80:20 Who uses What, What do you Really have to Deliver
Another well-known 80:20 rule in software is that 80% of users only use 20% of features. This came out of research from the Standish Group back in 2002, where they found that:
- 45% of features were never used;
- 19% used rarely;
- 16% sometimes;
- only 20% were used frequently or always.