Part: It is an individual component or part used to perform repair or maintenance services.  The customer will be charged for the parts used in a service. E.g., a thermostat for AC repair services, emulsion paint for painting services. A part can also be something that you sell. E.g., Air Conditioner

In Zoho FSM, you add the necessary parts as line items while creating a work order or estimate.

Asset: Refers to a part instance that has been sold to customers and is now owned by them. E.g. Consider a company selling or renting out appliances like Air Dryers, Air Coolers, Filter Systems, etc and providing repairs and maintenance after that. They will add each of their sold product as an asset in Zoho FSM.

For an asset, you can create Requests, Estimates, Work Orders, and Scheduled Maintenances in Zoho FSM.

Equipment: An Equipment is a tool or vehicle that is owned by a field services organization and is utilized to perform various field services. E.g., power tools, diagnostic and testing equipment, vehicles, etc. Vacuum pump, Leak detector, etc are some of the equipments used for AC repair.

In Zoho FSM, you can add equipments to crews and territories and assign them to service appointments just as you will a field agent.