Process or method (9)
I believe the answer is:
procedure
This clue is a double definition.
'process' is the first definition.
(I know that process can be written as procedure)
'method' is the second definition.
(I know that method can be written as procedure)
(Other definitions for procedure that I've seen before include "Set sequence of events to achieve a result" , "Established way of working" , "Established way of doing something" , "System for accomplishing something" , "way to get things done" .)