Sherlock
Capable
Under COVer
A Long, Long Time Ago
100

This is the null hypothesis in a normality test.

What is "the data follow a normal distribution"?

100

A process capability study shows a process has a Pp = 1.55 and a Ppk = 0.98. This is the Ppk value you could obtain if the process were to be perfectly centered between the two specifications.

What is Ppk = 1.55? Ppk=Pp when the process is perfectly centered.

100

This is the meaning of the acronym PGA (not golf related).

What is Practical-Graphical-Analytical?

100

This is the acronym (and meaning) for creating a good problem statement.

What is SMARTY?

200

This is the question that an Xbar-R chart will help answer.

What is "Is there more variation from group-to-group or within a group?"

200

This is what is meant by using the term "within variation".

What is the moving range average (for no subgroups) or the subgroup range average (for subgroups)?

200

This is why you run a COV study.

What is to determine where the dominant source of variation is coming from, and to narrow down the number of inputs (X's) in your process so you know where to focus next?

200

These are the different ways you can gather VOC.

What are interviews, surveys, focus groups, complaints, sales data, etc.?

300

These are the 3 things you can detect (and how to detect them) on an I-MR chart

What are shift (1 point above UCL on MR chart), special cause (2 consecutive points above UCL on MR chart), and drift (consecutive points trending in same direction on I chart).

300

This is the difference between Cpk and Ppk.

What is Cpk uses MRbar/d2 to estimate sigma and Ppk uses standard deviation to estimate sigma?

300

Regardless of how the study was run, this is how the tree diagram must ALWAYS be entered into Minitab.

What is entering the data/tree as crossed (even when the study was run as nested)?

300

These are the 8 wastes in a process.

What is DOWNTIME?

400

On an Xbar-R chart, this is where the majority of variation is coming from if the points on the Xbar chart are mostly outside the limits.

What is group-to-group variation?

400

This is the expected yield for a process with a Ppk = 0.67.

What is 97.8%? 

400

These are the steps you would take to plan and analyze a Components of Variation (COV) study.

What are 1) draw up the tree diagram, 2) look at the data on a multi-vari chart, 3) look at the data on an Xbar-R chart, and 4) run a Fully Nested ANOVA only if the study was a fully nested study?

400

This is the term you should be looking at first (and its practical meaning) when running a Gage R&R.

What is Rbar - the measurement error, or the +/- between the observed measurement and the true value of the output?

500

These are the steps you should follow when the p-value is less than .05 for a normality test.

What are 1) check for the top reasons for failing normality (group-to-group variation, multiple modes, time order, etc.) and 2) check the data against other distributions?

500

This is the 95% confidence lower bound Ppk for a process capability study with 30 parts and an observed Ppk = 1.33.

What is LB Ppk = 1.00?

500

DAILY DOUBLE...place your wagers

How many runs are in a Full Factorial DOE with 6 factors, 2 levels, and no center points or repeats/replicates?

500

This is why the %Study < 30% can be a misleading acceptance criteria to use when analyzing a measurement system.

What is because this number is heavily influenced by the parts you selected to use in the GR&R study?