Each R requires 4 of component S; each S requires 3 of part T. The lead time for assembly of R is 1 week. The lead time for the manufacture of S is 2 weeks. The lead time for the procurement of T is 6 weeks. The cumulative lead time for R is __________ weeks.
A) 6
B) 9
C) 12
D) 18
E) 28

Question

Quizplus · Accepted Answer

The cumulative lead time for R includes the lead time for assembling R itself (1 week), the time to manufacture S (2 weeks), and the time to procure T (6 weeks). Since each S requires 3 Ts, and the lead time for T is the longest and occurs first in the production process, it sets the initial timeline. The total is 1 week (for R) + 2 weeks (for S) + 6 weeks (for T) = 9 weeks.

Each R Requires 4 of Component S; Each S Requires