The method I use to differentiate between On Base and Home Run is based on a two-tiered system. On Base means the referral sale was within a general monetary range. Comparatively, a Home Run sale exceeds the general range and/or it was repeat business.  What makes a Grand Slam different from a Home Run is based mainly on the size of the sale. I rate a sale as Grand Slam when it generates money above expectations. A Grand Slam does not happen often and it typically exceeds normal standards of business. Approximately 75% of my sales are On Base, while 20% are Home Runs and 5% are rated Grand Slams. That ratio has changed since I joined PowerCore more specifically for Home Run business sales.