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Root cause analysis

RCA, 8D reports and CAPA

I get down to the root cause and close it with an action whose effectiveness can be measured. I do not stop at the symptom, because symptoms always come back — usually at a worse moment and under a different name.

When it makes sense to get in touch

  • The same defect returns despite closed corrective actions.

  • A customer rejected your 8D report and expects deeper analysis.

  • Reports name “human error” as the root cause and the analysis stops there.

  • CAPA actions are recorded, but nobody checked whether they worked.

  • The team knows the methods, yet under time pressure jumps straight to the solution anyway.

Scope of work

Analysis

  • Gathering facts: documentation, process parameters, samples, case history
  • Root cause analysis using 5 Why, Ishikawa and A3
  • Separating the cause of occurrence from the cause of non-detection — two different gaps
  • Testing the hypothesis against data before it becomes a conclusion

8D report

  • Leading a cross-functional team through the full 8D cycle
  • Immediate containment actions and their confirmation with the customer
  • Writing the report in a form the customer will accept without another round of questions
  • Closure: verifying effectiveness and transferring the findings

CAPA

  • Corrective and preventive actions with an owner, a deadline and an effectiveness criterion
  • Post-implementation effectiveness review based on data, not on a declaration
  • Updating the standard and the FMEA so the finding stays in the process
  • Rolling the solution out to other lines and sites carrying the same risk

What you are left with

  • A closed analysis with a root cause backed by evidence, not by a hypothesis

  • An 8D report in a form the customer will accept

  • CAPA actions with assigned ownership and an effectiveness criterion

  • An updated standard and documentation, so the finding does not leave with the team's memory

How we work together

  1. Understanding the problem and its context

    Talking to the team and management, mapping the constraints: people, systems, deadlines and budget.

  2. Analysing the data and the current process

    Mapping how the process actually runs, not how the procedure describes it.

  3. Setting priorities and a plan

    What gives the largest effect for the smallest cost, in what order, and who owns what.

  4. Delivering the solution

    Working with users, piloting, training, correcting based on what practice shows.

  5. Measuring effectiveness and stabilising

    Checking whether the change actually worked, then locking it into the standard.

Frequently asked questions

Do you run the analyses yourself or train the team?

Both, usually in that order. I run the first analyses together with the team on a real case of yours — that teaches more than a workshop built on a textbook example. The team then runs the next ones and I review them. The goal is for you to stop needing me for standard cases.

Why is “human error” not a root cause?

Because you cannot build an action on it. If a person could make that mistake and the mistake made it downstream, the questions are: why did the process allow it, and why did the control not catch it. Answers to those two can be turned into a process change. “Be more careful” cannot.

A customer rejected our 8D report. Can that be turned around?

Usually yes. Reports come back for three main reasons: the root cause stops at the symptom, the non-detection analysis is missing, or the actions have no effectiveness criterion. Those are fixable inside the analysis itself — it is not a matter of describing the same thing more elegantly.

Which methods do you use?

5 Why, Ishikawa, A3, 8D, FMEA and SPC. The choice depends on the problem: a recurring process defect, a one-off incident and a design problem call for different tools. The method serves the analysis, not the other way round.

Tell me what you are working on

Describe what is happening in the process and what you have already tried. I reply within one business day.