For the chart below: Comment on Common Cause Are there any random cause ? Do you
ID: 3304960 • Letter: F
Question
For the chart below:
Comment on Common Cause
Are there any random cause ?
Do you see any threat in common cause becoming Random Cause , if so which observation ?
What does the Range Chart tell you ?
X-bar Chart 7000 6000 50.00 4000 3000 20.00 1000 0.00 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Sub-group R Chart 50.00 45.00 40.00 35.00 30.00 25.00 20.00 15.00 10.00 5.00 0.00 1 2 3 45 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Sub-groupExplanation / Answer
1) Are there any random cause ? In X bar chart the mean for observation 52 has dropped to zero.which is way drop than all other observations .
2) Do you see any threat in common cause becoming Random Cause , if so which observation ? The observation 17 where mean has dropped to 50, all the observations have commonly mean above 50 .
3) What does the Range Chart tell you ? Range chart have upper limit 35 and lower limit 0 with mean 15. Though very few observations have value near to mean . Many observations have value above mean or very below mean . There is observation 6 which has value above upper limit i.e 48 this is random cause . Also the common cause are many where the values are flucuating above and below mean . Also the random cause is mean observation 52 having value zero .
So range chart has many flucuating value which needs to be controlled .