Description
Consider the data listed in the following matrix for a product of size 120KLOC:
-
Calculate the defect removal rate for every phase
-
Calculate the defect injection rate for every phase
-
Calculate the defect escape rate for every phase
-
Calculate the overall defect removal effectiveness.
-
Which phase is the most effective in removing defects? Explain.
-
Do you think reviews and inspections were effective? Explain.
-
If the number of defects originated in design phase increased by 10% and defects detected in design review increased by 10%, do you think that will have a positive or negative impact on the defect removal effectiveness in the coding phase? Explain your answer in detail (present data to support your answer).
Defect Origin
Where Found
Requirement |
Analysis |
Design |
Coding |
Unit |
Integration |
System |
Field |
|
Testing |
Testing |
Testing |
||||||
Requirement |
50 |
|||||||
Analysis |
24 |
45 |
||||||
Design |
56 |
51 |
77 |
|||||
Coding |
48 |
47 |
84 |
189 |
||||
Unit Testing |
22 |
14 |
38 |
78 |
12 |
|||
Integration |
17 |
22 |
47 |
41 |
– |
11 |
||
Testing |
||||||||
System |
11 |
12 |
16 |
33 |
– |
– |
19 |
|
Testing |
||||||||
Field |
3 |
2 |
4 |
3 |
– |
– |
– |
3 |