Kurs i rorårsaksanalyse

Root cause analysis


This course teach you how to identify, prove and solve true root causes to ensure lasting results. The course follows Six Sigma's DMAIC, with main focus on Measure & Analyze phase.


Lean Tech offers virtual and physical classroom training:


The course follows DMAIC

  • Define: Understand problem 
  • Measure: Identify possible causes
  • Analyze: Prove true root causes
  • Improve: Solve root causes
  • Control: Create lasting solution

Day 1

  • Structured problem solving
    • Lean Six Sigma & DMAIC
  • Define the problem
    • Problem statement
    • Thought Map & SIPOC
  • Understand current situation
    • Collect data and facts
    • Use statistics to make sense of data (center, spread and distribution)
    • Statistical Process Control (SPC)
    • Capability and problem-solving strategy
    • Set specific goals
  • Identify potential causes
    • Process mapping
    • Brainwriting, Brainstorming, Fishbone and 5 Whys

Day 2

  • Prove root causes
    • Observation
    • Turn on / off
    • Graphical analysis:
      • Histogram
      • Pareto
      • Run Chart
      • Box plot
      • Scatterplot
    • Correlation
  • Evaluate solutions and implement the best ones
  • Follow-up to ensure lasting result

Practical exercises

Galton board

We use a Galton board during the training to understand normal and special variation, basic statistics and histograms.

We will also use it for practical exercises and to generate data.

The Galton board provides a good visual understanding of what happens if you overreact to normal variation.

The exercises can be customized based on the need of the company and your own data can be used.

Webmeeting 1

You learn to use an A3 template to solve problems.


  • Structured problem-solving; A3, PDCA, DMAIC & 8D
  • Introduction to Lean Six Sigma
  • Review of A3 with practical assignments:
    • Describe background and set the right scope
    • Measure the current situation
    • Set a goal
    • Understand Y = f (x)
    • Understand the terms symptom, problem, and root cause
    • Brainstorm potential causes and group them in a Fishbone
    • Make causes measurable and prioritize
    • Use 5 Whys to find true root causes
    • Prove root cause using observation and turning on / off
    • Evaluate, prioritize & implement solutions
    • Follow up to ensure lasting results

Webmeeting 2

You learn how to use Control Charts to understand variation and respond correctly to measurement results.


  • Introduction
  • Process mapping to understand variation
  • Normal and special cause variation
  • Introduction to Control Charts
  • Normal distribution & probability
  • How to interpret a Control Chart
    • Stability
    • Sign of Special Cause variation
    • Compare control limits and customer specifications
  • Practical applications of Control Charts
  • How to determine Capability (how well the process meets customer requirements)
  • Strategies to improve Capability

Webmeeting 3

You learn fact-based techniques to prove root causes (Analyze phase of DMAIC).


  • Practical and statistical significance
  • Continuous and discrete data
  • Prove root causes:
    • Observation
    • Turn on/off
    • Graphical analyses:
      • Histogram
      • Pareto Chart
      • Run chart
      • Box plot
      • X-Y chart / Scatter plot
    • Correlation

Practical information

Courses can be arranged on request and customized to your business needs.

Your own data can be used in examples and exercises. 

Open courses are arranged according to the Course Calendar.

You can start e-learning when you want. You have access for a year and unlimited attempts to successfully complete multiple-choice exam.

Lunch, refreshments, and drinks during classroom training are included, and you receive a course completion certificate.


Course location varies; check "Place" in Course Calendar.

Lean Tech is located at Igloo Innovation at SNØ (Snøfonna 5, 1470 Lørenskog) and organizes courses here.

We have an agreement with Thon Hotels and organize courses in other locations as needed.



rsz img 3561 til sissel

Sissel Pedersen Lundeby is IASSC (International association for Six Sigma certification) accredited trainer associate:

"This accreditation publically reflects that you have met the standards established by IASSC such that those who participate in a training program led by you can expect to receive an acceptable level of knowledge transfer consistent with the Lean Six Sigma belt Bodies of Knowledge as established by IASSC."

Sissel has a Master in Chemical Engineering and more than 20 years' experience within manufacturing and environmental technology. She has practiced Lean Six Sigma since 2002, completing Black Belt projects and certification through Cytec (2004) and IASSC (2017).

She use Lean Six Sigma to create measurable results and want her course participants to be successful improving their processes. That's why her training focus on practical application.


"Inspiring, professionally competent, popularize a theoretical discipline"

Espen Fjeld, Commercial Director at Berendsen

"Academic highly skilled and clear performance. Fun and builds trust"

Jon Sørensen, Production Manager at Berendsen

"10/10 good at reaching everyone"

Erlend Stene, Sales leader at Berendsen

"Clear and well presented. Good at asking questions and listen (check understanding)"

Morten Bodding, Production Manager at Berendsen

"Made a difference, engaged and skilled"

- Participant from EWOS

"You are inspiring, positive and professionally skilled"

- Participant from EWOS

Anonymous feedback:

"Clear presentations and well explained"

"I thought it was very rich, with good examples that made me reflect"


Contact info

Lean Tech AS | Snøfonna 5

0047 481 23 070

This email address is being protected from spambots. You need JavaScript enabled to view it.

Lørenskog, Norway


L - Look for solutions

E – Enthusiastic

A – Analytical

N - Never give up

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