Outcome vs Output

It confuse me, often, the term outcome and output.  Whats the different between two?  Some people would simply said output is product and outcome is result.

It still confuse me, alright.  But thats until i stumble myself to this site created by Richard Gaunt in London and Glenn O’Neil in Geneva.  The website said:

Output is usually a poor measure for performance, as it represents the products or services produced. It is just like..

A press officer judges her performance by the number of press releases she writes
A training office judges his performance by the number of people that attends his training sessions

A press officer should judge her performance by how her press activities change the knowledge and attitudes of audiences
A training officer should judge his performance by how the people he trains uses what they have learnt

What is far more important are outcomes - the effects and changes that are a result of the outputs:

A press officer should judge her performance by how her press activities change the knowledge and attitudes of audiences
A training officer should judge his performance by how the people he trains uses what they have learnt

Thank you to Richard and Glend for your enlightment.  

Cheers,