A Run Chart  

A Box Plot  

Type your solution in the answer box and be sure to answer all parts of the question. A manufacturer of automotive transmission parking pawls undertook a Six Sigma project to improve the quality of the pin diameter. The range for the pin diameter is 6.1 to 6.2 mm, and the measurements are taken with an inside-hole caliper. The project team conducted a gauge R&R study, and the ANOVA gave the following estimates: σRPT = 2.76 σRPD = 0.59 σPART = 26.6 26.75   Estimate σMS. Estimate % R&R. Based on % R&R, is this measurement system acceptable for use? Explain your decision.

The response time of a distributed computer system is an important quality characteristic. The system manager wants to know whether the mean response time to a specific type of command exceeds 75 milliseconds. From experience, she knows that the response time is approximately normally distributed, with a standard deviation of 8 milliseconds. The command is executed 25 times and the response times are recorded (n = 25). Which statistical test should be used to determine whether the mean response time is greater than the historical value of 75 millisec?

In which section of a Project Charter would you find the following statement: Raw material inventory levels are averaging 31.2 days, with a high of 45 days. These levels have exceeded the target of 25 days more than 95% of the time in the last three months. We could save $250,000 per year if inventories were at the targeted level.

An automobile manufacturer must decide whether to purchase Brand F or Brand M tires for a new car model. To help arrive at a decision, an experiment was conducted using twelve tires of each brand (nF = nM = 12). The tires were tested until tread depth reached 2/32 inches. The average and standard deviation of tire life (in miles) was calculated for both samples. Assume that tire life is approximately normally distributed. Which statistical test should be used to determine whether the two brands have the same variability in tire life?

Characteristics of a good Lean Six Sigma project include which of the following? (Select all that apply.)

Type your solution in the answer box and be sure to answer all parts of the question. A manufacturer of automotive transmission parking pawls undertook a Six Sigma project to improve the quality of the pin diameter. The range for the pin diameter is 6.1 to 6.2 mm, and the measurements are taken with an inside-hole caliper. The project team conducted a gauge R&R study, and the ANOVA gave the following estimates: σRPT = 2.76 σRPD = 0.59 σPART = 26.6 26.75   Estimate σMS. Estimate % P/T. Based on % P/T, is this measurement system acceptable for use? Explain your decision.

Based on class lectures, materials, and readings, Describe the holistic approach to integrating Lean and Six Sigma as proposed by Snee & Hoerl.  State either one advantage or one disadvantage to adopting a holistic improvement system. Explain your choice for (b).

A hospital initiated a Lean Six Sigma project to shorten the throughput time for billing patient treatments. The project passed the Define phase tollgate review and is ready to begin documenting the current “as is” process. Which tool should the team use next to capture the sequence of process steps, key decision points, and hand-offs between departments?