Consider a product that needs to go through three working stations $(1->2->3)$ to be

completed. Here is workflow chart of the three stations between $9-10$ am on a particular

day under two working systems. The solid$/$dashed lines indicate that the corresponding

workstation is busy$/$idle$.$ According to this chart, Figure and represent a push

and a pull system, respectively. The throughput time of the first product in Figure $($a$)$ is

that in Figure $($b$).$

b; a; shorter than

a; b; longer than

$a$; b; equal to

None of the above