You will design and implement and then revise and improve preventive measures and controls as your worksite changes and as your store of hazard information grows. If removal is not feasible, enclose the hazard to prevent exposure in normal operations. Where complete enclosure is not feasible, establish barriers or local ventilation to reduce exposure to the hazard in normal operations. Other good sources for hazard information updates are the ongoing job hazard analyses, process and phase hazard analyses, change analyses, and periodic comprehensive hazard surveys. Engineering controls, which attempt to eliminate hazards, do not necessarily require that an engineer design the control.
Engineering controls can be very simple.
When you can not remove a hazard and cannot replace it with a less hazardous alternative, the next best control is enclosure. While this may control employee exposure during production, it may not control exposures during maintenance. When the potential hazard cannot be removed, replaced, or enclosed, the next best approach is a barrier to exposure, or, in the case of air contaminants, local exhaust ventilation to remove the air contaminant from the workplace. Administrative controls Administrative controls include lengthened rest breaks, additional relief workers, exercise breaks to vary body motions, and rotating workers through different jobs to reduce stress or repetitive motions on one part of the body. They normally are used in conjunction with other controls that more directly prevent or control exposure to hazards.