GRO / KNOWLEDGE
Stabilising production lines: why analyses alone are rarely enough
Material queues, settings vary between shifts, analyses have no effect: how equipment, routines and people together stabilise a production line.
The machine is running, yet material is queuing. The early shift’s settings differ from the late shift’s. An analysis exists, but little changes in daily work. Many manufacturers know this situation. Knowing that something is wrong is rarely the problem. More often, the link is missing between the analysis, the technical work and the team that runs the line every day.
Typical signs of an unstable line
- Bottlenecks shift from day to day without a clear cause.
- Settings are chosen based on individual experience and differ between shifts.
- Small faults are fixed again each time instead of being eliminated once.
- Scrap and rework fluctuate more than output itself.
- Improvement projects end with a report but without changed routines.
Why analyses alone are rarely enough
A good analysis describes the situation. A line only becomes stable when three levels come together:
- Equipment: The equipment must be in good condition. Wear, badly adjusted mechanics or missing maintenance cannot be compensated for by organisation.
- Routines: Changeovers, settings, material supply and handovers between shifts need clear, shared standards.
- People: The people on the line often know the problems best. When they are involved, solutions emerge that hold up in daily work.
If one of these levels is missing, the line soon returns to its old state.
A practical route to a stable line
- Observe on site. Bottlenecks, waiting times and faults are recorded at the line, not only derived from key figures.
- Prioritise causes. Do not tackle everything at once; start where the effect is greatest.
- Trial changes. Technical adjustments and new routines are tested and measured in agreement with the plant.
- Embed routines. What works becomes the standard: with clear settings, short instructions and responsibilities. Principles from TPM and Lean help, without becoming an end in themselves.
- Hand over. The result is a state that your own team can maintain without outside help.
Frequently asked questions
Does production have to stop for the stabilisation?
That cannot be said in general. Some work is possible during production, other work requires a stoppage. The organisation of the work and any stoppages are agreed with the plant in advance, in line with technical and safety requirements.
How long does it take until a line runs stably?
That depends on the starting point, the scope and what is possible in the plant. The duration is agreed individually.
Do we need a large project team for this?
No. More important than size is that production, maintenance and quality are involved and decisions are made promptly.
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