Mechanical aptitude, mathematical ability, analytical ability, hand-eye coordination and manual dexterity are required. Keyboard skills are important for computer use. Operators usually enjoy working on their own and with others, doing precise work, making decisions and solving problems. Most people work 40 hours per week, though overtime might be required. The structure of a 40-hour week may vary from operation to operation.
Some people work twelve-hour shifts with four days on, rotating with four days off.
Some plants and companies operate on shifts during days, nights and weekends. These workers are employed in various environments, and some workplaces can be noisy, dirty and dusty. Workers may be exposed to the hazards of toxic, flammable or explosive chemicals and gases. Avoiding injury becomes easier with experience, but there are many other preventive factors that are extremely important. Workers must be cautious and use proper safety measures.