  We studied five methods to include anisotropy, or unequal stress
distributions, in general relativistic matter configurations. We used nine
acceptability conditions that the metric and physical variables must meet to
determine if our models were astrophysically viable. Our analysis found the
most effective way to introduce anisotropy while keeping a simple density
profile. We also found a practical "rule of thumb" that relates the density at
the boundary to the density at the centre of relativistic matter distributions.
Additionally, we calculated the configuration radius and encountered that
values observed by NICER for PSR J0740+6620 are consistent with several
acceptable matter configurations, both isotropic and anisotropic.
