SQC Control chart

What does a X bar & R control chart helps to monitor for a machining shop?

• Shop floor size; Big or small

• Price of component; High price or low price

• Ongoing processes; such as the production capabilities of machines.

Identify the application/(s) of Control Chart from the options given below. Select more than 1 answer.

• Improve Productivity.

• Defect prevention.

• Avoid process adjustment.

• Diagnostic information for quality-related analysis.

• Information about process capability.

3 sample's dimension were recorded as follows:

1. 10.1 mm

2. 10.2 mm

3. 10.3 mm 

What is the Mean dimension and Range of dimension recorded?

• Mean: 10.6 mm

  Range: 0.1 mm

• Mean: 10.2 mm

  Range: 0.2 mm

• Mean: 10.3 mm

  Range: 0.3 mm

What are the value required for plotting R chart.

Select more than 1 answer.

• Max. value minus Min. value of the sample data set & Average range value of all data set.

• UCL & LCL of R chart

• UCL & LCL of X bar chart

• Mean value of data set & Average value of Mean data set.

What are the value required for plotting X bar chart?

Select more than 1 answer.

• UCL & LCL X bar chart

• Mean value of data set & Average value of Mean data set.

• UCL & LCL of R chart

• Max. value minus Min. value of the sample data set & Average range value of all data set.

Describe what should be performed when data point/(s) is outside of UCL or LCL of control chart?

• Amend the data point recorded to plot the control chart.

• Review the control chart and call for an investigation on the data points that is out of UCL or LCL range