the action of writing the score and arranging the instrumentation of a musical composition that is to be performed by an orchestra;
e.g. This composer arranged my favorite orchestration of the symphony.
(noun)
the harmonious and often secretive planning, organization, or coordination of a system or situation (or its various elements) in order to produce a desired effect;
e.g. Thanks to her brilliant orchestration, they were able to execute their plan without any difficulties.