# Control Chart, Regression and Process Capability -AboveWay Sandwich, Inc. Customer Satisfaction Improvement

AboveWay Sandwich, Inc. Customer Satisfaction ImprovementDo you

agree with their interpretation that the original process is stable?

If “NO”, please identify BY NAME which of the 11 Shewhart Tests for

Stability EACH chart fails. Revised Process Prep Data INDIVIDUALS

CHART: What did you get for a center line? What did you get

for an upper control limit? What did you get for a lower control

limit? Revised Process Prep Data MOVING RANGE CHART: What

did you get for a center line? What did you get for an upper

control limit? What did you get for a lower control limit? Is

the revised process stable? If “NO”, please identify BY NAME which

of the 11 Shewhart Tests for Stability EACH chart fails.AboveWay

Sandwich, Inc. Customer Satisfaction Improvement Deliverable:

Regression Analysis Student last name: Your last name here PART

1: Using Lunch & Dinner Data What is the correlation coefficient?

What is the regression equation? What percentage of variation

is explained by the model? HINT: There are 2 related values that can be

used to answer this question. Show them BOTH and explain which value

you would recommend using and why. Based on an ANOVA of the

regression equation, is the regression equation statistically

significant at 5% alpha risk? Why do you you say that it is either

statistically significant or not? HINT: Use the results of your ANOVA as

the basis for your answer. What is the null hypothesis for ANOVA

for a regression equation? PART 2: Using Only Lunch Data What is

the correlation coefficient for Lunch? What is the regression

equation for Lunch? What percentage of variation is explained by

the Lunch model? HINT: There are 2 related values that can be used to

answer this question. Show them BOTH and explain which value you would

recommend using and why. Based on an ANOVA of the regression

equation, is the regression equation statistically significant at 5%

alpha risk? Why do you you say that it is either statistically

significant or not? HINT: Use the results of your ANOVA as the basis for

your answer. Given the results of this study, what should your Black

Belt do next to improve customer satisfaction at lunch? PART 3: Using

Only Dinner Data What is the correlation coefficient for Dinner?

What is the regression equation for Dinner? What percentage of

variation is explained by the Dinner model? HINT: There are 2 related

values that can be used to answer this question. Show them BOTH and

explain which value you would recommend using and why. Based on an

ANOVA of the regression equation, is the regression equation

statistically significant at 5% alpha risk? Why do you you say that it

is either statistically significant or not? HINT: Use the results of

your ANOVA as the basis for your answer. Given the results of this

study, what should your Black Belt do next to improve customer

satisfaction at dinner? AboveWay Sandwich, Inc. Customer

Satisfaction Improvement Deliverable: Process CapabilityWhat did you

get for Cp? What did you get for Cpk? What, specifically,

does this particular Cpk tell you about the process that other Cpk’s may

not? What did you get for Pp? What did you get for Ppk?What did

you get for Z-score? What does this Z-score mean? HINT: Use the z

score you calculated in a sentence that explains what it tells you about

this process. Using the z score calculated above and a z table,

estimate the % of sandwiches that will be made within the 1.5 minute

goal. PPM (aka DPMO) beyond the 1.5 minute goal