We Trusted Our Subcontractor with AED 200K in Raw Materials. We Never Verified Returns.
A client in Al Quoz subcontracted 40% of their production to an external workshop. Every month, they sent AED 200K in raw materials. Nobody verified whether the finished quantity matched what the raw materials should have produced.
What Happened
We had a client in Al Quoz who subcontracted 40% of their production to an external workshop. Every month, they sent AED 200K in raw materials to this vendor. Every month, the vendor returned finished goods. Nobody verified whether the finished quantity matched what the raw materials should have produced. They trusted the vendor. The vendor knew they did not verify. After 18 months of this arrangement, the client switched to ERPNext and configured the subcontracting module. The first month of tracked data revealed a pattern. They sent 1,000 kg of material with an expected yield of 92%. They should have received 920 kg of finished goods. They received 870 kg. A 5.4% gap. Every single month. Over 18 months, that 5.4% gap on AED 200K monthly material value represented AED 10,800 per month in unaccounted raw material. AED 194,400 over the full period. Not stolen. Just unverified. The vendor may have had legitimate scrap. Or they may have used excess material on other clients' orders. Without tracking, both explanations are equally plausible and equally untestable.
What It Cost Beyond the Material
The AED 194K in material was the direct cost. The indirect cost was worse. Without yield tracking, the client's production cost per unit was calculated using theoretical yields. They priced their finished goods assuming 92% yield. The actual yield was 86.6%. Every unit they sold was priced on a cost basis that was 5.4% too low. On a 25% gross margin, a 5.4% cost understatement means their real margin was closer to 20%. They were leaving 5 points of margin on the table across their entire product line. The pricing error compounded across every quotation, every contract, and every customer. Their "most profitable" product line was actually their thinnest because it was the one with the highest subcontracting ratio.
Trust Is Not a Supply Chain Strategy
Verification does not mean you think the vendor is dishonest. It means you have a system that makes honesty verifiable. ERPNext's subcontracting workflow tracks the exact materials sent to each vendor, the expected output based on BOM specifications, the actual output returned, and the variance between expected and actual. When finished goods arrive, the receiving entry matches against the supply entry. Gaps are flagged immediately. Not at quarter end. Not at audit. Immediately. An enterprise implementation configures per vendor yield expectations based on your BOM and historical data. The system learns each vendor's actual yield rate over time. After 3 months of data, you know that Vendor A returns 91% while Vendor B returns 88%. That data informs which vendor gets which jobs, and it gives you evidence for renegotiating pricing or terms.
What to Avoid
Do not wait 18 months to start tracking. Every month without subcontracting data is a month of unverified yield, unverified cost, and pricing based on assumptions. Do not assume the vendor's count is correct. They have their own waste, their own measurement methods, and their own incentives. Your count and their count should reconcile. When they do not, the conversation starts from data, not accusation. The professional tier at AED 1,999 per month includes the subcontracting module that tracks material dispatch, expected returns, actual returns, and variance per vendor per batch. If you currently subcontract any portion of your production, ask yourself this: do you know the exact yield rate of each vendor for each product over the last 6 months? If the answer involves the word "roughly" or "approximately," the gap between what you think you are paying and what you are actually paying could be six figures.
Frequently Asked Questions
Can ERPNext track multiple subcontractors for the same product?
Yes. Each subcontractor has their own supplier record with yield history. You can send the same product to different vendors and compare their yield rates, delivery times, and quality records side by side.
How does the system handle scrap and waste from subcontractors?
ERPNext records expected yield versus actual yield for every subcontracting order. The difference is classified as scrap. Over time, the system builds a scrap percentage per vendor per product, which you can use in cost calculations and vendor negotiations.
What if the subcontractor returns goods in multiple batches?
ERPNext supports partial receipts against subcontracting orders. Each return records the quantity received, and the system tracks the remaining balance. The order stays open until all expected finished goods are received or the balance is written off.
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