IET 43640 MIDTERM EXAM ACTUAL QUESTIONS

IET 43640 MIDTERM EXAM ACTUAL / QUESTIONS

AND ANSWERS VERIFIED A+ PASS.

what does "specification limits" or "spec limits" refer to?-total variation actually measured from the process

• variation allowed by the specification
• voice of the process
• voice of the customer - --Answers---voice of the customer

in order to calculate a process capability index (Cp), what two factors must be known about the process?-the process average and process control spread

• specification limits and the standard deviation
• process standard deviation and Z value

-process confidence interval and process average - -- Answers---specification limits and the standard deviation

what is often the definition of process capability?-the way to determine the key process indicator -description of a process in steps and decisions

• variability of a process compared to requirements - --

Answers---variability of a process compared to requirements

when a process is not centered relative to specifications, which of the following statements is true?-Cpk is the larger value in comparison to Cp 1 / 3

-Cpk is the smaller value in comparison to Cp -Cpk is equal to Cp when the population is not centered - -- Answers---Cps is the smaller value in comparison to Cp

why is the normality assumption essential to the interpretation of the capability index?-because only normal distributions are capable of statistical control -because a spread of 6 standard deviations represents 77% of cases -because the specifications are always explained by the bell curve

• because the normal distribution always has a mean of zero -

--Answers---because only normal distributions are capable of statistical control

a scientist wants to understand if daily calorie intake of a test animal is intermittent. what type of SPC chart should she apply?

• U chart
• X bar and R chart
• P chart
• individuals and moving range chart - --Answers---

individuals and moving range chart

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a commuter to campus averages about 15 minutes per day.however, one day it takes 45 minutes to get there due to a blizzard. what type of variation is being exhibited?

• special cause variation
• common cause
• measurement cause variation
• both common and special variation - --Answers---special

cause variation

a publisher wants to understand the number of errors per page a printer, on the same book, being producing in a printing process. what type of SPC chart should they apply?

• X bar and R chart
• P chart
• X bar and S chart
• C chart - --Answers---C chart

a LSS team wants to collect data on the cycle time for a process using SPC. they are debating if they want to collect the data per hour, day, or week. what is the issue with regard to SPC that they are discussing?

• operational definition
• bias
• rational subgrouping
• business case rationale - --Answers---rational subgrouping
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