Lean six sigma green belt

What are three aspects of descriptive statistics?

Central tendency, Dispersion, Distribution shape.

What are visual controls?

Devices to communicate production status at a glance.

What causes of variation are present on a control chart for a process that is in control?

Common cause variation.

What do control limits represent?

The thresholds for common cause vs special cause variation.

What does a control chart consist of?

Center line, upper and lower control limits, and data points plotted over time.

What does a histogram show?

The distribution and shape of data related to a metric.

What does ANOVA analysis do?

Compares means of multiple groups to see if there is a statistically significant difference.

What does correlation analysis measure?

The strength of relationship between two variables.

What does CTQ stand for?

Critical to Quality.

What does DMAIC stand for?

Define, Measure, Analyze, Improve, Control.

What does DOE stand for and what is it used for?

Design of Experiments - test potential solutions to determine effectiveness.

What does FMEA stand for and what is it?

Failure Mode and Effects Analysis - assess risk priority of process failures.

What does TAKT time measure?

The pace of customer demand.

What does TPM stand for?

Total Productive Maintenance.

What factors should be considered when defining the problem in DMAIC?

Impact on customer, impact on business, scope, and resources required.

What is a affinity diagram?

A tool to organize ideas into groups based on natural relationships.

What is a bottleneck?

Any resource whose capacity is equal to or less than the demand placed on it.

What is a box plot used for?

To visualize distribution, outliers, and quartiles in data.

What is a breakthrough event?

A dramatic change in process during which a team gets past an old barrier or milestone to achieve a significant increase in efficiency, quality or some other measure.

What is a cell?

An arrangement of people, machines, materials and equipment in which the processing steps are placed right next to each other in sequential order and through which parts are processed in a continuous flow.