Do you have the perfect technique? Or do you have unknown floors or 'tells' that may not be apparent to the human eye? With the aid of high-speed cameras it is possible to slow down the motion of combat movements so that any imperfections can be seen and your technique adjusted appropriately.
In the video below both coach and boxer were unaware of the pre-punch movement (this is a more extreme example). After analysis of the video the boxers training was tailored to remove this pre-punch 'tell'. This resulted in a much quicker punch delivery and less chance of the opponent realising that a punch was coming.