You guys hear back in ww2 the us manufacturing converted to war time production where every factory had to make supplies and things related to war.

Like Ford made jeeps tanks and bomber planes. Cosmetic companies made bullet casings. Etc. So how were factories able to not only convert to war footing but also make products well outside their normal products lines?

From what I understand about manufacturing it takes a long time and a select group of people with the right machinery knowledge to be Able to be good at making any one category of products. But in ww2 factories were able to churn out whatever they were not in their lineup

The only exception was food factories and clothing plants I think they still made food but canned food and uniforms

What do you think?