Basic Tools for Process Improvement

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Basic Tools for Process Improvement How is a Histogram constructed? There are many different ways to organize data and build Histograms. You can safely use any of them as long as you follow the basic rules. In this module, we will use the nine-step approach (Viewgraphs 4 and 5) described on the following pages. EXAMPLE: The following scenario will be used as an example to provide data as we go through the process of building a Histogram step by step: During sea trials, a ship conducted test firings of its MK 75, 76mm gun. The ship fired 135 rounds at a target. An airborne spotter provided accurate rake data to assess the fall of shot both long and short of the target. The ship computed what constituted a hit for the test firing as: From 60 yards short of the target To 300 yards beyond the target 6 HISTOGRAM
Basic Tools for Process Improvement Constructing a Histogram Step 1 - Count number of data points Step 2 - Summarize on a tally sheet Step 3 - Compute the range Step 4 - Determine number of intervals Step 5 - Compute interval width HISTOGRAM VIEWGRAPH 4 Constructing a Histogram Step 6 - Determine interval starting points Step 7 - Count number of points in each interval Step 8 - Plot the data Step 9 - Add title and legend HISTOGRAM VIEWGRAPH 5 HISTOGRAM 7
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: 4 5 F R E Q U E N C Y 100 80 60 40
Page 9 and 10: 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
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Basic Tools for Process Improvement

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