So here I have the Histogram of the time I reach my office. 2
I'm supposed to reach at 6:30 maybe plus minus five 10 minutes. 3
And this is what I recorded, this data was collected over 18 days, so every day I reach office I record 4
my time. 5
If you look at this data it will show that one of those 18 days I reached the office at 6:15. 6
Two days 7
I reach that 6:25. 8
Seven days 9
I reached at 6:30. 10
So basically this shows the trend. 11
One thing it shows is the centerpoint that on the average yes. 12
I read somewhere around 6:30 only but once it comes to spread generally I can see that my spread is 13
plus minus 15, 15 minutes early or 15 minutes late within that period only I'm reaching. 14
So that's histogram can help you in understanding the pattern. 15
Once you know the pattern, once you know the problem. 16
Your problem could be your spread is too high. 17
Your problem could be that you are off center. 18
Once you know the problem then you can look at the causes of that. 19
And what do you do for the causes. 20
You go back to cause and effect diagram. 21
So if you are reaching laet you draw a Cause and Effect Diagram of that. On that cause and effect diagram 22
you put all the causes which are basically the reason of you reaching office not exactly at 6:30 early or 23
late. 24
So once you have that cause and effect diagram, you look at the different causes than you can 25
works towards improving that consistency. 26
So this was tool number three which was Histogram.