Green Thumb, a manufacturer of lawn mowers and snowblowers has historically purchased a thousand bearings per week from a local supplier who charges $1.00 per bearing. The purchasing manager has identified another potential source willing to supply the bearings at $0.97 per bearing. Before making his decision, the purchasing manager evaluates the performance of the two suppliers. The local supplier has an average lead time of two weeks and has agreed to deliver the bearings in batches of 2,000. Based on past on-time Performance, the purchasing manager estimates that the lead time has a standard deviation of one week. The new source has an average lead time of six weeks with a standard deviation of four weeks. The new source requires a minimum batch size of 8,000 bearings. Which supplier should the purchasing manager go with (ignore ordering cost and focus on material cost and holding cost when making your decision)? Green Thumb has a holding cost of 25 percent. It currently uses a continuous review policy for managing inventory and aims for a cycle service level of 95 percent. Weekly demand has a mean of 1,000 and a standard deviation of 300.

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
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Green Thumb, a manufacturer of lawn mowers and snowblowers has historically purchased a thousand
bearings per week from a local supplier who charges $1.00 per bearing. The purchasing manager has identified
another potential source willing to supply the bearings at $0.97 per bearing. Before making his decision, the
purchasing manager evaluates the performance of the two suppliers. The local supplier has an average lead
time of two weeks and has agreed to deliver the bearings in batches of 2,000. Based on past on-time
Performance, the purchasing manager estimates that the lead time has a standard deviation of one week. The
new source has an average lead time of six weeks with a standard deviation of four weeks. The new source
requires a minimum batch size of 8,000 bearings. Which supplier should the purchasing manager go with
(ignore ordering cost and focus on material cost and holding cost when making your decision)?
Green Thumb has a holding cost of 25 percent. It currently uses a continuous review policy for managing
inventory and aims for a cycle service level of 95 percent. Weekly demand has a mean of 1,000 and a standard
deviation of 300.
Transcribed Image Text:Green Thumb, a manufacturer of lawn mowers and snowblowers has historically purchased a thousand bearings per week from a local supplier who charges $1.00 per bearing. The purchasing manager has identified another potential source willing to supply the bearings at $0.97 per bearing. Before making his decision, the purchasing manager evaluates the performance of the two suppliers. The local supplier has an average lead time of two weeks and has agreed to deliver the bearings in batches of 2,000. Based on past on-time Performance, the purchasing manager estimates that the lead time has a standard deviation of one week. The new source has an average lead time of six weeks with a standard deviation of four weeks. The new source requires a minimum batch size of 8,000 bearings. Which supplier should the purchasing manager go with (ignore ordering cost and focus on material cost and holding cost when making your decision)? Green Thumb has a holding cost of 25 percent. It currently uses a continuous review policy for managing inventory and aims for a cycle service level of 95 percent. Weekly demand has a mean of 1,000 and a standard deviation of 300.
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