Read the case study given below and answer the questions given at the end.

A manufacturing plant makes windmill assemblies & can produce 50 units in a month in two periods of 15 days each; the following is the data for the number of defects arising per month.

Month	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Number of Defects per period	43	3 2	1 0	4 5	6 7	7 7	96	5 4	2 3	0 2	2 3	4 3

Questions:

1. Which control chart should be used for the above data and why?

2. Make the appropriate control chart on graph paper.

3. Interpret the chart and give your recommendations, on whether the process is in control or not?

Answer rating: 100% (QA)

1 A control chart for attribute data specifically a pchart should be used for the above data ... View the full answer