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Lean Six Sigma ToolsData-driven tools from define to control

Lean six sigma tools combine lean's focus on flow and waste with six sigma's focus on variation. Most practitioners use them within DMAIC: define, measure, analyze, improve and control.

See 5 categories How to choose

5 categories

What's in lean six sigma tools

This hub covers the software side of lean and six sigma tools. Value stream mapping software supports define and analyze. Six sigma statistics packages handle measure and analyze, and FMEA software assesses risk.

SPC and CAPA software hold the gains in the control phase. If you want to learn the methods themselves, see the lean tools library and the certification and training category.

  1. 01

    SPC Software

    “Catch the drift before the defect.”

    Control charts and capability studies for process measurements.

    3 tools listed
  2. 02

    Six Sigma Software

    “Prove the cause with data.”

    Statistical analysis and DMAIC project tools for improvement teams.

    3 tools listed
  3. 03

    Value Stream Mapping Software

    “Map the flow, find the waste, design the future.”

    VSM, process maps and simulation.

    4 tools listed
  4. 04

    CAPA Software

    “Close the loop for good.”

    Manage corrective and preventive actions from issue to verified fix.

    3 tools listed
  5. 05

    FMEA Software

    “Find the failure before the customer does.”

    Build and maintain FMEAs that stay linked to real controls.

    3 tools listed

Lean Six Sigma tools by DMAIC phase

Define: a project charter, a SIPOC diagram and a value stream map set the scope and the current state.

Measure: a measurement system analysis, often a gauge R&R study, checks the data before you trust it. Baseline capability follows.

Analyze: fishbone diagrams, five whys, hypothesis tests and regression narrow down the causes.

Improve: designed experiments, poka-yoke and SMED test and install solutions. FMEA checks the new process for fresh risks.

Control: control charts, a control plan and standard work hold the gain. CAPA handles anything that drifts. The DMAIC page covers each phase, and the Six Sigma guide explains the method and the belts.

When a spreadsheet stops being enough

Spreadsheets handle basic charts and simple capability numbers. They get slow and error-prone for designed experiments, regression with many factors and gauge studies.

Six Sigma software packages these analyses with guided menus. SPC software adds live data collection and alerts on the line.

The NIST/SEMATECH e-Handbook of Statistical Methods is a free reference for the statistics behind control charts and capability.

Where 5S fits in Lean Six Sigma

5S is a lean tool, not a Six Sigma one, but Lean Six Sigma programs often use it. A stable, organized workplace reduces variation before any statistics start.

See 5S for the method and lean vs Six Sigma for how the two approaches combine.

At a glance

Software by DMAIC phase

CategoryDMAIC
Value stream mapping
Six Sigma statistics
FMEA
SPC
CAPA
A filled dot marks a phase where the category does most of its work. A ring marks occasional use.

The five categories side by side

CategoryMain DMAIC phasesTypical userWatch for
Value stream mappingDefine, AnalyzeProject leadMaps that never get updated
Six Sigma statisticsMeasure, Analyze, ImproveGreen or Black BeltAnalyses run on unchecked data
FMEA softwareImprove, ControlQuality engineerRisk scores without actions
SPC softwareMeasure, ControlQuality and operatorsCharts nobody reacts to
CAPA softwareControlQuality managerActions closed without a check

Before you shortlist

How to choose lean six sigma tools

  1. 1

    Map tools to DMAIC phases

    List which phases your projects struggle with most. A team weak at control needs SPC and CAPA, not another statistics package.

  2. 2

    Match statistical depth to users

    Black belts need regression, DOE and capability studies. Green belts and operators need guided analysis and clear charts that they can read without help.

  3. 3

    Check data connections

    SPC is only as good as its data feed. Confirm the tool can read from gauges, machines or your quality system without retyping measurements.

  4. 4

    Consider regulatory needs

    In regulated industries, CAPA and FMEA tools may need audit trails, electronic signatures and controlled documents. Confirm these before you shortlist anything.

The methods behind the software

Learn the lean tools first

FAQ

Lean Six Sigma Tools: common questions

What are the main lean six sigma tools?
Common ones include value stream mapping, SIPOC, fishbone diagrams, five whys, FMEA, control charts, capability analysis, hypothesis tests and poka-yoke. Most are used within the DMAIC cycle.
Are lean sigma tools different from lean six sigma tools?
No. Lean sigma, lean 6 sigma and lean six sigma all describe the same combined approach. The tools and software categories are the same whichever name you search for.
Do I need statistical software for lean six sigma?
For green belt and black belt projects, usually yes. Spreadsheets can handle basic charts, but capability studies, DOE and regression are faster and less error-prone in dedicated software.
Which lean and six sigma tools help sustain results?
Control-phase tools do this work: SPC charts, control plans, standard work and CAPA. They detect drift early and force a documented response when a process goes out of control.
Is FMEA a lean tool?
FMEA comes from reliability engineering rather than the Toyota Production System. Lean Six Sigma projects use it, mostly in the Improve and Control phases, to rank risks before they cause defects.
Which tools are used in each DMAIC phase?
Define uses a charter, SIPOC and a value stream map. Measure uses measurement system analysis. Analyze uses fishbone and statistics. Improve uses experiments and poka-yoke. Control uses control charts and standard work.

Sources

Written by the lean-stack editors following our methodology. Updated October 3, 2026.

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