• Input involves capturing and assembling elements that enter the system to
be processed . For example : raw materials energy , data and human effort
must be secured and organized for processing .
• Processing involves transformation processes that convert input in to
output . examples are a manufacturing process the human breathing process
or mathematical calculations .
• Output involves transforming elements that have been produced by a
transformation process to their ultimate destination ,For example , finished
products ,human services , and management information must be
transmitted to their human users .