Assignment task: The Company's manager proposes three operation plans:
a. Plant X operates 10 days, plant Y operates 10 days, and plant Z operates 10 days.
b. Plant X operates O day, plant Y operates 18 days, and plant Z operates 16 days.
c. Plant X operates 10 days, plant Y operates 15 days, and plant Z operates 15 days.
Which operation plan is infeasible (cannot satisfy the demand for model 1 and model 2)? Why?
Which operation plan is the best among the three? Why?