instrumentation

(noun) an artifact (or system of artifacts) that is instrumental in accomplishing some end. Synonyms: instrumentality.

(noun) the act of providing or using the instruments needed for some implementation.

(noun) the instruments called for in a musical score or arrangement for a band or orchestra.

(noun) the act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments. Synonyms: orchestration.