Pareto principle for leaders: focus on the vital few

The Pareto principle says that a small share of causes often produces most of the results. A common rule of thumb is 80 percent of results from 20 percent of causes. For a leader, it is a simple prompt: find the few things that matter most and give them your best time.

This guide explains where the idea comes from, how to apply it in a week, and where it can mislead you.

Sources: Wikipedia, "Pareto principle" (definition and rule of thumb).

Where the idea comes from

The idea is named after Vilfredo Pareto, an Italian economist. In his Cours d'economie politique, published in 1896 and 1897, he described how land in Italy was held by a small share of the people. The often repeated version is that about 20 percent of the population owned about 80 percent of the land. In 1906, while teaching at the University of Lausanne, he wrote about the 80 to 20 link.

Pareto was describing wealth, not management. The management use came later. In 1941, the quality expert Joseph M. Juran read Pareto's work and applied it to quality problems. He saw that a few causes created most defects. He called them "the vital few" and the rest "the trivial many." Later he preferred "the useful many," so that people would not treat the rest as worthless.

Sources: Wikipedia, "Pareto principle"; Wikipedia, "Joseph M. Juran."

What the rule really says

The rule is about imbalance. Effort, causes and results are rarely equal. A few items carry most of the weight, and many items carry little.

The numbers 80 and 20 are not a law. The real split can be closer to 90 and 10, or 70 and 30. Do not force your data into 80 and 20. Use the idea to ask a better question: which few items are doing most of the work here?

Sources: Wikipedia, "Pareto principle" (the ratio is a rule of thumb, not an immutable law).

How to find your vital few

You can do this with a spreadsheet and one hour. Follow these steps.

Pick one result. Choose something you can count, such as revenue, support tickets, delays or hours lost.
List the causes. These might be customers, products, tasks, suppliers or error types.
Add up each cause. Record how much of the result each one adds.
Sort from largest to smallest. Work down the list and total as you go.
Mark where most of the total is reached. The items above that line are your vital few.

Quality teams draw this as a bar chart, called a Pareto chart, with the biggest bars first. A plain sorted table works just as well for most leaders.

Sources: The steps are the editors' own practical method, based on standard Pareto analysis.

Three places to use it this week

Your time. List your tasks from the past two weeks. Mark the few that moved a goal forward. Protect time for those and cut, delegate or shorten the rest.

Your customers. Sort customers by revenue. In many firms a small group brings in most of the sales. Know who they are and check that they are well served. Also check how dependent you are on them, since losing one could hurt.

Your problems. Count complaints, defects or delays by type. Fix the biggest type first. One fix to a top cause can remove more trouble than ten fixes to small ones.

Sources: Editors' practical suggestions. The pattern of a few causes behind most defects is from Juran's quality work, as described in Wikipedia, "Joseph M. Juran."

Limits you should respect

The first limit is that small problems can grow. An issue that looks minor today may become a big one. If you only chase the top items, you may miss it. Pair this method with regular checks on the smaller items.

The second limit is that the rule uses past data. It tells you what drove results before, not what will drive them next. A new product or a market shift can change the list.

The third limit is people. A task can be small in numbers but important for trust, safety or morale. Do not drop work only because it ranks low. Juran's own change from "trivial" to "useful" is a good reminder that the many still matter.

Sources: Wikipedia, "Pareto principle" (limits of Pareto analysis; rule of thumb); Wikipedia, "Joseph M. Juran." The advice on people and trust is the editors' view.

A simple next step

Choose one result you care about this month. Build the sorted list described above. Circle the top few items. Then ask two questions: what should I do more of, and what can I stop? Repeat the exercise each quarter, because the vital few change over time.

Sources: Editors' practical suggestion.

Sources

Wikipedia, "Pareto principle," https://en.wikipedia.org/wiki/Pareto_principle
Wikipedia, "Joseph M. Juran," https://en.wikipedia.org/wiki/Joseph_M._Juran