Delta Garments makes Order A, 15,000 T-shirts, for Northline Apparel at an FOB price of USD 3.20 per piece. Northline Apparel pays reliably and on time, and the relationship has run for years without a single dispute. None of that removes a separate risk: how much of Delta Garments' total business depends on Northline Apparel alone. A buyer that pays every invoice on time can still, in one season, cut its own order volume, move part of its sourcing elsewhere, or lose sales itself and simply need fewer T-shirts. If Northline Apparel represents a large share of Delta Garments' total revenue, any one of those ordinary business decisions on Northline Apparel's side becomes a large, sudden loss on Delta Garments' side. This lesson mainly teaches the money flow: how concentration in one buyer or one market turns an ordinary change on the buyer's side into a large financial shock on the factory's side.
You need: Order A's own fixed costing and quantity (Course 1, Course 12), and the general idea of a factory's own order book as a set of buyers, each contributing a share of total revenue.
By the end of this lesson you can:
Not covered here: mapping a factory's own full concentration picture (lesson 6.2), positioning a factory against its own competitors (lesson 6.3), and building a complete portfolio risk and positioning decision tool (lesson 6.4).
| Term | Meaning |
|---|---|
| Buyer concentration | How much of a factory's total revenue comes from one buyer, rather than being spread across many. |
| Market concentration | How much of a factory's total revenue comes from one market, for example one country or one sales channel, rather than several. |
| Revenue share | The percentage of a factory's total revenue that one buyer or one market accounts for. |
| Portfolio risk | The risk that comes from how a factory's business is spread, or not spread, across its buyers and markets, separate from any one buyer's own reliability. |
| Illustrative revenue share | A clearly labelled example percentage used to teach a calculation, never a real disclosed figure for any real company. |
| Order-volume cut | A buyer's own decision to reduce how many pieces it orders, for reasons that may have nothing to do with the factory's performance. |
A buyer's payment record answers one question: does this buyer pay what it owes, on time. It does not answer a second, separate question: what happens to the factory if this buyer's own order volume changes. Northline Apparel has never missed a payment on Order A, but that fact says nothing about whether Northline Apparel might, for reasons entirely its own, place fewer orders next season. The size of the risk this creates for Delta Garments depends only on one number: how much of Delta Garments' total revenue Northline Apparel represents. A buyer providing 10% of total revenue can cut its own orders sharply and the factory absorbs the loss. A buyer providing 65% of total revenue doing the same thing can threaten the factory's own survival, even though the buyer itself did nothing wrong.
| What can differ | The shapes you will meet | Why it matters to you |
|---|---|---|
| Buyer concentration | An export factory serving mainly one large buyer, like Northline Apparel's own illustrative share of Delta Garments' revenue, differs sharply from a factory spreading similar volume across five or six buyers of comparable size. | The higher one buyer's revenue share, the more a single decision on that buyer's side can shrink total factory revenue at once. |
| Market concentration | A factory selling only to export buyers in one region carries a different risk from one selling into both export and domestic markets, like Delta Garments' own sales to Cedar & Co. alongside Northline Apparel. | A shock specific to one market, a slowdown, a new tariff, a currency move, reaches only the revenue tied to that market, not revenue in a different market. |
| Business model behind the order | An MTO export order like Order A is priced and placed order by order, so a buyer can simply stop placing new orders with little notice. An MTS domestic order, built against a standing forecast, usually gives more warning before volume falls. | An MTO relationship can lose volume faster than an MTS relationship, even at the same revenue share, because there is no standing forecast to slow the change. |
| Reason for a buyer's own order cut | A buyer may cut orders because its own retail sales fell, because it is diversifying its own sourcing, or because it is testing another factory. None of these reasons involves any fault by the factory. | A factory cannot prevent a buyer's own business decision; it can only control how much of its own revenue depends on that one decision. |
Delta Garments' illustrative total revenue across all buyers is USD 1,000,000. Northline Apparel, the buyer behind Order A, represents an illustrative 65% of that figure, USD 650,000, built up across Order A and several similar orders placed through the year. The remaining 35% is spread across several smaller export and domestic buyers, including Cedar & Co. Northline Apparel has never given Delta Garments any reason to doubt its reliability. But Northline Apparel's own retail performance, its own sourcing strategy, and its own seasonal demand are all decisions made entirely on Northline Apparel's side, and none of them are visible or controllable from inside Delta Garments.
The worked numberA buyer that has never missed a payment and has ordered from the same factory for years feels safe, and in one sense it is: the payment risk is low. But payment reliability and revenue concentration are two different questions, and a factory that only tracks the first can be caught entirely unprepared by the second. Northline Apparel's own long, reliable history with Delta Garments says nothing about what happens the season Northline Apparel decides, for its own reasons, to place a smaller order. A factory that never calculates its own buyer's revenue share discovers the size of its exposure only after the order cut has already happened, at exactly the point when there is no time left to plan for it.
Delta Garments makes T-shirts for Northline Apparel, a buyer that has always paid on time. That is not the whole picture. If Northline Apparel provides most of Delta Garments' total income, then any change on Northline Apparel's own side, a smaller order, a move to another factory, a slow season for Northline Apparel itself, becomes a big problem for Delta Garments too, even though Northline Apparel did nothing wrong. The real risk is not whether a buyer pays reliably; it is how much of the factory's total income depends on that one buyer, or on one market, instead of being spread across several. A factory that depends on one buyer for most of its income has very little room if that one buyer changes its plans.
Karim, Delta Garments' production manager, mentions to the factory owner that a buyer visiting from Northline Apparel said, during a routine plant visit, that Northline Apparel is "reviewing its supplier list this year," without saying what that means for Delta Garments specifically. Nothing in the comment is a cancellation or even a firm signal of reduced volume. The owner asks Mona, the merchandiser, to check exactly how exposed Delta Garments would be if Northline Apparel's own review did lead to a smaller order.
Here is the note Mona prepares:
Should the owner treat this as an urgent problem to act on now, or as a routine remark to note and monitor? Decide before opening the answer.
The owner should treat it as a serious signal worth acting on, precisely because Delta Garments' own concentration in Northline Apparel is already high. Two facts decide this together.
First, nothing has actually been cancelled or reduced yet. Northline Apparel's comment was general, and reacting as though an order has already been lost would be premature.
Second, Northline Apparel's illustrative 65% share of Delta Garments' total revenue means the factory has very little room if that review does lead to a smaller order. An illustrative 30% cut on Northline Apparel's side alone would remove about 19.5% of Delta Garments' total revenue, exactly the kind of concentrated exposure lesson 6.2 teaches how to map in full.
The size of Northline Apparel's own revenue share is what turns an ordinary, non-committal comment into something worth acting on now, not the comment itself.
Framed on Delta Garments' own illustrative revenue figures, a 30% cut to Northline Apparel's own order volume removes USD 195,000 of total revenue in one season, before Delta Garments has any chance to replace it with new business.
Order A alone is a small fraction of Delta Garments' total revenue; it is Northline Apparel's full illustrative share across every order it places that creates the exposure this lesson describes.
Open the Portfolio risk and positioning tool workbook linked below. Its "Customer concentration" sheet lists each buyer, its illustrative revenue share, and calculates the revenue at risk from an illustrative order-volume cut, the calculation this lesson worked through for Northline Apparel. Fill in the yellow "Your factory" column with your own buyers and illustrative shares for practice.
[Download the Portfolio risk and positioning tool](../../templates/T16-C06-portfolio-risk-positioning.xlsx)
1. Northline Apparel has never missed a payment to Delta Garments. Why does this lesson still call the relationship a real business risk?
2. Which factory carries greater portfolio risk from buyer concentration, all else equal?
3. A different factory has illustrative revenue of USD 2,000,000, with one buyer at an illustrative 40% share. That buyer cuts its own order volume by 25%. What revenue is lost, and what share does that represent?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Buyer concentration | تركّز المشترين | Concentration des acheteurs | Alıcı yoğunlaşması | How much of a factory's total revenue comes from one buyer, rather than being spread across many. |
| Market concentration | تركّز الأسواق | Concentration des marchés | Pazar yoğunlaşması | How much of a factory's total revenue comes from one market, for example one country or one sales channel, rather than several. |
| Revenue share | حصة الإيراد | Part de chiffre d'affaires | Gelir payı | The percentage of a factory's total revenue that one buyer or one market accounts for. |
| Portfolio risk | مخاطر المحفظة | Risque de portefeuille | Portföy riski | The risk that comes from how a factory's business is spread, or not spread, across its buyers and markets, separate from any one buyer's own reliability. |
| Illustrative revenue share | حصة إيراد افتراضية | Part de chiffre d'affaires illustrative | Gösterge niteliğinde gelir payı | A clearly labelled example percentage used to teach a calculation, never a real disclosed figure for any real company. |
| Order-volume cut | خفض حجم الطلبية | Réduction du volume de commande | Sipariş hacmi kesintisi | A buyer's own decision to reduce how many pieces it orders, for reasons that may have nothing to do with the factory's performance. |
You now know why depending heavily on one buyer or one market is a real business risk, even when that buyer pays reliably. The next lesson teaches how to map exactly how concentrated a factory's own business already is, across buyers and across markets. Back to the course map