Decision Making Decision method

Pareto Analysis

Shows which categories contribute most to the measured total burden.

Pareto Analysis orders consistently measured categories by contribution and adds their cumulative distribution. It reveals concentrations for further investigation, while rank alone does not establish cause.

Core question

Which categories contribute most to the measured total burden?

Plan Method guide

Start comparison

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Participants: 1-6 participants
Time: 30–60 minutes with prepared data

Set measurement basis
Set measurement basis
Choose one unit and period; define categories and assign every case once.
Total and sort
Total and sort
Add values per category, calculate the total and sort categories descending.
Calculate shares and curve
Calculate shares and curve
Share = value / total × 100; cumulative = running sum / total × 100. Round only for display.
Focus investigation
Focus investigation
Select the largest actionable contributions and agree a cause investigation with an owner.

Repeat the same measurement logic after a targeted intervention; compare rates as well if volume changes.

A good fit when

For recurring defects, costs or volumes with reliable data.

Ideal for

Quality improvement
Backlog triage
Operational focus

Not good for

Exploratory ideation without data
Complex tradeoffs with many criteria

Outputs

Pareto table and chart
Descending category table and Pareto chart with value, share, cumulative share and a justified investigation focus.
Justified investigation brief
The analysis brief defines the later impact check on the same measurement basis and also considers severity and exceptions.

Pareto Analysis· worksheet

Fictional example

Pareto analysis orders consistently measured categories by contribution and adds their cumulative distribution. It reveals concentrations for further investigation. Rank alone does not establish cause.

Pareto Analysis· worksheet
Rank	Item	Value (cases)	Share (%)	Cumulative (%)
1Enter category and measurements; calculate from unrounded values.	Login access	58	39.7	39.7
2Enter category and measurements; calculate from unrounded values.	Payment status	39	26.7	66.4
3Enter category and measurements; calculate from unrounded values.	Course navigation	25	17.1	83.6
4Enter category and measurements; calculate from unrounded values.	Other	24	16.4	100

1. Item
1
Login access
2
Payment status
3
Course navigation
4
Other
2. Value (cases)
1
58
2
39
3
25
4
24
3. Share (%)
1
39.7
2
26.7
3
17.1
4
16.4
4. Cumulative (%)
1
39.7
2
66.4
3
83.6
4
100

Fictional: 146 cases. Share = value / 146 × 100. Cumulative = running sum / 146 × 100; 122 / 146 = 83.6%. Round only for display.

ASQ: Pareto Chart

First step

Agree metric, period and mutually exclusive categories; prepare complete raw data.

Open the method guide

Good to do first

Operations

Fishbone Diagram

Supplies the cause categories that get tallied in the Pareto chart.

Where to go next?

Operations

5 Whys

Digs into the largest contributor with a cause chain down to the root cause.

Operations

A3 Problem Solving

Structures work on the largest contributor as an A3 problem-solving effort.

Deep dive

Purpose

In many problem situations, effect is distributed unequally across many causes. A Pareto Analysis separates the few drivers with high leverage from the long remainder and focuses attention on what measurably moves the needle.

How it works

Causes or contributions are sorted by their share of effect and viewed cumulatively. The curve reveals where a few factors explain most of the problem or potential. The analysis shifts attention from breadth to leverage.

In detail

Pareto Analysis is strong when many causes or cases produce unequal amounts of effect. Comparable data and a deliberate counting or weighting unit matter more than the well-known 80/20 formula. The approach pays off once a few drivers are prioritized and then checked against effect.

Facilitation

Make sure the cases under review were counted or assessed comparably before a ranking emerges. The analysis becomes relevant when a few causes explain a large share of the effect and are also influenceable at the same time. Document at the end the main drivers, their data basis, and the intervention that gets checked first.

The method guide walks execution through 4 phases, timing, 4 pitfalls, and clear stop criteria.

Open method guide

Your perspective

Does this method help with your work?

Your feedback helps shape the next improvements to methodatlas.

Sources and topics

Topics

Prioritization Quality Focus Root cause

Sources

ASQ: Pareto Chartasq.orgProfessional society: metrics, sorting, bars and cumulative shares.

In playbooks

Conduct Root Cause InvestigationMove from symptom to contributing causes, patterns, and effective countermeasures.

Artifact templates

Pareto Analysis: WorksheetAgree metric, period and mutually exclusive categories; prepare complete raw data.

markdown

pareto-analysis-working-template.md

Agree metric, period and mutually exclusive categories; prepare complete raw data.

Pareto Analysis: Worksheet

Question

To be confirmed

Desired outcome

To be confirmed

Scope

Complete cycle Time: 30–60 minutes with prepared data

Complete this worksheet on paper or in your own document during the work.

Preparation for this scope

Method setup

Materials: Raw data with category and measurement; table or spreadsheet for totals, shares and cumulative shares.
Roles: Data analyst, process owner and category expert.
Advance information: Agree metric, period and mutually exclusive categories; prepare complete raw data.
Overall time needed: 30–60 minutes with prepared data
Setup: Preserve raw data unchanged; prepare an analysis table and adjacent bars with a cumulative percentage line.

Prepare for the work steps

Set measurement basis: Set measurement basis

Raw data
Category definitions

Total and sort: Total and sort

Reviewed measurement basis

Calculate shares and curve: Calculate shares and curve

Contribution table
Positive total

Focus investigation: Focus investigation

Pareto distribution
Ability to intervene

Pareto Analysis· worksheet

Rank	Item	Value (cases)	Share (%)	Cumulative (%)
1
2
3
4

1: Enter category and measurements; calculate from unrounded values.
2: Enter category and measurements; calculate from unrounded values.
3: Enter category and measurements; calculate from unrounded values.
4: Enter category and measurements; calculate from unrounded values.

Record metric, period and total. Share = value / total × 100; cumulative = running sum / total × 100. Sort descending; for ABC also define thresholds and the boundary rule.

ASQ: Pareto Chart

Set measurement basis: Set measurement basis

Expected artifact: Reviewed measurement basis

Are all values measured using the same rule?

Entry:

...

Are all values measured using the same rule?

Total and sort: Total and sort

Expected artifact: Descending contribution table

Does the total reconcile with the raw data?

Entry:

...

Does the total reconcile with the raw data?

Calculate shares and curve: Calculate shares and curve

Expected artifact: Pareto distribution

Does the curve end at 100% without adding rounded shares?

Entry:

...

Does the curve end at 100% without adding rounded shares?

Focus investigation: Focus investigation

Expected artifact: Justified investigation brief

Is focus data-based without claiming causation?

Entry:

...

Is focus data-based without claiming causation?

Open questions and next steps

...

Method guide: https://methodatlas.meierhoff-systems.de/en/methods/pareto-analysis/run-sheet

Alternatives and neighbors

Fitting alternatives with decision guidance, followed by other related methods.

All methods

Operations

ABC Analysis

Instead of Pareto Analysis, when you want to reliably order processes, responsibilities, or risks in operations with as direct a connection to reality as possible, and for strategic classification and positioning.