ASQ Pocket Guide to Root Cause Analysis
By Bjørn Andersen and Tom Fagerhaug
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About this ebook
The purpose of this pocket guide is to provide you with easily accessible knowledge about the art of problem solving, with a specific focus on identifying and eliminating root causes of problems.
Root cause analysis is a skill that absolutely everybody should master, irrespective of which sector you work in, what educational background you have, and which position in the organization you hold. The content in this little pocket guide can contribute to disseminating this skill a little further in the world.
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ASQ Pocket Guide to Root Cause Analysis - Bjørn Andersen
Introduction
Welcome to the pocket guide to root cause analysis! The purpose of this guide is to provide you with easily accessible knowledge about the art of problem solving, with a specific focus on identifying and eliminating root causes of problems. This is a skill that absolutely everybody should master, irrespective of which sector you work in, what educational background you have, and which position in the organization you hold. We hope this pocket guide can contribute to disseminating this skill a little further in the world.
We have previously published two traditional books on the subject of root cause analysis. One, an introduction to RCA, is in its second edition. The other deals with RCA in the healthcare sector specifically. Both were designed to provide practical instruction and advice on how to undertake real-life root cause analyses. It seems logical to take the next step and provide a pocket guide that builds on these books. The strengths of a pocket guide are several: compact presentation of the material, a handy format, and easy access to templates for tools, to name just a few. Readers who are familiar with the original books will find additional value in this pocket guide.
The guide is divided into three main sections:
1. Section one provides a brief introduction to root cause analysis and outlines the RCA process.
2. Section two presents the six steps of the RCA process in detail and describes substeps and available tools and techniques used to accomplish each of these.
3. Section three concludes the guide by giving an example of an RCA project from a manufacturing company.
A pocket guide built on a proper
book is by definition a condensed version of the original, and our aim for the adaptation has been to preserve a complete overview of the RCA process from start to finish. We often see that potentially successful RCA projects fail when teams charge ahead too quickly and overlook pieces of the puzzle or fail to bring the project to completion by implementing solutions and improvements. We believe this full process view is important.
Another aim has been to make as accessible as possible the various tools and techniques that constitute an important part of RCA skills. You will notice that we provide little preamble or discussion about the tools, but rather give recipe-like
instructions. If you feel the need to understand more about parts of the RCA process or the approaches employed at
the various stages, we suggest our book Root Cause Analysis: Simplified Tools and Techniques, Second Edition, ASQ Quality Press, 2006.
2803.pngSection I
ROOT CAUSE ANALYSIS
All organizations experience unintended variation and its consequences. Such problems exist within a broad range of scope, persistence, and severity across different industries. Some problems cause a minor nuisance, others leads to loss of customers or money, and still others can be a matter of life and death. Anyone will agree that in most cases, preventing problems is preferable to dealing with the consequences of them.
Recurring problems stand out as sore thumbs
that are most in need of prevention efforts, and root cause analysis can be the key. Examples of problems include:
• A sawmill periodically suffered severe problems of accuracy when cutting lumber to specified dimensions. Experts proposed varying theories as to causes, but
the problems persisted. After thoroughly assessing
the situation, the parties assigned to pinpoint the reasons for the deviations found the cause to be
highly varying air temperature and humidity due to a poorly functioning air conditioning unit.
• Dimensional variation among lamp holders from certain suppliers caused a lot of rework for a lamp manufacturer. Adjustments that needed to be made to ensure proper installation were estimated to cost more than $200,000 annually. Meanwhile, the procurement manager was pleased with himself because he had managed to reduce purchasing costs by about $50,000 the previous year by buying from suppliers that offered the lowest price.
While the terms root cause and root cause analysis have become part of our business lingo, both carry more meaning than you might expect and both can range broadly in regard to how comprehensively they are perceived. To start with, root cause analysis can be and is practiced as one of two extremes and every shade in between:
• It can be a perfunctory, tedious, form-driven, post–adverse event exercise performed to satisfy some bureaucratic requirement, stealing time and resources that should have been spent doing real work, and not making any difference whatsoever in terms of business results, when we should have just fired the perpetrator of bad practice.
• It can be a motivating, fulfilling, creative exercise initiated because an astute and responsive manager or employee discovered vulnerability in a practice and called together a team to change the process and thereby prevent future negative consequences from recurrence of the problem.
In terms of scope and extent of an RCA project, there can be large variation. A couple of colleagues can easily complete a limited root cause analysis exercise in a few days, changing a faulty practice and solving a problem. The typical project lasts some weeks and involves a small RCA team. Extreme cases can last months or even a year, but these address highly complex problems often requiring investment, organizational change, and training before the root cause is banished. A special type of RCA project is triggered in cases where serious accidents with severe damage to infrastructure, injury, or death have occurred; these often take on the nature of an investigation
(as in a police-type investigation). Although