procedure

(n) a particular course of action intended to achieve a result
- the procedure of obtaining a driver's license
- it was a process of trial and error
process,
(n) a process or series of acts especially of a practical or mechanical nature involved in a particular form of work
- the operations in building a house
- certain machine tool operations
operation,
(n) a set sequence of steps, part of larger computer program subprogram, subroutine, routine, function,
(n) a mode of conducting legal and parliamentary proceedings

process operation subprogram subroutine routine function