Definitions of Preventive maintenance & Troubleshooting

· Preventive maintenance is a regular and systematic inspection, cleaning, and replacement of worn parts, materials, and systems. Preventive maintenance helps to prevent failure of parts, materials, and systems by ensuring that they are in good working order.

· Troubleshooting is the process of diagnosing the source of a problem. It is used to fix problems with hardware, software, and many other products.