Table 3: Defect Data Cross-Tabulated by Where Found and Defect Origin Defect Origin Where Found Require- ments Design Co

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Table 3: Defect Data Cross-Tabulated
by Where Found and Defect Origin
Defect Origin
Where Found
Require- ments
Design
Code
Unit Test
Component
Test
System Test
Release
Total
RQ
-
DI
6
42
48
CI
12
28
941
981
UT
21
43
223
2
289
CT
20
41
261
-
4
326
ST
6
8
72
-
-
1
87
Release
8
16
40
-
-
-
1
65
Total
73
178
1537
2
4
1
1
1796
Legend:
RQ
Requirements analysis
DI
Design inspection
CI
Code inspection
UT
Unit testing
CT
Component testing
ST
System Testing
Find the defect removal effectiveness of: