This impact of tiering on new patient visits is consistent with economic theory and common sense: unknown physicians are more likely to be viewed by patients as substitutable than physicians with whom patients have a relationship.
We observed that the effect of tiering may be at the lower end of the distribution rather than moving patients to the "best" performers.
Look to start with operational practices tiering
classes of storage device or data protection.
Many business managers have adopted a simple form of tiering
for years through the service level agreements (SLAs) requiring IT staffs to provide certain levels of application performance to end users.