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Traceability after a complaint

Traceability is more than data storage. When a complaint lands, teams have to see quickly which process conditions mattered.

S. Okafor

SIX SIGMA MBB
26 MAR 2026 · 2 MIN READ
how we work

When a complaint lands, time counts. Not only because customers expect an answer, but because every hour of uncertainty generates internal holds, extra inspections, escalations and management attention.

Many companies have the data. But they don't have it in a form that leads quickly to a decision.

Traceability isn't an archive

Traceability is often understood as proof: which lot, which material, which equipment, which inspection step?

That matters. But when it counts, it isn't enough. The team also has to understand which process conditions were relevant, whether other lots could be affected, and which hypotheses are plausible.

An archive answers: what was connected?

Good operational traceability answers: which of that is decision-relevant?

The familiar search work

After a complaint, teams start pulling data together: MES, ERP, historian, lab, inspection reports, shift notes, maintenance data, material lots. Often a manual timeline takes shape in Excel.

That work is slow and error-prone. More importantly, it ties up exactly the people who should also be leading the root-cause work.

What AI can deliver here

AI can help prioritise relevant time windows, parameters, comparison lots and patterns faster. It can surface anomalies that easily get lost in a manual search.

But it shouldn't replace the decision. In regulated and quality-critical environments, the responsibility stays with qualified people. Jidokai therefore has to be framed as decision support: faster, more structured, more traceable.

The lean question: what happens next?

Once the cause is plausible, the real improvement begins. Does a standard change? Is change control needed? Does a process window have to be adjusted? Which teams get trained? Which early warning prevents a repeat?

Traceability without learning is just better management of the past.

The takeaway

When a complaint lands, it isn't only about finding data. It's about turning data quickly into a clean decision and a robust countermeasure.

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WRITTEN BY
S. Okafor
SIX SIGMA MBB

A practitioner perspective from the Lean Competence network, published under a pen name (see our editorial note). Practitioners are available for sprints, fractional and interim engagements.