Identifying Subsystems Hints Look at object collaborations. Look for optionality. ◆ Look to the user interface of the system. ◆Look to the actors ◆ Look for coupling and cohesion between classes. Look at substitution. Look at distribution. ◆Look at volatility Object Oriented Analysis and Design 10Object Oriented Analysis and Design 10 Identifying Subsystems Hints  Look at object collaborations.  Look for optionality.  Look to the user interface of the system.  Look to the actors.  Look for coupling and cohesion between classes.  Look at substitution.  Look at distribution.  Look at volatility