Worksheets3.3 Quality Control
Total questions: 20
Worksheet time: 10mins
What does a histogram graphically show?
Process steps
Quality control errors
Frequency distributions
Production costs
When should one use a histogram as a quality control tool?
When the data are qualitative
When the data are numerical
When the data are categorical
When the data are visual
What aspect of data distribution can be observed by looking at a histogram?
The size of the data set
The color of the data points
The shape of the data's distribution
The time of data collection
Why is histogram considered efficient in communicating data distribution?
It predicts future trends
It quickly shows the distribution of data
It provides detailed data analysis
It simplifies data collection
In basic QC tools, what is a Pareto diagram?
A line graph representing trends over time
A scatter plot showing correlation between two variables.
A bar graph that ranks data classifications in descending order from left to right.
A pie chart displaying proportions of a whole.
What is the primary purpose of a Pareto Diagram?
To visualize time series data
To display the frequency of data points
To summarize qualitative data
To identify the most significant factors in a dataset
What is the main characteristic of sources categorized as 'VITAL FEW' in data classification for Pareto Diagram construction?
They are insignificant sources
They account for most of the problem
They account for a relatively small part of the entire problem
They are not considered in the diagram
How are sources categorized as 'USEFUL/TRIVIAL MANY' described in data classification for Pareto Diagram construction?
Large number of remaining sources account for a relatively small part of the entire problem
They account for most of the problem
They are insignificant sources
They are not considered in the diagram
What is the main purpose of a control chart?
Detecting and monitoring process variation over time
Identifying common causes of variation
Calculating average process time
Setting production goals
How does a control chart distinguish special cause from common causes of variation?
By analyzing historical trends
By calculating the median value
By comparing data to control limits
By conducting employee surveys
In a control chart, what do the upper and lower control limits represent?
The threshold for detecting out-of-control conditions
Average values of the process
The expected outcomes of the process
The target profit levels
What does a point outside the control limits on a control chart typically indicate?
Random variation in the process
A special cause variation that needs investigation
The data collection method is incorrect
The process is performing as expected
What is the purpose of a scatter diagram in determining the relationship between two variables?
Supplies the data to confirm a hypothesis
Tests the strength of a relationship statistically
Provides a visual means only
None of the above
What is the significance of placing the controllable variable on the x-axis and the dependent variable on the y-axis in a scatter diagram?
To provide a visual representation
To test the strength of a relationship
To confirm a hypothesis
None of the above
When analyzing a control chart, which of the following patterns could indicate a potential issue?
A cycle or trend over several points
A straight line of points
All points falling within control limits
Random scatter of points
What is the main goal of quality control?
To reduce costs by any means necessary
To increase production speed
To achieve, sustain and improve the quality of a product or service
To ignore customer feedback
What is the purpose of a CHECK SHEET in quality control?
To design project team forms
To analyze data quickly
To ensure data accuracy and careful collection
To solve problems efficiently
What is the purpose of a Cause and Effect diagram in quality improvement?
To analyze unrelated factors
To represent a meaningful relationship between an effect and its cause
To list all effects without identifying causes
To ignore the causes of quality issues
What is the purpose of a Cause and Effect diagram in quality improvement?
To analyze unrelated factors
To represent a meaningful relationship between an effect and its cause
To list all effects without identifying causes
To ignore the causes of quality issues
What does a Cause and Effect diagram help investigate?
What causes good or bad effects
What causes no effects
How to solve issue/problem
How to create more effects
