1. procedure, process

a particular course of action intended to achieve a result

Example Sentences:
'the procedure of obtaining a driver's license'
'it was a process of trial and error'

• process

2. operation, procedure

a process or series of acts especially of a practical or mechanical nature involved in a particular form of work

Example Sentences:
'the operations in building a house'
'certain machine tool operations'

• operation

3. function, procedure, routine, subprogram, subroutine

a set sequence of steps, part of larger computer program

• function
• routine
• subprogram
• subroutine

4. procedure

a mode of conducting legal and parliamentary proceedings