A good characterization of the main variables affecting a strike can lead to an improved operation of any type of pan. On-line monitoring of crystal growth performed by ITECA' new generation of microscopes provides a better knowledge of those variables, which are essential for achieving highest yield and cost effective production of homogeneous crystals. The paper describes and discusses digital microscope operation at different stages of the process (i.e. before seeding, at the seeding stage and during graining phase). A particular attention must be paid to the location of the microscope onto the pan: it has to be mounted in front of a representative area to provide good monitoring of the crystallization and valuable statistical information, especially in the first stages of the process. This new tool has become indispensable for creating standard strikes - the ultimate goal being to achieve full automation of the pan operation.
