Lean six sigma green belt

Which pillar of Total Productive Maintenance (TPM) allows machine operators to gain more knowledge about and take greater ownership of their equipment?

Pillar 1 - autonomous maintenance

Which SPC chart should be selected with the following conditions: attribute output and the tracking of % defective desired with a sample size across the 25 tellers?

NP Chart

Which statement is most correct about regression analysis?

Non-linear regressions can explain curvature with more statistical confidence than linear regressions.

Which statements are correct about residuals from a proper, statistically correct linear regression analysis?

Residuals are the differences between observed and predicted values of data.

Which statements are correct about the advanced capability analysis shown below?​

This is a Poisson capability analysis.

Which statements are true about the process shown? (image)

The majority of the process is within specifications.

Which statements are true about the below regression?

 

Over 30% of the variation of the output is explained by the independent variable with the linear regression.

Which type of chart is appropriate when sample size is variable and each sample may contain more than one instance of the targeted condition?

U-Chart

While reviewing an X-bar control chart, you notice a set of seven consecutively decreasing points. You check previous control charts and notice that this is not a regular occurrence. What could have caused this behavior?

Machine deterioration

Why is it important to validate data sources?

To ensure the data is accurate and credible for decision making.

XYZ Company is a small business that fills water bottles on an assembly line. The Operations Division is in charge of tracking the amount of water filled in each bottle by the company's distribution equipment. An X-S chart is normally used to track the amount of water in each bottle, and groups the samples by 20. However, he could also monitor the process by doing which of the following?

Grouping the samples by 5 and using X-bar & R charts to track variations in amount..

You are a Belt and through analysis it was discovered that making a change in a process would increase throughput by 200 units per hour. Further analysis showed that the cost of fixing the process would be greater that the revenue gained from the increased throughput. Should you suggest this process change.

No, because there is not a Practical difference

You are a Belt asked to help find the source of variation in a process. It is discovered that most of the variation occurred during the night-shift. This would be an indication of what type of variation.

Temporal variation

You are mapping a process. What would be the best way to begin the mapping process?

Walk the actual process from beginning to end

You are studying the process of producing chicken feed. You want to find out if making a change to one of the pieces of equipment will change the daily mean output for that process by 12,000 pounds. Historically, the standard deviation of the daily production of chicken feed is 36,000 pounds. Which option represents the minimum sample size required to confirm the significance of a shift for the mean output that is more than 12,000 pounds at a 95% confidence level (Z=1.96), assuming a normal distribution?

35