They didn't ask a single question. That's the problem.

My mom ran a landscaping business in the suburbs, and she taught me more about supplier management than I expected.

She managed workers who barely spoke her language, and her rule was dead simple. After giving any assignment, she asked them to repeat it back in their own words. Never "do you understand?", because that always gets a yes. Instead: "Tell me what you are going to do." That is where the gaps showed up.

I use the same tactic with every supplier. After any critical instruction, whether it is a tolerance change, a finish spec, or a packaging revision, I ask them to restate it in their own words, not copy-paste my email back. The number of times their version reveals a misunderstanding that would have become a defective batch is uncomfortable.

Here is what makes this hard to catch. In many supplier teams, especially across Asia, the person who sold you speaks strong English, but the person reading your spec at the factory often does not. And in cultures where saving face matters, asking for clarification can feel like admitting weakness, so instead of asking, they fill in the blanks themselves. Quietly, confidently, and sometimes wrong.

You will never see this on an inspection report. It does not show up as a communication failure, it shows up as a quality failure. You blame the factory, the factory blames your spec, and nobody blames the sentence.

The other half of the fix is even simpler: write like a misread word costs you a production run. Replace "utilize" with "use." Replace "in accordance with" with "follow." Drop every idiom, because "let's circle back" means nothing to someone who learned English from a textbook, while "let's discuss this again on Thursday" is perfectly clear.

This does not replace your contracts or your QC, and you still need both. But contracts catch problems after they happen, while simpler language and a repeat-back prevent them from happening in the first place.

All it takes is one misunderstood email, one assumed spec, one person too shy to say "I do not follow."

Simple words, short sentences, and always ask them to say it back.