5.1.4 Estimation Techniques Flashcards
Test effort estimation involves predicting the amount of test-related work needed to …
meet the test objectives of a test project.
It’s important to make it clear to the stakeholders that the estimate is based on … and is always …
a number of assumptions
subject to estimation error.
Estimation for small stacks is usually more accurate than …
for the large ones.
Therefore, when estimating for a larger task, it can be decomposed into a … which then in turn can …
set of smaller tasks
be estimated.
Estimation based on ratios
In this metrics-based technique, figures are collected from … which makes it possible to derive …
previous projects within the organization,
“standard” ratios for similar projects.
Estimation based on ratios
The ratios of an organization’s own projects (e.g. taken from historical data) are generally the best …
source to use in the estimation process.
Estimation based on ratios
These standard ratios can then be used to estimate the …
test effort for the new project.
Estimation based on ratios
Example: if in the previous project the development-to-test ratio was 3:2 and in the current project the development effort is expected to be 600 person-days …
the test effort can be estimated to be 400 person-days.
Extrapolation
In this metrics-based technique, measurements are made as early as possible in the …
current project to gather the data.
Extrapolation
Having enough observations, the effort required for the remaining work can be approximated by …
extrapolating this data (usually by applying a mathematical model).
Extrapolation
This method is very suitable in …
Example: the team may extrapolate the testware necessary for effortlessly in the forthcoming iteration as the …
iterative SDLCs.
averaged effort from the last three iterations.
Wideband Delphi
In this iterative, expert-based technique, experts make …
experience-based estimations.
Wideband Delphi
Each expert, in isolation, e…
estimates the effort.
Wideband Delphi
The results are collected and if there are deviations of an expert’s estimate that are out of range of the agreed upon boundaries, the …
experts discuss their current isolation.
Wideband Delphi
The process is repeated until a …
consensus is reached.
