Method; process (6)
I believe the answer is:
system
I believe this is a double definition.
'method' is the first definition.
(I know that system is a type of method)
'process' is the second definition.
(I've seen this before)
(Other definitions for system that I've seen before include "Method of organization" , "Operating structure" , "Method of operating" , "Set of things in a connected whole" , "Organised whole made up of related parts" .)