who become supervisors in the industry? and what is their level of growth in an industry?

Supervisor must have performance caliberation capability on whatever to be supervise the items/persons.That is not any specified designation,actually responsibility

There is no post of Supervisor in the field of Computer Science & Engineering. In Development line System Analyst take care of the developer's work. In Network Field Network Administrator do the Monitoring. In Systems System Administrator take care of this responsibility, In Database line DBA take c