Quiz 9 review

[Video Lecture] Marketing and engineering have required the weight of a finished box of cereal to be 15 oz +/- 0.4 oz. The cereal-boxing machine typically fills boxes with a standard deviation of 0.08 oz. The cereal-boxing machine is currently producing boxes of cereal that are averaging 15.1 oz. Calculate the current Process Capability:

1.250

[Managing Variability Article] A value of Cp = 1 corresponds to 3 defects per

1000 units produced

[Video Lecture] What proportion of data that is collected from a stable process for a control chart will be ABOVE average?

50%

[Video Lecture] What proportion of data that is collected from a stable process for a control chart will be BELOW average?

50%

[Managing Variability Article] Motorola promoted bringing its process capability up to:

Cpk = 2

[Lean Toolbox] GE's version of Six Sigma revolves around six key principles which include all of the following EXCEPT:

Employees that follow Standard Operating Procedures produce higher quality work

[Video Lecture] The following are all situations that you might see in a run chart along with the appropriate analysis that fits the situation EXCEPT:

One data point is slightly lower than all the others - consider investigating the root cause.

[Video Lecture] For the purposes of our class, the following is the ONLY way to determine if there is a Special Cause of Variation present (the process is experiencing an out of control condition) on a Control Chart:

One or more of the "Control Chart Rules" are violated

[Memory Jogger II] After creating a control chart (with at least 20 data points), you should recalculate the average and redraw the chart:

Only when there has been a significant change in the process

1. Check google doc picture

Point 11

2. Check google doc picture

Point 2

[Lean Toolbox] SPC is concerned with monitoring the

Process

[Lean Toolbox] A principal approach for the reduction variation is:

Six Sigma

[Managing Variability Article] The following is a TRUE statement from the Managing Variability Article:

There is some amount of natural variability in any process, and the best we can do is to control this variation.

[Video Lecture] One of the Control Chart Rules is "14 consecutive points alternating up and down." When this rule is violated, typically this indicates that:

a worker is manually (artificially) manipulating the variables in process

[Managing Variability Article] W. Edwards Deming distinguishes between

common causes and special causes

NOTE: Control Charts could possibly be used for all of these applications. This quiz question is asking for the specific application mentioned in the Lean Toolbox book. [Lean Toolbox] The Lean Toolbox book suggests the following application of Control Charts: to be able to visualize:

demand volume

[Lean Toolbox] The fundamental assumption in Six Sigma is that everything is a process, and that

every process can be measured

[Managing Variability Article] Mathematically, regardless of the underlying distribution of the individual data, when _______________________________________________, the distribution of the sample mean will approximately follow a normal distribution. (This is the Central Limit Theorem)

samples are drawn from it

[Memory Jogger II] If Cp < 1 then

the process variation exceeds the specification

[Video Lecture] When making process improvements and evaluating the results using a Control Chart, we desire:

the standard deviation to get smaller (smaller is better)

[Managing Variability Article] We call a process "stable" if:

there are no changes in the underlying process or in how it is being operated over time.

[Managing Variability Article] The probability that a sample falls outside the control limits due to natural variation is called the probability of

type I error

[Managing Variability Article] The probability that a sample could fall within the control limits even though the underlying process has changed is called the probability of

type II error