteristic of a Just in Time (JIT) purchasing arrangement with suppliers?
- Rao Engineering adopts JIT and plans to cut average inventory from Rs 24,00,000 to Rs 6,00,000, a release of Rs 18,00,000. Cost of capital i…
- Kaveri Auto Components moves to JIT and cuts average inventory from Rs 24,00,000 to Rs 6,00,000. Its carrying cost is 15% per annum on avera…
- Himalaya Gears adopts JIT. Annual demand is 12,000 units. Before JIT, setup cost was Rs 1,800 per setup and carrying cost Rs 10 per unit per…
Just in Time (JIT) in other exams
The same ground in other exams, if you are preparing for more than one or want another angle on it.
Just in Time (JIT): frequently asked questions
Is Just in Time a costing method or a production method?
It is mainly a production and inventory philosophy. It does change costing, because low stock and short cycles lead to simpler methods such as backflush costing.
What is backflush costing in simple words?
It records costs after goods are completed or sold, working backward from output to assign costs. This avoids detailed tracking of every stage and reduces the number of entries.
How is Kanban related to JIT?
Kanban is a signalling tool used to run the pull system. Cards tell an earlier stage what to make or move and in what quantity, so work follows actual demand.
Can any business adopt JIT?
Not easily. JIT works best where demand is fairly stable, suppliers are reliable and quality is high. Businesses with erratic demand or weak supply chains face higher risk.
Should I expect numericals from this chapter?
Backflush entries are the most likely numerical area, while the rest is largely conceptual. Prepare for both MCQs and short case-based written answers.