HookThe week KFC ran out of chicken
In February 2018 KFC moved the contract for delivering chicken to its roughly 900 UK restaurants from Bidvest Logistics — a specialist food distributor running a network of depots — to DHL, which had won the business partly on price and planned to serve the whole country from a single new warehouse in Rugby. Within days of the switchover the system buckled: deliveries missed, chicken stranded, and at the peak more than 700 restaurants were shut with nothing to fry. Police in east London publicly asked people to stop reporting it to them. The shutdown was estimated to cost around £1 million a day in lost sales, and KFC's apology became advertising legend — a full-page photo of an empty bucket with the brand's three letters rearranged to read 'FCK'. Within weeks, part of the contract was quietly handed back to Bidvest.
That one week is the whole of 3.3. Operations is the machinery of a business: production methods turn inputs into products (3.3.1); procurement keeps the inputs arriving at the right price, quality and time (3.3.2); quality management decides whether customers come back (3.3.3); and customer service decides what they tell everyone else — KFC's fast, funny, honest apology is widely credited with turning a fiasco into a brand win (3.3.4). The chain is only as strong as its weakest link, and AQA's favourite trick is handing you one operations decision — a supplier switched, a line automated, an inspection stage cut — and asking you to trace it through cost, quality and reputation.
ModelJob versus flow — one perfect thing, or a thousand identical ones
Job production makes one-off products to an individual customer's specification: a wedding cake, a tailored suit, a superyacht. Rolls-Royce builds only about 6,000 cars a year at Goodwood, and almost every one is a unique commission. The economics follow from the method: skilled labour, premium prices, deep customer satisfaction — and slow output with high unit costs, because nothing is standardised and little can be automated.
Flow production is the opposite pole: identical products moving continuously down a line. BMW's Oxford plant can roll out around 1,000 Minis a day; a drinks canning line fills thousands of cans a minute. Unit costs collapse, because expensive machinery is spread across enormous output — the technical economies of scale from 3.1.7 — and consistency is engineered in rather than inspected in. The price is rigidity: the line costs millions to set up, a breakdown stops everything, retooling for a new design is slow and expensive, and endlessly repetitive work drains worker motivation.
Which method wins depends on what the customer is paying for — uniqueness or price — and on volume: flow only pays when there is high, steady demand for the same product. Whichever method a business runs, productivity — output per worker — is the number to watch, because raising it spreads labour cost across more units and cuts the cost of every one.
A joinery employs five craftsmen at £600 a week each and hand-builds 30 bespoke tables a week. Labour cost per table = £3,000 ÷ 30 = £100; productivity = 30 ÷ 5 = 6 tables per worker. A rival installs a £250,000 flow line on which five operatives make 150 identical tables a week: labour per table = £3,000 ÷ 150 = £20, productivity 30 per worker — five times higher. But the rival sells one design, must repay the machinery, and competes at the cheap end of the market, while the joinery charges £900 for a table nobody else can make. Run both calculations, then judge by the market each firm serves — that pairing of arithmetic and judgement is a complete 9-mark answer skeleton.
MechanismProcurement — the cheapest supplier is rarely the cheapest decision
Procurement is sourcing, choosing and managing suppliers, and the selection criteria are the mark scheme: price (including delivery costs), quality (a supplier's defects become your defects), and reliability (late inputs stop everything downstream) — plus payment terms, which decide how long cash stays in your bank before bills fall due. KFC's 2018 switch was rational on price and catastrophic on reliability; the £1-million-a-day lesson is that the bought-in price is only one line of a supplier's true cost.
Stock management is the other half of the leaf. Just in time (JIT) means materials arrive only as production needs them: almost no stock is held, so cash is not tied up in warehouses, storage costs shrink and perishables never rot on a shelf. Its weakness is the absence of any buffer — one late lorry and production stops. Just in case (JIC) holds buffer stock so the business can survive a supply shock or a sudden demand spike, at the price of storage costs, tied-up cash and stock that can spoil, date or go out of fashion.
The 2020s stress-tested the choice in public. The Ever Given blocked the Suez Canal for six days in 2021, holding up an estimated $9 billion of trade a day; the pandemic microchip shortage idled UK car plants running JIT lines. The verdict examiners want is conditional: JIT suits stable demand and reliable, nearby suppliers; JIC suits volatile demand, long supply chains, and any input whose absence shuts the business — as KFC discovered chicken is.
MechanismQuality — inspect failure out, or build success in
Quality means consistently meeting customer expectations at the price charged — a £1 own-label chocolate bar and a £6 artisan bar can both be quality products if each does what its buyer expects. Getting it wrong costs out of all proportion: Samsung's Galaxy Note 7 batteries caught fire in 2016, two recalls failed to fix the fault, and the entire model was scrapped at a cost estimated in the billions of dollars — plus a joke at Samsung's expense in every airport safety announcement for a year.
AQA wants a sharp distinction between two systems. Quality control (QC) inspects output — usually finished output — and rejects defects. It catches faults before customers see them, but it is detection, not prevention: the causes keep producing defects, inspectors' wages keep being paid, and every scrapped unit is money already spent. Quality assurance (QA) builds checking into every stage of production and makes quality every worker's responsibility, aiming to get it right first time so there is nothing left to inspect out. QA costs training, time and culture change up front; it pays back in less waste, fewer returns, and a reputation the business can advertise.
The evaluation examiners reward is a cost comparison — the cost of maintaining quality versus the cost of failure: refunds, replacements, recalls, and the customers who never come back. It is a comparison you can calculate.
A phone-case maker ships 8,000 units a month and 3% reach customers faulty. Each failure costs £45 in refund, return postage and replacement: 0.03 × 8,000 = 240 failures, and 240 × £45 = £10,800 a month — before counting the one-star reviews. A quality-assurance overhaul (staff training, supplier checks, in-line testing) would cost £6,000 a month and cut the failure rate to 0.5%: failures fall to 40, costing 40 × £45 = £1,800, so total quality spending is £7,800. The overhaul saves £3,000 a month and protects the rating. Show both totals, then judge: quality spending is an investment with a measurable return, not a cost to be minimised.
CaseCustomer service — the cheapest marketing a business can buy
Good customer service is specific, and AQA's list is: staff with real product knowledge, speed and efficiency of service, genuine engagement with the customer, and — the part students forget — post-sales service: returns, repairs, helplines and warranties. The benefits compound down a chain: a well-served customer returns, buys again at zero acquisition cost, and recommends. Reviews have industrialised recommendation — one experience now reaches thousands on Trustpilot or Tripadvisor within hours — and the same machinery runs in reverse for poor service, faster.
Timpson, the shoe-repair and key-cutting chain, authorises branch staff to spend up to £500 on the spot to put a customer problem right without asking a manager — a complaint resolved that decisively tends to create a more loyal customer than no complaint at all. Technology raises the service floor too: order tracking, live chat and click-and-collect are customer service delivered by software, at a marginal cost close to zero.
But the honest evaluation is that service is not always the battleground. Ryanair sits near the bottom of UK customer-satisfaction surveys and is still Europe's largest airline by passenger numbers, because on a £30 fare, price wins. Customer service matters most where rivals' products and prices are close — which is exactly where most businesses live, and why KFC bothered to make its apology funny.
CaseOne decision, four leaves — Aldi's operating system
Aldi stocks roughly 1,800 core product lines; a large traditional superstore can carry more than 25,000. That single choice wires all four leaves of 3.3 together. Production-style efficiency: fewer lines mean each product arrives in huge volume, shelf-ready packaging goes straight onto the floor, and a store runs on a fraction of the staff. Procurement: enormous orders per line, concentrated on fewer long-term suppliers, buy rock-bottom input prices — purchasing economies working at full throttle. Quality: with the overwhelming majority of the range own-label, Aldi controls product specifications directly — quality assured into the product with the supplier, not inspected on at the end — and its own-label lines keep beating premium brands in blind-taste awards. Service: deliberately minimal — famously rapid checkouts, no bag-packing, few assistants — because every pound of service removed is a penny off the shelf price, and Aldi's customers have knowingly taken that trade.
When a 3.3 case study lands, run the same scan: What is the production method, and does the volume justify it? What do the supplier relationships trade off — price, quality, reliability? Is quality controlled or assured? What service level fits the price point? Four questions, one judgement: do the operations choices serve the strategy? Aldi's do, in lockstep — which is why it now sets the prices everyone else matches.
VocabularyKey terms the mark scheme pays for
TrapsMisconceptions that cost marks
ExamWhat examiners want
AQA's weightings — AO1 knowledge (35%), AO2 application (35%), AO3 analysis and evaluation (30%) — mean an operations answer that never mentions the case business caps out low, and examiners' reports make exactly that complaint year after year. Operations questions come with the richest case detail on the paper: what the business sells, at what price point, to whom, and how predictable demand is should steer every judgement you make.
The calculations here are unit cost (total costs ÷ output), productivity (output ÷ number of workers) and cost-of-failure comparisons. Write the formula, substitute the numbers, give the answer with its unit — £20 per table, 30 tables per worker — because method marks survive arithmetic slips. On 6-mark analyse questions, chain the consequence all the way to profit or reputation: cheaper supplier chosen → longer delivery distances → late deliveries under JIT → production stops → orders missed → revenue lost and reputation damaged. Each arrow earns; a list of unconnected points does not.
On 9-mark recommendation questions — 'Should the business adopt JIT?', 'Should it switch to flow production?' — argue both options against the case, then give a conditional verdict: 'JIT suits this bakery only if its flour supplier can deliver daily without fail; one missed morning and the shelves are empty.' The top level of the mark scheme asks for a justified judgement rooted in the business's circumstances, not a memorised list of advantages and disadvantages — the case study is not decoration, it is the question.