LSS Week 4 + 5 Flashcards
Why is a sample taken rather than measuring the whole population?
It is more time and cost effective
The most important thing teams should consider when deciding what customer data to collect
?? Is the data actionable ???
The purpose of a Gage R&R is
- To determine the precision, repeatability, reproducibility, and the total variation resulting from the measurement system.t system.
Use continuous data where possible, because
It tells us the magnitude of the issue
Which of the following measures of dispersion is used ONLY with the mean?
Standard Deviation
What is dispersion?
The spread of the data
A run chart can reveal
Shifts & Trends
What is attribute/Discrete Data?
data that can be counted and classified into distinct categories. “yes/No” “Good/Bad” “Red/Blue/Green”
Standard Deviation allows you to tell
What % should be certain distances from the Mean.
What is a nominal-is-best quality characteristic?
This quality attribute is simply about whether a characteristic is present or absent, or meets a specific criterion.. are the apples red or not.
Which measure of variation describes the distance between the highest and the lowest points of data?
The Range
What are the benefits of a box and whisker plot?
Box-and-whisker plots are very effective and easy to read. They summarize data from multiple sources and display the results in a single graph.
What is an advantage of Defects per Unit (DPU) -over- Rolled Throughput Yield (RTY)?
It accounts for multiple defects per unit of production
What should you have at the end of the measure phase?
A measure, targe and a gap.
Why should a sample be random?
So that it is representative of the population
What are the primary uses of a defect location check sheet?
To reveal the location on a part where defects are occurring
Pareto was an Italian economist famous for the 80/20 rule, which means
80 % of wealth belongs to 20% of the population
Baseline data plays an important role in project success because it facilitates
Benefit estimation & Project Planning
What term describes the probability that a product or service will go through all steps of the process without a defect?
Rolled throughput yield (RTY)
A bimodal distribution means that
There is “two of something” impacting the process.
What is a stem and leaf display?
A display that shows the shape of the distribution of the data.
What is continuous or variable data?
Data that can take any value within a given range. It is measured on a scale and can be infinitely divided into smaller units, allowing for high precision like time, temperature, weight, length, and pressure.
What is the minimum recommended sample size for collecting discrete data?
100 data points
What is the minimum recommended sample size for collecting Continuous data?
30 Points
