Contracting for more chips than you can make isn't a fun situation to find yourself in, nobody is doing it for profit (it's actually quite expensive in time, money, and reputation to litigate the fallout).
It happens due to failed estimates (we thought we could start production in January but we couldn't figure out the process until March), upstream supply failures (our surface-mount supplier can't get us enough capacitors), or global market conditions (concrete and steel unexpectedly doubled in price and we can't afford to build the whole building this year).
It happens all the time and isn't your fault (but it is your responsibility to handle).
It happens due to failed estimates (we thought we could start production in January but we couldn't figure out the process until March), upstream supply failures (our surface-mount supplier can't get us enough capacitors), or global market conditions (concrete and steel unexpectedly doubled in price and we can't afford to build the whole building this year).
It happens all the time and isn't your fault (but it is your responsibility to handle).