What is the Variation?
Back to Control Charting Basics
Laboratori, Laboratori, Give Me the Formuoli
What's Wrong With This Picture?
Team Dow
100
________ _________ ________ results from the combined effects of uncontrolled factors acting on a measurement system.
Common Cause Variation
100
A ________ _________ is a tool used to help maintain a stable measurement system.
Control Chart
100
Control Charts can be used to indicate when _______ _______ or ________ should be performed.
Preventative Maintenance or Recalibration
100
Based on the chart below, what are some potential follow up actions?
Background Info: This chart is used to track long term SQC for an instrument that requires a daily calibration drift adjustment. Several of the ACCAs state that the wrong drift were used and/or the adjustment not applied. The true value of the SQC is 3.94 
There is evidence that the instrument procedure is not being followed as intended. Further investigation should take place to determine why the procedure was not followed and to retrain personnel. Any known information should be entered into the out of control and pattern rule violation data points for long term data tracking.
100
Dow Headquarters are located in _________.
Midland, Michigan
200
________ ________ ________ indicates that the measurement system has changed in some way.
Special Cause Variation
200
The _________ _________ is the measurement system change that caused the out of control data point.
Assignable Cause
200
Servicing an instrument on a set schedule can add ______ ______ _______ to a system unnecessarily.
Special Cause Variation
200
Based on the chart below, what are some potential follow up actions?
Background Info: This chart is used to track SQC for a densitometer. The ACCAs present only include the acknowledgers initials.
Based on the instrument performance, the control limits should be reevaluated since the data is not distributed on either side of the center line. Additionally, analyst should be retrained to include comments in addition to initials.
200
Dow was founded by ________ _________.
Herbert H. Dow
300
_______ _______ can be used to help detect Special Cause Variation before going out of control.
Pattern Rules
300
The _________ _________ is the fix that returns the measurement system to a state of statistical control.
Corrective Action
300
_______ Charts can be used to monitor instrument performance for samples that degrade/change at a constant rate.
Range
300
Based on the chart below, what are some potential follow up actions?
Background Info: This chart is used to track concentration of a GC component that degrades over time.
There are Pattern Rule violations present. If ACCAs are required for these based on the business, they should be entered. Also it would be worth evaluating using a Range Chart for long term monitoring.
300
In 1953, Dow introduces _________ _________ for household use.
Saran Wrap
400
For normally distributed data, _______ of the data resides in the six central regions of the bell curve.
99.7%
400
________ ________ are the voice of the measurement system. ________ _________ are the voice of the customer.
Control Limits and Specification Limits
400
400
Based on the chart below, what are some potential follow up actions?
Background Info: This chart is used to track the concentration of a component on a GC standard.
The GC chromatogram should be viewed to see if there is a missed peak, and changes made as applicable. ACCAs should be entered by analysts for out of control points.
400
The _________ site is the largest integrated chemical manufacturing complex in the Western Hemisphere
Freeport
500
________ must be removed before calculating control limits.
Outliers or Special Cause Variation
500
Name one commonly used pattern rule that is used to detect Special Cause Variation.
•8 above the center line
•8 below the center line
•6 increasing
•6 decreasing
•14 alternating
500
For lab equipment, generally only ______ _______ are used to determine if the lab is generating acceptable data.
Control Limits
500
Based on the chart below, what are some potential follow up actions?
Background Info: This chart is used to track density of a reference standard.
If required by the business, ACCAs should be entered for pattern rule violations.
500
Dow Chemical was founded in _____.
1897