You have been hired as a contract project manager for Tech Perfect Inc. The project has already
been started. Sufficient details of the project have already been structured. You are working with
your team for cost estimation of the project. Which of the following estimating techniques will you
use for the highest degree of accuracy?

A.
Parametric modeling

B.
Analogous

C.
Top-down

D.
Bottom-up

Explanation:
According to the question, you have to use the estimating technique that has a higher degree of
accuracy. The most accurate estimating technique is bottom-up estimating. What is bottom-up
estimating? Bottom-up is a cost estimating technique that involves estimating the cost of individual

work packages or schedule activities with the lowest level of detail. The detailed cost is rolled up
(or summarized) to higher levels for total project estimates. This summarized data is very useful
for reporting and tracking purposes. Bottom-up estimating provides a higher degree of accuracy,
provided the estimates at the work package level are accurate.
Answer options C, A, and B are incorrect. Parametric modeling and analogous estimating
techniques use top-down estimation model. These are less accurate than the bottom-up
estimation. What is analogous estimating? Analogous is an estimating technique that uses the
values of parameter, such as scope, cost, budget, and duration or measures of scale such as size,
weight, and complexity from a previous, similar activity as the basis for estimation of the same
parameter for a future activity. It is a top-down estimating technique and is a form of expert
judgment. It provides a lower degree of accuracy than other estimating techniques. This technique
is primarily used when there is a limited amount of detailed information about the project or
program. What is parametric modeling? Parametric modeling is an estimating technique that uses
parameters, or project characteristics, to forecast project costs. It involves a top-down approach
and is similar but more accurate than analogous estimating. It uses historical data and other
variables to calculate an estimate for activity parameters, such as scope, cost, budget, and
duration.