The demand for subassembly S is 100 units in week 7. Each unit of S requires 1 unit of T and 2 units of U. Each unit of T requires 1 unit of V, 2 units of W, and 1 unit of X. Finally, each unit of U requires 2 units of Y and 3 units of Z. One firm manufacturers all items. It takes 2 weeks to make S, 1 week to make T, 2 weeks to
make U, 2 weeks to make V, 3 weeks to make W, 1 week to make X, 2 weeks to make Y, and 1 week to make Z.
a. Construct a product structure. identify all levels, parents, and components.
b. Prepare a time-phased product structure.
c. Construct a gross material requirements plan.