Early supply chain management systems were based on$$ a$($n$)\_\_\_\_\_\_\_\_$ in which production master schedules were based on forecasts of demand for products.

Question content area bottom

Part $1$

A$.$

$$slide$-$based model

B$.$

CO$($customer order$)$ trigger system

C$.$

enterprise order system

D$.$

push$-$based model

E$.$

pull$-$based model