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Based on the historical data of 5 past and similar projects, you have calculated these average numbers of defects detected in system testing.
- For each 10000 LOC (lines of code), 200 defects
- For each person-month of development team effort, 49 defects
You want to use this information to perform estimation for a new project.
The project manager tells you that he/she has estimated 20000 new LOC for this new project.
Four developers work for four months on this project before system testing.
During system testing, 797 defects are discovered.
Assume that the system test of this new project is using the same amount of work as spent in the past projects.
Based on this information only, which of the following statement is certainly true about this project? K3 3 credits
Suggested Answer: C
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33 comments · newest first
KA
Katlyn
10 months ago
40000 LOC? That sounds like a stretch!
JA
Janessa
11 months ago
The defects seem proportional to the effort, but still concerning.
EA
Earleen
11 months ago
I’m not so sure about that, could just be a fluke.
TA
Tammi
11 months ago
Definitely higher defect density, no doubt about it.
MA
Malcom
11 months ago
Looks like they found way more defects than expected!
JA
Janey
12 months ago
Based on the defects found, it feels like D might be true since we have more defects than expected, but I need to think more about the defect density part.
NA
Nada
12 months ago
I’m a bit confused about the LOC delivered. I thought we were only estimating 20000 LOC, so C seems unlikely, but I’m not entirely sure.
AL
Aleshia
12 months ago
I think we practiced a question similar to this where we had to relate defects to team effort. It seems like B could be a reasonable assumption.
KA
Kate
1 year ago
I remember that defect density is calculated based on the number of defects per LOC, but I'm not sure if we can definitely say the new project has a higher density.
ST
Stevie
1 year ago
I feel pretty confident about this one. Calculating the expected defects and comparing to the actual should give me the answer I need. Just need to be careful with the math.
LI
Lili
1 year ago
This seems like a tricky one. I'll need to double-check my work to make sure I'm not missing anything. The information provided seems a bit incomplete.
DO
Dona
1 year ago
Okay, I think I've got it. The key is to use the historical averages for defects per LOC and per person-month to estimate the expected defects, then compare that to the actual 797 defects found.
TA
Tawna
1 year ago
Hmm, I'm a bit confused about how to use the historical data to estimate the defects for this new project. I'll need to think through the logic carefully.
AL
Alpha
1 year ago
This question seems straightforward. I'll start by calculating the expected number of defects based on the historical data and compare that to the actual number found.
GR
Gracia
1 year ago
I'm a bit confused by the different date formats in the XML structures. I'll need to make sure I understand how to properly extract the year information from each one.
TE
Terrilyn
1 year ago
Haha, looks like the project manager needs to work on their estimation skills. Option C is definitely the way to go here.
RE
Ressie
1 year ago
Looks like the project manager got it wrong this time.
HY
Hyun
1 year ago
I agree, the project manager definitely needs to improve their estimation skills.
CO
Coral
1 year ago
Option C) 40000 LOC have been delivered to system testing (against the 20000 LOC planned by the project manager)
MI
Micaela
1 year ago
I'm not sure about the proportionality between defects and development team effort. Option B doesn't seem to be a certainty based on the given information.
CR
Crista
1 year ago
D) More LOC than planned have been delivered to system testing with a higher defect density than the past projects
AU
Audria
1 year ago
C) 40000 LOC have been delivered to system testing (against the 20000 LOC planned by the project manager)
DE
Delisa
1 year ago
B) The number of defects found during the system test phase on the new project is approximately proportional to the development team effort
SH
Sharen
1 year ago
A) The code for the new project contains a higher defect density than the code of the past projects
LO
Louvenia
1 year ago
Option D seems to be the most accurate statement. The higher number of defects found during system testing suggests a higher defect density compared to past projects.
PA
Patti
1 year ago
But the number of defects found during system testing is not proportional to the development team effort.
KI
King
2 years ago
The project manager seems to have underestimated the LOC for this new project. Option C looks correct based on the information provided.
LY
Lyda
1 year ago
Looks like the new project has more LOC than planned and a higher defect density.
ME
Melita
1 year ago
797 defects were found during system testing, which is quite high.
FL
Fletcher
1 year ago
That means the project manager did underestimate the LOC for this project.
IS
Isabelle
1 year ago
Option C) 40000 LOC have been delivered to system testing (against the 20000 LOC planned by the project manager)
NI
Nickole
2 years ago
I disagree, I believe the answer is B.
PA
Patti
2 years ago
I think the answer is D.