The demand for subassembly S is 100 units in week 7. Each unit of S requires 2 units of T and 2 units of U. Each unit of T requires 2 units of V, 1 unit of W, and 2 units of X. Finally, each unit of U requires 2 units of Y and 3 units of Z. One firm manufactures all items. It takes 2 weeks to make S, 2 weeks to make T, 2 weeks to make U, 1 week to make V, 2 weeks to make W, 1 week to make X, 2 weeks to make Y, and 2 weeks to make Z. a) Choose the correct product structure. A. Level 0 S U(2) 1 2 V(2) Y(2) T(2) Z(3) W (1) X (2) Level 0 S (2) (2) 1 B. B. Level S 0 V(2) U(2) 1 Z U Y S T W V 2 T (2) W (1) X (2) Y(2) Z (3) Level 0 1 S U(2) T(2) 2 V (2) W (1) X (2) Y (2) Z (3) C. W T S Y U Z D. > W W T Y U N S 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4 5 6 7 Time in weeks Time in weeks Time in weeks Time in weeks 2 Y(2) W (1) X (2) U(2) Z (3) b) Choose the correct time-phased product structure. A. > W T S Y U N