Question

In: Operations Management

A finishing process packages assemblies into boxes. You have noticed variability in the boxes and desire...

A finishing process packages assemblies into boxes. You have noticed variability in the boxes and desire to improve the process to fix the problem because some products fit too tightly into the boxes and others fit too closely. Following are width measurements of the box. Using x and R charts, plot and interpret the process.

							MEAN	CI x-bar (Grand Mean)	LCL x-bar (CI-A2*R-bar)	UCL x-bar (CI+A2*R-bar)	Sample Range (Max-Min)	R-bar (Mean)	UCL R (R-bar*D4)	Spring 2020
1	68.51	68.46	68.54	68.34	68.46	68.46
2	68.94	68.2	68.54	68.56	68.7	68.7
3	68.66	68.44	68.55	68.77	68.7	68.64
4	68.49	68.94	68.56	68.62	68.69	68.56
5	68.64	68.63	68.62	68.32	68.34	68.24
6	68.34	68.42	68.99	68.02	68.03	68.47
7	68.99	68.94	68.95	68.95	68.94	68.97
8	68.92	68.91	68.97	68.93	68.96	68.95
						GRAND MEAN
		n=
		A2=
		D4=
			info from chart

Expert Solution

n= 6
A2= 0.483
D4=2.004
D3 = 0

Formula

R-chart

CL (Center line) = R-bar = 0.4

UCL = D4*R-bar = 2.004*0.4 = 0.8016

LCL = D3*R-bar = 0

We can see the process is not in control for R chart

Graph Data

Sample Range	Center line	UCL	LCL
0.2	0.4	0.8016	0
0.74	0.4	0.8016	0
0.33	0.4	0.8016	0
0.45	0.4	0.8016	0
0.4	0.4	0.8016	0
0.97	0.4	0.8016	0
0.05	0.4	0.8016	0
0.06	0.4	0.8016	0

x-bar chart,

CL (Center line) = x-bar-bar = Grand mean = 68.63479167

UCL = x-bar-bar + A2*R-bar = 68.63479167+0.483*0.4 = 68.82799167

LCL = x-bar-bar - A2*R-bar = 68.63479167-0.483*0.4 = 68.44159167

We can see the process is not in control for x-bar chart

Graph Data

Sample	Sample mean	Center line	UCL	LCL
1	68.461667	68.635	68.828	68.442
2	68.606667	68.635	68.828	68.442
3	68.626667	68.635	68.828	68.442
4	68.643333	68.635	68.828	68.442
5	68.465	68.635	68.828	68.442
6	68.378333	68.635	68.828	68.442
7	68.956667	68.635	68.828	68.442
8	68.94	68.635	68.828	68.442

keosha answered 3 weeks ago

You desire to estimate p for a binomial process. You know that p is less than...

You desire to estimate p for a binomial process. You know that p is less than 0.65 and greater than 0.45. Find n, the sample size required, to yield 95% confidence of estimating the true proportion, p, within .02. Please show all work!

Welcome to Desire, Inc! You have just been hired as the managerial account for the newly formed Desire, Inc.

Welcome to Desire, Inc! You have just been hired as the managerial account for the newly formed Desire, Inc. Desire will begin operations on October 1st, Year 1 (i.e., they did not exist before this date). Desire is a merchandising company that retails sporting goods. Your job is to prepare a master budget for Desire for the quarter consisting of October, November, and December Year 1. As part of the budgeting process, you will need to complete the following...

You have a spacecraft that is capable of reaching a speed of 0.99c and desire to...

You have a spacecraft that is capable of reaching a speed of 0.99c and desire to travel to Vega, a nearby star about 25 light years away. In order to keep track of your position, your spacecraft sends out a flash of light every second (by your ship’s clock) during the journey that can be picked up on Earth. In addition, the Earth sends out a flash every second (by the Earth clock) that you can see with a telescope...

if you have desire to have a 500,000 nest egg one day, how much will you...

if you have desire to have a 500,000 nest egg one day, how much will you need to contribute to an retirement account on a monthly basis assuming you have 30 years to save and expect an average rate or return of 5.5%?

If you have never thought about starting a business or have no desire to own one,...

If you have never thought about starting a business or have no desire to own one, tell us why. Would you rather not have the responsibility or burden? Include the advantages of not starting a business and the cons about it.

1. What have been the biggest changes that you have noticed in how you learn as...

1. What have been the biggest changes that you have noticed in how you learn as a 2. Would you be willing to take a blended delivery (partially in person and partially online) 3. Your employer has approached you to assume a managerial role. Although flattered, you are also concerned about your ability to carry out the role successfully. What type of training or development might you want to help you succeed? What would be the “core skills” and “soft...

You are the auditor of Winter Valley. You have noticed that the town is recording all...

You are the auditor of Winter Valley. You have noticed that the town is recording all of their transactions in the General Fund. The town has not established additional funds although they have the following transactions. They are constructing a new city hall They have a town operated skating rink for which they charge an entrance fee. They have $2,000,000 in an employee pension plan. They are paying interest and principal on Winter Haven Municipal Bond They have unclaimed funds...

I. You are the Auditor for Winter Valley. You have noticed that the town is recording...

I. You are the Auditor for Winter Valley. You have noticed that the town is recording all transactions in the General Fund. The town has not established any other funds although they have the following activities: ● They are constructing a new City Hall ● They are paying interest and principal on Winter Haven Municipal bonds ● The have established a $3,000,000 endowment fund to fund the maintenance of the town library into perpetuity. ● They have passed a gasoline...

Have you ever noticed that, when you tear a fingernail, it tends to tear to the...

Have you ever noticed that, when you tear a fingernail, it tends to tear to the side and not down into the finger? (Actually, the latter doesn’t bear too much thinking about.). Why might this be so? One possibility is that fingernails are tougher in one direction than another. A study of the toughness of human fingernails compared the toughness of nails along a transverse dimension (side to side) compared with a longitudinal direction, with 15 measurements of each (Farren...

If you desire to have $5,000,000 in your retirement account at the age of 65, how...

If you desire to have $5,000,000 in your retirement account at the age of 65, how much must you invest each year, if you start investing at the age of 25, 35, and 45. Assuming you can earn an average annual return of 8%.