Assume product Z is made of two nits of A and four units of B. A is made of three units of C and four units of D. D is made of two units of E.
The lead-time for purchase or fabrication of each unit to final assembly: Z takes two weeks; A, B, C, and D takes one week each; and E takes three weeks.
Fifty units are required in period 10 (assume 0 current inventory).
A, Draw a product structure tree.
B, Using a lot for lot ordering policy, develop an MRP planning schedule showing gross and net requirements, order release and order receipt dates.