Dimensional analysis is a powerful tool which allows scientists to do which of the following $($multiple answers are allowed$)$:

a$.$

Decrease the number of variables to a given problem.

b$.$

Highlights the important physics of the problem which can make the analysis easier$/$tractable$.$

c$.$

Potentially use scaled models to make experiments easier.

d$.$

It is possible to plot a wide range of data on a single plot which can be useful in establishing trends for prediction purposes.