 This person can be one of the busiest person during a performance, as the technical master will be needed to do tasks when the normal operator is not there, or when the person that has normally operated certain equipment has left the position for one reason or another, and needs to be replaced.In these instances technical master will be the interim operator (unless he/she appoints another person to fill the position).The technical master may also be required to step in if the normal operator has encountered a problem, and does not know how to correct it.