a. Validator shows very good performance for the last week, but it works only for 2 weeks already, so our algorithm will not choose this validator, because it doesn't have month and year history yet.
b. Validator showed average performance last week, but for the last 3 months it had very good APR, then our algorithm will choose this validator.
c. Validator generated a very high APR as a result of the last month, but it was already slashed once any time before. In this case the algorithm will not choose this validator because of slashing risks.
d. Validator shows great performance but is being elected to the active set only once a week. The algorithm will not choose this validator, because its activity is very low, which means low APR in the long term.
Validators that passed the selection process during the first stage of deployment for review: link