Technology sets .A production plan is an input bundle and an output level;( X,,..., Xng y) ◆ A production plan is feasib|e(可行)if y≤f(X n The collection of all feasible production plans is the production set(生产集)or technology set(技术集)Technology Sets ◆ A production plan is an input bundle and an output level; (x1 , … , xn , y). ◆ A production plan is feasible （可行）if ◆ The collection of all feasible production plans is the production set (生产集) or technology set （技术集）. y  f(x , ,xn) 1 