Vacuum testing
Al these vacuum manufacturers say that they have been testing thier new design for months /years before they launch it, sorry but most of the time its BS.
If they did test them properly then why do they break so fast. I.ve worked in R&D fr a few vacuum company's and the engineers do try and test them but ultimatly its the money men who say , we need it on the market now! screw the problems we will deal with them later.
The days of good product design are long gone, its about sales, a reliable product is useless if it doesn't sell and outsell its competitors. If there is a new product to be launched by one comapny the other will rush like mad to get there one out first.
Its like a vacuum space race.
every day a new product is not launched is millions in lost revenueand that never sits well with Money men.
Luanch first fix later