A Pareto analysis chart is used to identify and rank the most important categories based on the principle that 80% of effects come from 20% of causes. By conducting a spend analysis and using a Pareto analysis chart, the supply manager can determine which categories account for the majority of the company's spending. This helps in prioritizing efforts and resources towards the most impactful categories.

References

Juran, J.M. (1989). Juran on Leadership For Quality: An Executive Handbook.

CIPS (Chartered Institute of Procurement & Supply). Spend Analysis and Pareto Principle.