To understand the system start by ignoring the code. 1. Start with all the components as black boxes. 2. Draw the system design/connections/interfaces between

To understand the system start by ignoring the code. 1. Start with all the components as black boxes. 2. Draw the system design/connections/interfaces between them. 3. Follow the data and uncover black boxes by reading the code. 4. (If possible) Write tests and refactor code so that testing is possible.