6 SIGAM - MyEssayDoc

Question 1

The following chart represents your sandwich prep time IMR control charts set of your sandwich process. You are the Lead Green Belt of a Quality Assurance Team that will report the findings to the management. Interpret the charts for Ms. Nguyen, your district manager.

More to Read:

Quality Improvement

Question 2

Use the following data decide if the outcome of an operation depends on the process used

Condition	Process A	Process B	Process C	Process D	Process E
No improvement	13	5	8	21	43
Partial improvement (less than goal)	18	10	36	56	29
Met improvement goal	16	16	35	51	10

Solution

Question 3 (

Gabriel is working on a project to address the root cause of defective sub-assemblies. It has been brought to Gabriel’s attention that a higher percentage of defectives are produced in the third shift. Gabriel collected the following data to check the validity of the above claim:

Test at 5% significance level to determine if the proportion of defectives is the same for all three shifts

TYPE	First Shift	Second Shift	Third Shift
Defectives	43	56	68
Non-Defectives	965	878	781

Solution

Question 4

The customer expectation when phoning a customer service line is that the average amount of time from completion of dialing until they hear the message indicating the time in queue is equal to 55.0 seconds (less than a minute was the response from customers surveyed, so the standard was established at 10% less than a minute).

You decide to randomly sample at 20 times from 11:30am until 9:30pm on 2 days to determine what the actual average is. The actual data was as follows:

54.1, 53.3, 56.1, 55.7, 54.0, 54.1, 54.5, 57.1, 55.2, 53.8,54.1, 54.1, 56.1, 55.0, 55.9, 56.0 ,54.9, 54.3, 53.9, 55.0

What is a 95% confidence interval for the true mean call completion time?

What is the 95% confidence interval on the standard deviation

Solution

Question 5

The following data represent the value of a certain quality characteristic of interest during a LSS improvement project. Using your knowledge in SPC as Green Belt, please interpret the data and statistically state your case for Ms. Nguyen your district Manager

#	Date	Stage	Project Metric
1	4/13/2015	Baseline	85
2	4/20/2015	Baseline	78
3	4/27/2015	Baseline	86
4	5/4/2015	Baseline	81
5	5/11/2015	Baseline	82
6	5/18/2015	Baseline	88
7	5/25/2015	Baseline	83
8	6/1/2015	Baseline	86
9	6/8/2015	Baseline	85
10	6/15/2015	Baseline	88
11	6/22/2015	Baseline	82
12	6/29/2015	Baseline	78
13	7/6/2015	During Project	81
14	7/13/2015	During Project	85
15	7/20/2015	During Project	83
16	7/27/2015	During Project	88
17	8/3/2015	During Project	86
18	8/10/2015	During Project	89
19	8/17/2015	During Project	87
20	8/24/2015	During Project	85
21	8/31/2015	During Project	90
22	9/7/2015	During Project	89
23	9/14/2015	During Project	92
24	9/21/2015	During Project	90
25	9/28/2015	During Project	93
26	10/5/2015	During Project	89
27	10/12/2015	Post Project	94
28	10/19/2015	Post Project	97
29	10/26/2015	Post Project	96
30	11/2/2015	Post Project	91
31	11/9/2015	Post Project	97
32	11/16/2015	Post Project	98
33	11/23/2015	Post Project	99
34	11/30/2015	Post Project	94
35	12/7/2015	Post Project	95
36	12/14/2015	Post Project	97
37	12/21/2015	Post Project	97
38	12/28/2015	Post Project	96
39	1/4/2016	Post Project	97

Solution

Question 6

The operational data at a pizza processing facility in upstate New York are as follows:

One workday = 8 hours

Lunch time =30 min

Break (twice per shift) = 15 min each

Number of shifts = 2

Days per week = 5

Demand = 300 units per week

Total waiting time per unit = 75 min per unit

Delay from other activities = 30 min per unit

Compute the following:

Takt time
Pitch time
Cycle Time
Lead Time

Solution

Last Updated on February 11, 2019