$19.$ To analyze a certain process, which of the following tools is the most unlikely to be used?

A$.$ BCG $($Boston Consulting Group$)$ Matrix B$.$ Flow chart

C$.$ Bottleneck analysis D$.$ Gantt chart E$.$ CPM

$20.$ Which of the following is a measure of efficiency?

A$.$ Days of inventory

B$.$ Capacity Used$/$Total Capacity

C$.$ Output$/$Input

D$.$ All of the above

E$.$ None of the above

$21.$ Considering a process with variable input and no buffer, which of the following will happen $($compared with the $$no variability$$ case$)?$

A$.$ Lower throughput rate B$.$ More capacity utilization

C$.$ Revenue remains unchanged D$.$ Lower inventory

E$.$ None of the above