1. Author: Mahedi Mahfuj -0207
Bug Taxonomy
Functionality error:
Doesn’t do what it should do.
Communication error:
Can’t interpret what it is doing….communication gap.
Command structure:
Confusing commands…..After selecting Print button, there must be an
OK button, its absence will cause command error.
Missing command:
Can be customized, but the option is absent.
Performance error:
Program is running in slower rate.
Output error:
Does provide the desired output….what I want?
Error handling type errors:
Error Prevention:
We could not anticipate the possibility of errors & protect
against them.
Error Detection:
We could not notice error condition.

2. Author: Mahedi Mahfuj -0207
Error Recovery:
We could not deal with a detected error.
# Ensuring good error message.
Boundary Related Error:
My limit is 12 digits….I may have given 13 digits….so, boundary related error.
Calculation Type Error:
# Error in mathematical calculation.
# Value of something should have been same throughout the system, but it is
changing frequently.
# Wrong operation order.
Initial & Later States:
When I install something newly in PC some registry key, temp file etc are created.
If not created, then Initial States error.
In later time, if my PC crashes, some valuable information may not be there after
restoring the system. This is Later State error.
Control Flow error:
Can’t understand where to go after whom.
Errors in interpreting data:
# I expect integer, you are providing me character…..so, misinterpretation.
# Some data should have gone to Capital table, but going to Loan table.

3. Author: Mahedi Mahfuj -0207
Race condition:
1 seat vacant, 2 hits at the same time….whom to give the seat?
Load condition:
Deviation from behavior when over loaded.
# 3 types of testing related to load condition:
1. Load Testing:
How an application runs when 1000 user use this at a time…..how it functions?
2. Stress Testing:
I am increasing load continuously. How much stress my application can take?
3. Performance Testing:
I want the output in 5 seconds. First, I check normally. Gradually, I will try to
increase load. Is still responding within 5 seconds or not?
Hardware error:
To send numerous data through the port of the printer and check any error
occurring or not?
Source and version control error:
Create a new version fixing the errors of the previous version. But, if for some
reason, new enhancements do not work or cause another error, then this is
source and version control error.
Documentation error:
Error found in documentation……misleading information.
Testing error:
# Did not notice an obvious problem.

4. Author: Mahedi Mahfuj -0207
# Did not execute a planned test.
# Unnecessary testing without testing code segments of higher priority.