The store is open every day of the week. It opens at 10 AM in the morning and closes at 2 AM the following morning. Assume each driver always drives their own vehicle. All orders are taken over the phone (remember, it's 1986). Pizza is the only type of food sold. Data shows 15 percent of the deliveries were late (i.e., free pizzas). A small sample of delivery times have been collected by the store's manager. The statistics from this sample are: Mean 25.68 minutes Standard Deviation 4.45 minutes Maximum 39.5 minutes Minimum 18 minutes Median 25.23 minutes

The manager has provided the following estimates of the daily number of deliveries.

Mon Tue Wed Thu Fri Sat Sun

200 250 250 300 400 500 250

After reviewing the overview and background information, the respective readings and videos, and the additional information from the customer, you and your team have a discussion with your team's Black Belt John Processguru. Based on the daily estimates of the number of deliveries, the percentage of deliveries that were lost, and 4 process steps

(making pizzas, cooking pizzas, packaging pizzas, and delivering pizzas - consider these are

like process steps), for the overall / combined total 6 Sigma Metrics.

Here are the 6 Sigma Metrics you will be calculating:

Calculate the DPU

Estimate the RTY

Calculate the overall RTY

Calculate the overall DPU

Using that information and a conversion table, provide the

o Short-Term Six Sigma

o Long-Term Six Sigma

o DPMO

NOTES:

If a pizza is made incorrectly (defect), an entire new pizza is made.

If a pizza delivery is late (defect), then the pizza is free.