The main reason of preferring an Individuals over an Averages charts is
OPTIONS
- Need to collect lesser samples
- Process shifts detected easily
- Additional sensitivity by averages charts not justified
- Process drifts detected easily
Correct Option:A
Need to collect lesser samples
EXPLANATION
Plots individual observations (I chart) and moving ranges (MR chart) over time for variables data. Use this combination chart to monitor process center and variation when it is difficult or impossible to group measurements into subgroups. This occurs when measurements are expensive, production volume is low, or products have a long cycle time.
