4.3. Control Charts

Try these first

1. 1.

   What is a Control Chart?

   Hint

   Think about how we track quality.

2. 2.

   What do UCL and LCL stand for?

   Hint

   What do these limits indicate in a chart?

3. 3.

   What does UCL stand for in control charts?

   • Upper Control Limit
   • Universal Control Limit
   • Upper Control Line

   Hint

   It's related to what's acceptable in standards.

4. 4.

   True or False: The LCL indicates the point below which we should not have data points in a control chart.

   • True
   • False

   Hint

   What happens if we go below this limit?

5. 5.

   Given a series of compressive strength measurements over a month, identify whether any points exceed the UCL or fall below the LCL, and discuss the potential implications.

   Hint

   Look for patterns in the data to ascertain overall trends.

6. 6.

   Create a control chart with fictional data showing a gradual downward trend in compressive strength over a testing period and suggest reasons for the trend.

   Hint

   Consider external factors that might contribute to a downward trend.