Case studies

Read any news report on the housing market, and inevitably it will include facts or figures from the real estate data giant Zillow.com. The company initially set out to solve two key economic frictions in the real estate industry information asymmetry and the principal-agent problem by empowering users to access real-time housing data and eliminating the need for realtors. The company soon realized, however, that American homeowners and buyers were not willing to give up the traditional real estate agent model and changed course. In the end, Zillow decided to join rather than replace the middlemen in the real estate industry.

This case explores the decision of a fast-growing company to expand its distribution network. Financial information is provided in it so students can understand the basic distribution network design covering inbound transportation, outbound transportation, distribution-center operations, and inventory.

California telecommunications company Wireworld is considering an acquisition of Nusantara Communications, a subsidiary of Indonesian conglomerate Bakrie & Brothers. Nusantara had invested $50 million in developing the advanced rural telephone system, which had the potential to provide much-needed telecommunications services to the mostly rural Indonesian population. If if were exported, the worldwide market for this product in the next five years was projected to be in the billions. Should Wireworld acquire this small company halfway around the world? Was it prepared to enter the Indonesian marketplace and beyond?

Students will examine a variety of data, including financial projections, in order to decide whether acquiring Nusantara will add value to Wireworld.

This case is used in Darden's first-year core operations class as part of a module on supply chain management. The Musictoday company provided online retailing services for such clients as the Dave Matthews Band and the Rolling Stones. But the lack of a formal inventory-management process had Musictoday concerned about future stockouts that would result in lost sales. This case covers the basics of safety stock within the context of a periodic review system. It introduces students to the periodic review system and provides them with an opportunity to link the optimal review period with the EOQ concept.

Quality Wireless has received customer complaints about long hold times at its call center. To address these complaints, it put into place certain process changes at its call center. After one month, the company will now decide whether improvement has taken place.

To develop an understanding of process capability and how an improvement can be statistically validated. To understand the “check” phase of the plan-do-check-act cycle of Deming, using basic statistical principles.

Quality Wireless has received customer complaints about long hold times at its call center. To address these complaints, it put into place certain process changes at its call center. After one month, the company will now decide whether improvement has taken place.

To develop an understanding of process capability and how an improvement can be statistically validated. To understand the “check” phase of the plan-do-check-act cycle of Deming, using basic statistical principles.

Assumes an understanding of statistical process control and focuses on highlighting the usefulness of Six Sigma quality. Focuses on the issue of a worn bearing at a tire manufacturer leading to a mean shift (while producing defectives). Shows how a Six Sigma process would quickly detect the mean shift while producing fewer defectives.

To introduce the methodology of statistical process control and to illustrate the value of Six Sigma.