Process Quality Test 2

you assume your sample size is constant and thus employ the simpler control charts, if your sample size varies by not more than

10%

to detect a small shift in the mean, which control chart might be useful

CUSUM

p chart

Control chart for counts of defectives (Binomial distribution) with a variable sample size

Pareto charts have scales on both the left and the right side. What is the scale on the right axes used for?

Cumulative Percentage

which of these options is NOT typically included on a fishbone diagram

Motors

for a binomial distribution and in a system with a constant sample size the most correct chart to employ would be

NP

for a binomial distribution and in a system with a variable sample size the most correct chart to employ would be

P

out of control

Points outside the 3 sigma control limits

Which tool is used to show changes over time

Trend charts

Brainstorming activities are best carried out as a group excercise

True

Fishbone diagrams can be used for guided brainstorming activities as well as categorizing the results of brainstorming activities

True

You need to understand the purpose of the various quality tools available in order to choose the right tool for the right job at the right time

True

for a poisson distribution and in a system with a variable sample size the most correct chart to employ would be

U

CUSUM charts use a ______ instead of traditional control limits

V mask

XbarR

a control chart used when data are grouped together

Attribute Data

data from a discrete distribution wherein only whole number (counts) are possible

Variables Data

data from a distribution wherein any number or fraction of a number is possibel

MR- moving range

difference between two consecutive points

binomial distribution

distribution of discrete data that are made up of data that have only two choice (e.g. pass/fail)

poisson distribution

distribution of discrete data that is made up of counting data. In this case only whole numbers are present

Special causes are always bad

false

Trend charts show the relationship of two variables to each other

false

control charting should always be done by hand never by using computer software

false

normal distribution are an example of attributes data

false

scatter plots are used to show the effect of time on a parameter

false

a graphic representation device whereby ideas or causes are grouped into common categories such as manpower methods machines and materials know as an Ishikawa or cause and effect diagram

fishbone diagram

which of these option is a graphical device for grouping causes together

fishbone diagram

what is the difference between individual control charts and xbar R charts

individual control charts use individual measurements whereas xbar R charts us averages of subgrouped measurements

CUSUM, EWMA, zone, individuals, and Xbar R charts are all based on the _______distribution

normal

a cycle for continuous improvement that implements the following steps: planning, doing, checking and acting

plan-do-check-act (PDCA) cycle

There are three main rules for interpreting control charts. which of thes options is NOT one of those rules out of control runs shifts trends

runs

shifts

runs of 8 points above or below average

trends

runs of 8 points going up or down

the pareto principle is also known as

the 80/20 rule

According to the Pareto principle, the 80% of the causes responsible for 20% of your problems are called

the trivial many

According to the Pareto principle, the 20% of the causes responsible for 80% of your problems are called

the vital few

what is the purpose of variable control charts

they help distinguish between common cause and special cause variation

what is the purpose of zone charts

they make setting up plotting monitoring and interpretation of control charts as simple as possible

control charts add the element of _______ to your understanding of distribution of data

time

Poisson distribution are an example of attributes data

true

binomial distributions are an example of attributes data

true

UCL- upper control limit

typically 3 standard deviations above the mean

LCL-lower control limit

typically 3 standard deviations below the mean

Use Xbar R charts

when your data are grouped into rational subgroups

use individual control charts

when your data cannot be grouped into rational subgroups

which is the best control chart to use in the processing industry

whichever one is the best fit for the particular need

Pareto charts have scales on both the left and the right side. What is the scale on the left axis used for?

Frequency

a group exercise designed to solicit a large number of ideas in a short amount of time

brainstorming

a group technique for gathering large quantities of ideas in a short time span is

brainstorming

for a poisson distribution and in a system with a constant sample size, the most correct chart to employ would be

c

Connect to another section of the flowchart (often offpage)

circle

The use of constant sample size simplifies the control charts because

constant sample size allows you to have only one set of control limits instead of different controls limits for each point

np chart

control chart for counts of defectives (binomial distribution) with a constant sample size

c chart

control chart for counts of defects (poisson distribution) with a constant sample size

u chart

control chart for counts of defects (poisson distribution) with a variable sample size

Decisions or Questions flowchart shape

Diamond

a control chart that takes previous data into account but gives more weight to the most recent data is the ______ chart

EWMA

Process steps flowchart shape

Rectangle