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Processes may be planned or unplanned.
A process planned by humans has a purpose. It is a course of action, or a procedure, to achieve a result, or an end-product. The sequence from start to finish is the plan. A plan may be written, or programmed, or just held in the mind. Examples: building a house, fighting a battle, sowing crops; organising a wedding...
Non human processes can be investigated and described. Examples: the evolution of the solar system; biological evolution; the growth of melting of ice at the Arctic; the process of development from egg to adult.
Processes often repeat whenever certain conditions hold. Example: car low on petrol/gas, visit garage and refill. Most computer programs are of this type. Processes may be circular: planets revolve around sun; eggs produce chickens, and chickens produce eggs.