80/20 analysis shows where value is concentrated. It does not explain why.
The 80/20 or Pareto principle is a practical way to test whether a relatively small share of products or customers generates most of the result. EightyTwenty+ uses that concentration as a starting point, then examines the relationships and complexity behind it.
What an 80/20 analysis tells you
Rank products or customers by revenue and compare the leading share of entities with their share of total value. The result describes concentration; it does not label that concentration good or bad.
Why the “plus” matters
Context can show that low-revenue products support major customers. Dependency can expose reliance on one relationship. Complexity can show customers whose order activity is disproportionate to revenue.
Use the result as a management question
The useful question is not simply “what is in the bottom 20%?” but “what does the concentration tell us to investigate next?”