This page teaches a merchandiser or planner how to turn one order's bill of materials into a full material requirement list: every material the order needs, in its own quantity and unit. It is for anyone releasing purchase orders for an order's fabric and trims together, and it builds on Course 1's supplier qualification skill. It mainly teaches the information flow: turning the bill of materials into a material requirement list, without losing or duplicating a line.
At work, a planner cannot release a fabric purchase order today and remember the trims later. Every material on the bill of materials, fabric, labels, thread, buttons and zips, has its own supplier and its own lead time, and each must be ordered in the right quantity for the same order quantity. Without a full material requirement list, a planner orders some materials correctly and forgets others, and the cutting room later finds fabric but no labels, or thread but no fabric.
Order A's bill of materials already fixes its fabric figure, 0.205 kg per piece for 15,000 pieces, a figure this course reuses rather than recalculating. The new skill here is reading every line of a bill of materials, not just the fabric line, and turning each one into its own requirement, in its own unit, ready for its own purchase order.
You need: Course 1's supplier qualification skill (T13-C01), and it helps to know how a fabric total is calculated from a per-piece figure and an order quantity, covered in Track 3's fabric calculations course.
By the end of this lesson you can:
Not covered here: how a bill of materials itself is built for costing (Track 5, Course 5), combining two orders' requirements for a shared fabric (Lesson 13.3.2), adding lead time and safety stock to a requirement (Lesson 13.3.3).
| Term | Meaning |
|---|---|
| Bill of materials | The list of every material and cost component in a garment, with its cost, used to build up the FOB price. |
| Fabric consumption | The amount of fabric (by weight or length) one garment piece uses, the basis for calculating an order's total fabric requirement. |
| Total fabric requirement | The full quantity of fabric an order needs, calculated from per-piece consumption times order quantity. |
| Material requirement list | The full list of every material an order needs, each in its own unit and quantity, built line by line from the order's bill of materials and its order quantity. |
An order's bill of materials names every material the garment uses and its per-piece figure; a material requirement list takes each of those per-piece figures and multiplies it by the order quantity, one line at a time, so every material ends up with its own total ready for its own purchase order. Order A's fabric line already gives 0.205 kg per piece; multiplied by 15,000 pieces it gives the order's already-fixed 3,075 kg total. Every other line on the bill of materials, a woven label, a care label, sewing thread, follows the same multiplication, each in its own unit: pieces for labels, metres for thread. No material requirement list is complete while even one bill-of-materials line has not yet been turned into its own total.
| What can differ | The shapes you meet | Why it matters |
|---|---|---|
| Number of bill-of-materials lines | A basic T-shirt like Order A may carry four or five lines; a jacket or a jeans order carries many more, zips, rivets, pocket bags, interlining | More lines mean more separate purchase orders to release, each with its own supplier and lead time |
| Unit per line | Fabric by weight or length, labels and buttons by piece, thread and elastic by metre, dyes and chemicals by weight for a mill's own use | Multiplying a per-piece figure by the wrong order quantity or in the wrong unit produces a material requirement that cannot be ordered correctly |
| Export MTO order | Delta Garments builds Order A's material requirement list once, against Northline Apparel's confirmed 15,000-piece quantity | A Make to Order quantity is fixed and known before materials are ordered, so the list is built once against a firm number |
| Domestic MTS order | A domestic brand ordering to its own forecast builds the same list against a forecast quantity that may later change | A Make to Stock quantity can move, so its material requirement list may need rebuilding if the forecast is revised |
| Related product families | Socks and hosiery (yarn plus a smaller trim set), home-textile bedding (fabric plus thread and packaging, no labels sewn into the seam the same way) | The line-by-line method carries over outside apparel, though which trims appear on the list changes by product |
Delta Garments already confirmed Order A's fabric total, 3,075 kg from Rowad Knits, in Track 3's fabric calculations course. Before its planner can release every purchase order at once, the same order's trims, sourced from Trimco, must also be turned into their own totals from the same bill of materials: a woven label and a care label, one of each per piece, and sewing thread, 380 m per 100 pieces. Delta Garments cannot release the fabric purchase order today and the trim purchase orders next week without risking a mismatch between the two, so both are built from the same bill of materials at the same time.
The worked numberOrder A's own fixed figures: 0.205 kg of fabric per piece multiplied by 15,000 pieces.
Order A's bill of materials also fixes one woven label and one care label per piece.
Order A's bill of materials fixes sewing thread at 380 m per 100 pieces.
Order A's material requirement list therefore reads: 3,075 kg of fabric, 15,000 woven labels, 15,000 care labels, and 57,000 m of sewing thread, each worked out live on this course's material requirement planner rather than typed in by hand.
A common mistake is calculating an order's fabric total carefully, as Order A's 3,075 kg already is, and then ordering trims later from memory or from a rough estimate rather than from the same bill of materials. This happens because fabric is usually the largest cost line and gets the planner's first attention, while a label or a spool of thread looks too small to need the same discipline. A cutting room that has fabric but no labels or thread on the day cutting is due to start cannot proceed, whatever quantity of fabric has already arrived.
This lesson shows how to turn a garment's full ingredient list into a shopping list with real quantities. The ingredient list, the bill of materials, names the fabric and every small item like labels and thread. For each one, the amount used on a single piece is multiplied by how many pieces are being made. This gives a full list where every material has its own total, ready to be ordered. Skipping this for the small items, and only working out the fabric carefully, is a common way for a factory to run short of something small on the day cutting is meant to start.
Mona, the merchandiser at Delta Garments, has Order A's bill of materials and its confirmed 15,000-piece quantity from Northline Apparel. Before releasing any purchase order, she checks that every line on the bill of materials has its own material requirement calculated, not just the fabric line.
Has Mona built a full material requirement list, or only calculated the fabric total?
Mona has calculated Order A's full material requirement list. Fabric: 0.205 kg per piece times 15,000 pieces gives 3,075 kg. Woven and care labels: 1 per piece times 15,000 pieces gives 15,000 of each. Sewing thread: 380 m per 100 pieces times 150 (15,000 pieces divided by 100) gives 57,000 m. Because every line on the bill of materials has its own total, Mona can release the fabric purchase order to Rowad Knits and the trim purchase orders to Trimco at the same time, with no line left uncalculated.
A material requirement list that skips a trim line does not usually threaten the whole order, since trims cost far less than fabric, but it still carries a real cost in delay. If Mona released only the fabric purchase order and forgot to calculate the thread requirement, Trimco would receive a late or rushed order for 57,000 m of sewing thread, which could push the thread's own delivery past the date cutting is due to start.
The sewing thread requirement, in metres, that must reach Trimco before cutting can safely begin: 380 m per 100 pieces times 150 (15,000 pieces divided by 100).
A cutting room with fabric but no thread cannot proceed to sewing, so the whole order's 16-week timeline can slip by however many days the missed trim purchase order costs to correct, a cost this lesson's method, checking every bill-of-materials line before releasing any purchase order, avoids entirely.
The Material requirement planner (this course's workbook) holds the "Bill of Materials to Requirement" sheet, which reads each bill-of-materials line's per-piece or per-hundred-pieces figure and the order quantity, then calculates every material's own total automatically as a live formula.
| Question | Fabric (filled in) | Woven label (filled in) | Sewing thread (filled in) | Your material |
|---|---|---|---|---|
| Unit | kg | piece | metre | |
| Per-piece or per-100-pieces figure | 0.205 kg | 1 piece | 380 m | |
| Order quantity | 15,000 pieces | 15,000 pieces | 15,000 pieces | |
| Total material requirement | 3,075 kg | 15,000 pieces | 57,000 m |
Download the Material requirement planner from the course page and fill in your own order's bill of materials in the fourth column.
1. What is a material requirement list, and how does it differ from a bill of materials?
2. Order A's bill of materials fixes sewing thread at 380 m per 100 pieces. What is the total thread requirement for the full 15,000-piece order?
3. A different order of 8,000 pieces uses the same bill of materials as Order A, with a woven label at 1 per piece. What is that order's label requirement?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Bill of materials | قائمة المواد | Nomenclature | Malzeme listesi | The list of every material and cost component in a garment, with its cost, used to build up the FOB price. |
| Fabric consumption | استهلاك القماش | Consommation de tissu | Kumaş tüketimi | The amount of fabric (by weight or length) one garment piece uses, the basis for calculating an order's total fabric requirement. |
| Total fabric requirement | إجمالي احتياج القماش | Besoin total en tissu | Toplam kumaş ihtiyacı | The full quantity of fabric an order needs, calculated from per-piece consumption times order quantity. |
| Material requirement list | قائمة احتياج المواد | Liste des besoins en matières | Malzeme ihtiyaç listesi | The full list of every material an order needs, each in its own unit and quantity, built line by line from the order's bill of materials and its order quantity. |
You now know how to turn one order's bill of materials into a full material requirement list. The next lesson looks at what happens when more than one order shares the same fabric, and how the two orders' requirements are added together without double-counting either one. Back to the course map