SKIF have a defined system of kumite which increases in complexity as you move through the ranks. there are several types of kumite, but the common ones are:
Gohon kumite (5 step)
Sanbon kumite (3 step)
Kihon ippon kumite (1 step basic)
Jiyu ippon kumite (1 step semi free)
Jiyu kumite (free sparring)
There is a numbering system used at each level relating to a particular technique or combination of techniques. This numbering system makes it easier to identify and teach (as well as assess) the various combinations. As you develop in your karate you naturally gravitate towards the techniques which suit your body, style and movement.