c) In your development, you have 20 errors at the requirement stage, and it is amplified by a factor of 2:1 into design stage. In addition, 15 design errors are introduced and then amplified to 2.5:1 into code stage, where an additional 10 crrors are introduced. Then, in testing stage, unit testing will find 25% of all errors, integration testing will uncover 30% of the remaining errors and validation tests will find 50% of the remaining errors. FYI, int this case no reviews are conducted. Please find and show how many errors will be released to the field.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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c) In your development, you have 20 errors at the requirement stage, and it is amplified by a
factor of 2:1 into design stage. In addition, 15 design errors are introduced and then amplified
to 2.5:1 into code stage, where an additional 10 errors are introduced.
Then, in testing stage, unit testing will find 25% of all errors, integration testing will uncover
30% of the remaining errors and validation tests will find 50% of the remaining errors. FYI,
int this case no reviews are conducted. Please find and show how many errors will be released
to the field.
d) Consider the situation described in 4 (c), but now assume that requirements, design, and
code reviews are conducted and are 40% effective in uncovering all errors in all stages.
How many errors will be released to the field? Compare with 4 (c).
Transcribed Image Text:c) In your development, you have 20 errors at the requirement stage, and it is amplified by a factor of 2:1 into design stage. In addition, 15 design errors are introduced and then amplified to 2.5:1 into code stage, where an additional 10 errors are introduced. Then, in testing stage, unit testing will find 25% of all errors, integration testing will uncover 30% of the remaining errors and validation tests will find 50% of the remaining errors. FYI, int this case no reviews are conducted. Please find and show how many errors will be released to the field. d) Consider the situation described in 4 (c), but now assume that requirements, design, and code reviews are conducted and are 40% effective in uncovering all errors in all stages. How many errors will be released to the field? Compare with 4 (c).
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