Basic Tools for Process Improvement

More documents

Recommendations

Info

Basic Tools for Process Improvement Step 3 - Compute the range for the data set. Compute the range by subtracting the smallest value in the data set from the largest value. The range represents the extent of the measurement scale covered by the data; it is always a positive number. The range for the data in Viewgraph 8 is 590 yards. This number is obtained by subtracting -180 from +410. The mathematical operation broken down in Viewgraph 8 is: +410 - (-180) = 410 + 180 = 590 Remember that when you subtract a negative (-) number from another number it becomes a positive number. Step 4 - Determine the number of intervals required. The number of intervals influences the pattern, shape, or spread of your Histogram. Use the following table (Viewgraph 9) to determine how many intervals (or bars on the bar graph) you should use. If you have this Use this number many data points: of intervals: Less than 50 5 to 7 50 to 99 6 to 10 100 to 250 7 to 12 More than 250 10 to 20 For this example, 10 has been chosen as an appropriate number of intervals. 10 HISTOGRAM
Basic Tools for Process Improvement How to Construct a Histogram Step 3 - Compute the range for the data set Largest value = + 410 yards past target Smallest value = - 180 yards short of target Range of values = 590 yards Calculation: + 410 - (- 180) = 410 + 180 = 590 HISTOGRAM VIEWGRAPH 8 How to Construct a Histogram Step 4 - Determine the number of intervals required IF YOU HAVE THIS MANY DATA POINTS Less than 50 50 to 99 100 to 250 More than 250 USE THIS NUMBER OF INTERVALS: 5 to 7 intervals 6 to 10 intervals 7 to 12 intervals 10 to 20 intervals HISTOGRAM VIEWGRAPH 9 HISTOGRAM 11
Page 1 and 2: Basic Tools for Process Improvement
Page 3 and 4: 100 80 60 40 20 0 Basic Tools for P
Page 5 and 6: 4 5 F R E Q U E N C Y 100 80 60 40
Page 9: How to Construct a Histogram Step 1
Page 13 and 14: Interval Width Step 5 - Compute the
Page 15 and 16: S H O T C O U N T LEGEND: 25 20 15
Page 17 and 18: Interpreting Histograms Location an
Page 19 and 20: Target Interpreting Histograms Proc
Page 23 and 24: Interval Width Basic Tools for Proc
Page 25 and 26: EXERCISE 1 ANSWER KEY Step 1 - Coun
Page 27 and 28: Interval Width Basic Tools for Proc
Page 33 and 34: NO. OF PERSONNEL 30 25 20 15 10 5 0
Page 35 and 36: HISTOGRAM VIEWGRAPH 1 • A bar gra
Page 37 and 38: HISTOGRAM VIEWGRAPH 3 5 1 Title 2 H
Page 39 and 40: HISTOGRAM VIEWGRAPH 5 Step 9 - Add
Page 41 and 42: HISTOGRAM VIEWGRAPH 7 410 1 - 180 1
Page 43 and 44: HISTOGRAM VIEWGRAPH 9 More than 250
Page 45 and 46: HISTOGRAM VIEWGRAPH 11 Equal to or
Page 47 and 48: HISTOGRAM VIEWGRAPH 13 Target Targe
Page 49 and 50: HISTOGRAM VIEWGRAPH 15 Target Targe
Page 51 and 52: HISTOGRAM VIEWGRAPH 17 TOTAL NUMBER
Page 53 and 54: HISTOGRAM VIEWGRAPH 19 Range of val
Page 55 and 56: HISTOGRAM VIEWGRAPH 21 Round up to
Page 57 and 58: HISTOGRAM VIEWGRAPH 23 Step 8 - Plo
Page 59 and 60: HISTOGRAM VIEWGRAPH 25 % FAT NO. OF
Page 61 and 62:
HISTOGRAM VIEWGRAPH 27 More than 25
Page 63 and 64:
HISTOGRAM VIEWGRAPH 29 Equal to or
Page 65 and 66:
HISTOGRAM VIEWGRAPH 31 TOTAL = 105
Page 67 and 68:
HISTOGRAM VIEWGRAPH 33 Range of val
Page 69 and 70:
HISTOGRAM VIEWGRAPH 35 Round up to
Page 71:
HISTOGRAM VIEWGRAPH 37 LEGEND: MCBH
show all

Basic Tools for Process Improvement

Create successful ePaper yourself

Delete template?

Save as template?