Product a is an end item and is made from two units of b and four of c. b is made of two units of d and two of e. c is made of two units of f and two of e. a has a lead time of one week. b, c, and e have lead times of two weeks, and d and f have lead times of three weeks. if 120 units of a are required in week 10, develop the mrp planning schedule, specifying when items are to be ordered and received. there are currently no units of inventory on hand.

World systems manufactures an optical switch that it uses in its final product. world systems incurred the following manufacturing costs when it produced 74 comma 000 units last​ year: ​(click the icon to view the manufacturing​ costs.) another company has offered to sell world systems the switch for $ 13.50 per unit. the world systems prepared an outsourcing decision analysis to show the cost per unit of making the switches versus the cost per unit of buying​ (outsourcing) the switches. ​(click the icon to view the outsourcing decision​ analysis.) world systems needs 86 comma 000 optical switches next year​ (assume same relevant​ range). by outsourcing​ them, world systems can use its idle facilities to manufacture another product that will contribute $ 140 comma 000 to operating​ income, but none of the fixed costs will be avoidable. should world systems make or buy the​ switches? show your analysis.