Excellent!

riftlymedia.com/zipper-mechani…

I swear, every city needs a medina, a cheap mixed-use neighborhood where people can open tiny 2m × 2m shops that specialize in fixing zippers. Or sharpening kitchen knives. Or replacing shoe heels. You can get those services now, of course, but only at ruinous cost, because every shop has to pay thousands of dollars a month in rent on a high street. More tiny kiosks on narrow streets, sez I.

#economics #urbanism #cities #repairability

The Precise Mechanics Behind Why Zippers Fail and What That Reveals About Everyday Product Engineering -

Most zipper failures are a worn slider — a £1 part. You throw away the jacket because nobody told you. The tolerance decision was made in a spreadsheet.

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