Nonnumeric project selection methods are suitable when numeric methods are not available.
The statement 'Nonnumeric project selection methods are only suitable if numeric methods are not available' is true.
Nonnumeric project selection methods, such as scoring models or decision matrices, are used when quantitative data or numeric methods are not available or applicable.
For example, if a project involves subjective criteria or qualitative factors that cannot be easily measured or quantified, nonnumeric methods may be more appropriate in making project selection decisions.