Institute for Supply Management (ISM) surveys purchasing managers in the manufacture sector every month. The survey includes questions on new orders, production, employment, supplier delivery, inventory, costumers' inventory, prices, new export orders, backlog of orders, and imports.
PMI= 0.2*new orders + 0.2*production + 0.2*employment + 0.2*supplier delivery + 0.2*inventory
ISM PMI is a very important economic indicator. It not only represents the conditions of the US economy, but also the global demand.
US ISM Manufacturing PMI2021-1161.10