9. Which of the following statements about 14. All of the following may contribute to an unrealistic master production schedule EXCEPT planning BOM is not true? a. the major challenge in constructing planning b. common parts have to remain uncommitted c. sufficient safety stock has to be carried for d. planning BOM reduces the number of items BOM is to separate the common parts from a. inaccurate lead time b. inaccurate sales forecasts c. incorrect yield estimates d. incorrect bills