30/70 Rule Explained: When to Use a 70/30 Split
By Betsy Hill and Roger Stark Editor’s Note: This is part one of a two-part series. Businesses often talk about the 80/20 rule—20 percent of customers produce 80 percent of revenue, or 20 percent create 80 percent of service calls. A similar pattern appears in education, but our observations suggest a different ratio: … Read more