adjective

designed to correct or counteract something harmful or undesirable.

management were informed so that corrective action could be taken

remedial,therapeutic,restorative,curative,reparatory,reparative,rehabilitative,ameliorative,correctional,punitive,penal,disciplinary,disciplinarian,castigatory,reformatory,penitentiary,punitory,castigative

noun

a thing intended to correct or counteract something else.

the move might be a corrective to some inefficient practices within hospitals