Replace the unsafe item with a safe item. Example - Replace a poor quality grinder stone with a high quality grinder stone. Enclose the hazard. Example - Place a hood over a source of noisy printer. Substitute an unsafe item with different item.
Engineering controls remove the hazard itself.
Safety managers employe these control strategies to eliminate or reduce the frequency and duration of exposure to hazards. Effective design and implementation of safe work procedures and practices. Manage work schedules . These strategies include job rotation, breaks, shift work, etc. As you might have guessed, these control strategies are less effective in the long term than engineering controls because they do not remove the hazards, themselves.