RUIYI

Automotive & Auto Parts

Lean production & quality

Automotive supply does not have one production problem. It has a changeover problem, a traceability problem and a schedule problem, and they argue with each other all day: every extra variant the customer asks for adds another changeover, every changeover pushes the schedule, and every schedule push creates pressure that shows up as quality problems.

We work mostly in tier-one and tier-two suppliers, where the customer sends a drawing and expects the same part at the same quality for years. That means a process that was settled years ago has to keep producing to a standard it was never designed for.

The improvements that pay in this industry are rarely glamorous. They are separating the change from the run, binding the process to the batch, and finding the defect at the station instead of at the end of the line.

Changeover disciplineBatch-bound processDefect found at the stationCustomer audit ready

What we know. This industry runs on long agreements, short notice and unforgiving audit requirements. A process that cannot show what it did last Tuesday is a process that cannot take a new customer. What we do not do. We do not replace the line, and we do not ask you to change your tooling. We work with the equipment and the people you already have.

What actually goes wrong in automotive supply

Five things, in the order they usually surface.

Changeover eats the scheduleSetup is done while the line is already down, so every variant costs production time it was not planned to cost.
A part comes back and nobody can reconstruct itThe batch exists, but the process settings, the material and the shift are not joined to it.
Defects are found at the endBy the time assembly or the customer finds it, the whole batch has to be sorted, and the cause was visible earlier.
Customer-specific requirements live in someone's memoryA drawing revision or a process change reaches the floor verbally and the record lags behind.
Process parameters are not tied to the batchThe machine ran what it ran; if a setting changed, nothing shows which parts it affected.
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The line does not need to be faster. It needs to change less expensively.

Most plants we walk through already have capable equipment. What they lack is the separation between the work that must happen while stopped and the work that can happen while running.

How we solve it

Three moves, in this order. The order matters: separating the change is what makes it possible to measure it, and measuring it is what makes binding the batch worth doing.

One line, many variantsA production line shown twice. In the upper row, three variants run one after another and every changeover interrupts the line. In the lower row the same three variants run, but the changeover work is separated from the run and prepared ahead, so the line keeps moving. The point of the diagram is that the difference is not the equipment, it is how the change is organised.Before: the change is part of the runVariant Achangeoverline stoppedVariant Bchangeoverline stoppedVariant CAfter: the change is prepared, then executedVariant AVariant BVariant Cchange executed as adefined short routineNothing here is new equipmentA tier-one supplier does not lose this to a better machine. It is lost to the way the change is organised,and to knowing which build made the part that came back.

Once the changeover is defined, the second move follows naturally — every parameter that matters gets recorded against the batch, so a question about a part from six months ago can be answered. The third is structural: the station that can detect the defect becomes the station that reports it, instead of passing a suspicion down the line.

What this covers in practice

Area

What we address

What it changes for you

Changeover & scheduling

Internal and external work separated, prepared ahead, executed as a routine

The line stops for a defined short period rather than an open one

Traceability

Batch, material, shift, machine and parameters joined to the part

A returned part can be reconstructed without a week of searching

In-process quality

Checks at the station that can actually stop the part

Defects contained at the point they occur

Customer requirements

Drawing and process revisions handled as controlled changes

The floor and the customer specification stay together

Supplier collaboration

Incoming material linked to the batch that consumed it

A supplier issue is scoped rather than argued about

What we bring from this industry

Not a claim of coverage — what we have actually had to solve, and what that taught us.

Changeover work we have doneSeparating internal from external work on real lines, with the line team doing the trials
Traceability chains we have builtFrom supplier batch to despatch, including the parameter history behind each part
Station-level checks we have implementedWhere to place a check that the line will actually run, rather than one it will work around
Audit preparation we have supportedGetting a plant ready for a customer audit without freezing the line for a week
Supplier and customer specificsHow a tier-one really handles a drawing revision, and how that has to reach the station
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We have done this on working lines

Not in a pilot cell with no customers attached — on lines that still had to ship the next day. That is the only context in which this kind of work holds.

How we deliver

Stage

What we do

What you get

Assess

Watch a few changeovers and follow one batch through the process

A measured view of where the time and the risk actually sit

Pilot

Redesign and rehearse one changeover with the line team

A defined routine, rehearsed by the people who will run it

Bind

Attach parameters, material and shift to the batch

A part that can be reconstructed from its record

Hold

Add station-level checks and change control, and keep them running

Quality and specification held by the process, not by memory

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Nothing that stops the line

Every step is designed around the line continuing to ship. A process improvement that cannot survive contact with a weekly schedule will not survive.

What we solve

Each of these is something we take responsibility for solving, in this industry, on a working line.

Changeover that costs whatever it costsA defined, rehearsed routine with the preparation done ahead of the stop.
Parts nobody can reconstructBatch, material, shift and parameters joined to the part itself.
Defects found at the endCaught at the station that can stop them, with the cause visible while it is fresh.
Requirements living in someone's memoryRevisions handled as controlled changes that reach every station.
Settings nobody can account forParameters recorded against the batch, so the affected parts are known.
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Audit-ready is a by-product

Plants that can reconstruct a part do not prepare for audits. They find that they are already ready, because the process was holding the record all along.

How we work with you

  • Start with one changeover. The one that costs you most, measured on your own numbers.

  • Work with the line team. They design the routine; we make sure it survives contact with the schedule.

  • Keep the record with you. The traceability you build belongs to the plant, not to us.