|
Phase of Origin |
||||||||||
|
Phase Found |
|
Req |
Des |
Code |
UT |
IT |
ST |
Field |
Total |
Cum |
|
Req |
5 |
|
|
|
|
|
|
5 |
5 |
|
|
Des |
2 |
14 |
|
|
|
|
|
16 |
21 |
|
|
Code |
3 |
9 |
49 |
|
|
|
|
61 |
82 |
|
|
UT |
0 |
2 |
22 |
8 |
|
|
|
32 |
114 |
|
|
IT |
0 |
3 |
5 |
0 |
5 |
|
|
13 |
127 |
|
|
ST |
1 |
3 |
16 |
0 |
0 |
1 |
|
21 |
148 |
|
|
Field |
4 |
7 |
6 |
0 |
0 |
0 |
1 |
18 |
166 |
|
|
Total |
15 |
38 |
98 |
8 |
5 |
1 |
1 |
166 |
|
|
|
Cum |
15 |
53 |
151 |
159 |
164 |
165 |
166 |
|
|
|
|
|
(Illustrative example, not real data) |
|||||||||
From the above DRE table, compute the following:
1.)
Effectiveness of
the code inspections. (“How good are the code inspections?”).
2.)
Effectiveness of
unit testing (“How good are the unit tests?”).
3.)
Requirements
PCE (“How well are requirements problems found and fixed during the
requirements inspections?”).
4.)
Given that the
codesize is 30 KLOC, compute the release defect density. (“How good is the
product?”).
5.)
Coding defect
injection rate. (“ How frequently are mistakes made during coding?”).
6.)
The system has 6
modules, with sizes and defects found shown below. Which of the modules do you
think may need redesign / redevelopment?
|
|
Module |
Module |
Module |
Module |
Module |
Module |
|
Size |
1 |
15 |
8 |
1 |
3 |
2 |
|
Req |
1 |
2 |
3 |
5 |
1 |
3 |
|
Des |
6 |
8 |
6 |
8 |
7 |
3 |
|
Code |
16 |
26 |
12 |
19 |
11 |
14 |