Quality Fade Control System
Preserve batch references and trace every unit back to its order
- Difficulty
- Advanced
- Time to result
- ~ongoing to results
- Steps
- 5
- Confidence
- 99%
Repeat success can create complacency while materials or processes change. The guest describes ‘quality fade’ as a gradual reduction in quality and recommends retaining a labelled reference sample from every order. Store those samples, then periodically select units from separated batches and send them for comparative product testing. Differences in composition, construction, or performance can reveal drift that routine familiarity misses. Continue inspecting every order rather than relaxing controls after a long supplier relationship. Add the purchase-order number to the product label so returns can be traced to a production batch. If stock is distributed across warehouses, marketplaces, or countries, that identifier helps isolate the affected units instead of treating all inventory as suspect. The system combines ongoing prevention, longitudinal detection, and post-sale containment.
Origin
Extracted from The Foundr Podcast
Core principles
- 01A reliable history does not guarantee the next batch
- 02Samples from different orders make gradual change visible
- 03Random cross-batch testing reduces convenient comparisons
- 04A purchase-order identifier limits the scope of recalls and investigation
How to run it
- 1
Inspect every order
Keep the agreed inspection and testing controls active for repeat production. Do not reduce them only because prior batches passed.
Watch out Familiarity with a supplier can hide changes in materials or process.
- 2
Archive batch samples
Retain a representative sample from each production order. Label it with the order number and date, then store it consistently.
Pro tip Preserve the approved reference as well as later batch samples.
Watch out Poor storage can create differences unrelated to manufacturing.
- 3
Compare distant batches
Randomly select samples from earlier and later orders for side-by-side or third-party testing. Look for material, construction, or performance changes.
Pro tip Comparing non-adjacent orders may make gradual drift easier to detect.
- 4
Trace every unit
Print or attach the purchase-order number on the product label. Capture that identifier when processing returns or complaints.
Watch out A batch identifier must remain legible through the product's normal life.
- 5
Contain the affected batch
Use return evidence and order identifiers to identify stock from the suspect run. Pull, test, or investigate that batch without automatically mixing it with unaffected inventory.
Pro tip Map order numbers to every warehouse and channel where units were sent.
Watch out Safety issues may require broader action and specialist advice than the transcript's commercial example covers.
In the wild
The guest recounts repeat orders of military boots followed by widespread sole splitting after routine vigilance had relaxed. He says the specified rubber content was 40 percent but may have fallen to roughly 32 percent. The supplier accepted responsibility and remade the goods, but the guest says testing at source could have caught the issue before shipment.
→ The costly failure became the basis for inspecting every order and retaining comparable batch samples.
The guest explains that stock from one order may sit across Amazon, US warehouses, China, and other markets. Putting the purchase-order number on each label lets the business identify which production batch generated returns and pull that stock rather than guessing across the entire inventory.
→ Returns can be tied to a batch and the response can target the affected production run.
Common mistakes
Relaxing after repeat success
A history of good orders does not prove that materials and processes remain unchanged.
Keeping unlabelled samples
A retained unit has little longitudinal value if it cannot be tied to a specific order and date.
Shipping without batch identity
Without an order number on the product, distributed inventory and returns are harder to isolate accurately.
Is it for you?
Best for
Brands placing repeat orders for products whose materials or performance can drift over time.
Not ideal for
One-off products without repeat batches, although ordinary inspection may still be necessary.
From the transcript
“You should be inspecting every order.”
“I always put the purchase order number uh on the label of the product.”
From the episode
585: The $100K Mistake Most Founders Make with Manufacturers (and How to Avoid It) (Best of Foundr)