O&P Workshop Stock Control: Stop Margin Leaking from Your Materials Shelf
4 min reading time
Offcuts, expired resins and rush freight quietly eat into every device. A practical guide to stock counts, ABC analysis, minimum levels and better thermoplastic sheet yield for O&P workshops.
In most O&P workshops, the materials shelf is where good intentions meet real life. Sheets are cut from the middle, offcuts pile up in a corner, plaster runs out on a busy morning and a rush order costs double in freight. None of these feel like big problems on their own – but together they quietly take margin from every device you make. This guide shows how to bring materials under control with simple habits that any clinic can start this month.
General business information for clinic owners and workshop managers. Always follow manufacturers' instructions for storing and processing materials.
Why materials control is a profit issue
Every sheet of polypropylene, every block of EVA and every roll of plaster bandage is cash sitting on a shelf. Too much stock ties up money you could use elsewhere; too little leads to delays, rushed purchases and unhappy patients. Waste – offcuts that are too small to use, expired resins, damaged sheets – is money you paid for and threw away. Getting this right improves margin without asking patients to pay more.
Step 1: Count what you have
Do a full stock count of your materials: thermoplastics, foams and top covers, lamination supplies, casting supplies, adhesives and fastenings. Record the quantity, the date received where you know it, and any items that are damaged or past their use-by date. It is rarely a pleasant afternoon, but most owners find stock they had forgotten about – and items they keep re-ordering unnecessarily.
Step 2: Sort stock by value with ABC analysis
Not every item deserves the same attention. ABC inventory analysis groups items by how much they contribute to the value of your stock: a small number of "A" items usually account for a large share of value, while many "C" items are low value. In an O&P workshop, your A items might be thermoplastic sheet, carbon and resin, liners and componentry; C items might be rivets, Velcro and sandpaper.
Manage A items tightly – count them monthly, keep minimum and maximum levels, and review usage against devices made. Manage C items simply – keep a sensible buffer and re-order in bulk.
Step 3: Set minimum levels and a re-order routine
For each A and B item, work out how much you use in a typical month and how long a delivery takes. Your minimum level should cover usage during the delivery time plus a safety margin. When stock hits the minimum, it gets re-ordered – by a named person, on a fixed day each week. A laminated card on the shelf showing the minimum level is often all the system you need.
Ordering on a routine rather than in a panic also lets you plan freight: grouping orders and choosing sea freight for bulky, non-urgent materials, and air only when it is genuinely needed.
Step 4: Improve sheet yield
Thermoplastic sheet is often the biggest single materials cost in orthotics. Three habits make a real difference:
Nest your templates. Before cutting, lay out templates for several jobs together and mark them as closely as possible, working from one edge rather than the centre of the sheet.
Keep a usable-offcut rack. Store large offcuts flat, labelled by material and thickness, and check the rack before cutting a new sheet. Smaller offcuts can often serve for paediatric devices, test pieces or additions.
Heat consistently. Uneven heating causes thinning, poor drape and devices that have to be re-formed. A properly maintained oven – such as a compact Qaadir Q150 Infrared Oven for smaller sheets – and a reliable vacuum former and pump help get it right first time.
Step 5: Store materials properly
Damaged materials are pure waste. Store sheets flat and away from direct sun and heat, keep resins and adhesives within their recommended temperature range, and rotate stock so the oldest is used first. Keep the plaster room dry and organised so bandages and powder don't spoil.
Step 6: Link materials to your cost per device
Once you know what each device type consumes, put that figure into your costing. Our guide to calculating the true cost of an O&P device shows how materials fit alongside labour and overheads, and our guide to pricing with confidence shows how to turn those numbers into fees.
Work out your own numbers
To see what waste is costing you, weigh or measure the offcuts you throw away for one month, and value them at what you paid for the sheet. Add the value of anything written off as expired or damaged, and any extra freight paid for urgent orders. That total is margin you can win back without seeing a single extra patient.
Start this month
Pick one afternoon this week to count your top ten materials by value, set a minimum level for each, and name the person responsible for re-ordering. Next week, start the usable-offcut rack. In a month, compare your waste figure with the month before.
Qaadir holds stock in the RAKEZ free zone with air and sea options, and every order is quoted. Browse our thermoplastics range or email support@qaadir.me to set up a regular materials order for your workshop.
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