case study

https://www.youtube.com/watch?v=jyqVHW3tVD8
https://www.youtube.com/watch?v=hAHQvFZuyxY
https://www.youtube.com/watch?v=ugtFJGRTx_Y
https://www.youtube.com/watch?v=vOO1oArlVbM
http://www.etips.info/docs/ParticipantHandout_StepByStepGuide.pdf
http://www.etips.info/