Preparation and Administration (Pr) Undetectability (U) Speed of Effect (Sp) Safety to Others (Sa) Storage - Shelf Life (St) Legality (L)
In the RPA test, a score of 1-5 is given for each of these secondary characteristics.
Preparation and Administration (Pr - 5)
Simplicity of preparation and administration is an important factor. No one wants to use complicated equipment that is difficult to assemble or drugs that are hard to use.
Undetectability (U - 5)
Methods that leave no obvious trace are strongly preferred. In reality, this might mean that an attending physician will be more likely to assume that the death has been caused by a known underlying disease. does not arise.
Speed of Effect (Sp - 5)
Speed of death is a further significant factor. Speed limits the likelihood of discovery and any possible interference (resuscitation).
Safety to Others (Sa - 5)
Most seriously ill people do not want to die alone. Methods that present a danger to others are unpopular for this reason.