spctoolv1 6(dev)

7/27/2019 SPCToolV1 6(Dev)

http://slidepdf.com/reader/full/spctoolv1-6dev 1/38

Statistical Process Control (SPC) for Development and Reengg

Version 1.0

Introduction

1 This tool helps in plotting the control charts for a set of parameters

like effort deviation, review efficiency, review effectiveness, review

coverage rate, defect injection rate and defect density. You can select

any or all of the parameters.

2 In sheet "Datasheet-Development", fill up the relevant column for

control chart.

3

Upper Control and Lower Control Limits are calculated based on data

obtained for first 12 requests

4 Every project could set their default USL and LSL in the

corresponding worksheet containing the chart. When 12 points are

there, UCL and LCL will be calculated and plotted automatically.

Setting USL and LSL values are optional.

5 To modify the control chart deselect and select the parameter

6 Column 2 of the data entry sheet is mandatory .If program/request

name is not mentioned the corresponding data point will not be

considered.

Note:

Irrespective of number of data points present control charts can

accommodate only 1st 50 valid data points.

To eliminate out of control points or old data points eliminate the

corresponding program/request number

Legend

Main She



List of mandatory fields for different parameters

Parameter Mandatory field

Effort deviation Actual effort

Estimated effort

Defect injection rate

(DIR)

Actual effort

Defect density Review defects

Testing defects

Size in FP

Review eff iciency Review effort

Review effectiveness Review defects

Testing defects

Review coverage rate Review effortSize in FP

Needs user input

Should not be edited

Select from drop down list

for data sheet

et



Parameters For Control chart

Note: Enable macro before proceed

Effort Deviation

Defect Injection Rate

Defect Density

Review Efficiency

Review Effectiveness

Review Coverage Rate

Introduction

Data Sheet



Instruction

1. Enter data in the data sheet

2. Select the parameters for the control chart. You

need to reselect the parameters, if you made the

selection before entering the data.



Review

(6)

Testing

(7)

1

2

3

4

5

6

7

8

9

10

11

12

13

1415

16

17

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20

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29

30

31

32

33

34

35

36

37

38

39

40

4142

43

44

45

46

47

48

49

Coding Defects

Defect

DataSheet- Development / Reengg

Sr No

(1)

Program Name/Reqirement Name

(2)

Effort (in Person Hours)

Actual

effort

(3)

Estimated

effort

(4)

Review

effort

(5)

Main Sheet Introduction



50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

7071

72

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80

81

82

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84

85

86

87

88

89

90

91

92

93

94

95

96

9798

99



Conv.

Factor

FP

(11)

Language

(12)

LOC

(10)

Size



Defect Injection Rate Charts

Point Cause

0

0

0

0

0

1

1

1

1

1

1

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37

D e f e c t s / u n i t

Data Points

C chart

Main She



Corrective Action

39 41 43 45 47 49

DIR

UCL

LCL

CL

UWL

LWL

et Data Sheet



Defect detection distribution in coding and unit testing(%) 70

Defect detection distribution in UT(%) 30



Review Effectiveness Charts

Point Cause

0

2

4

6

8

10

12

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33

R e v .

E f f e c t i v e n e s s

Data Point

X- Chart

Main She



USL 10

LSL 0

Corrective Action

35 37 39 41 43 45 47 49

UCL

LCL

CL

X value

USL

LSL

UWL

LWL

0

1

1

2

2

3

3

4

4

5

5

1 3 5 7 9

P e

r c e n t a g e

et Data Sheet



Defect detection distribution in coding and unit testing(%) 70

Defect detection distribution in UT(%) 30

11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49

Data Point

mR Chart

UCL

LCL

CL

Moving Range

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