The Two Standards That Determine Whether Your Line Runs Well
Most FMCG lines have standards documented somewhere. A laminated sheet on the machine, a folder in the maintenance office, a spreadsheet someone built three years ago. The question isn't whether standards exist — it's whether they're the right ones, clearly defined, and actually being used.
Two standard types sit at the heart of a functioning autonomous maintenance program: CILs and Centrelines. Used together, they cover the full picture of equipment condition. Used poorly — or not at all — they leave the line vulnerable to exactly the kind of slow deterioration that turns into unplanned downtime.
What a CIL is — and why it matters
CIL stands for Clean, Inspect, Lubricate. Its role is straightforward: keep equipment in a healthy physical state and identify defects before they become failures.
The three components aren't separate activities. They're a single discipline. Cleaning is inspection in disguise — you can't thoroughly clean a machine without running your hands across its surfaces, noticing wear, spotting contamination, catching a fitting that's working loose. Lubrication done properly requires the operator to assess the condition of the point before applying — is there residue? Is the fitting intact? Is there unusual wear around it?
When a CIL is working, operators aren't just maintaining the machine — they're the earliest warning system for emerging defects. A photoelectric sensor with a contaminated lens, flagged during a morning round, is a frequent line stop that never raises its head. A conveyor roller with a collapsing bearing, caught by an operator rotating it by hand during a CIL inspection, is a maintenance job planned and executed before it cascades into something bigger.
That's the real value of a CIL: not that it keeps things clean, but that it keeps the machine in a known, healthy state — and surfaces the deviations that would otherwise stay hidden until they cause a problem.
What a Centreline is — and why it matters
A Centreline is a parameter-based standard. Where a CIL asks "is the machine in good physical condition?", a Centreline asks "is the machine set correctly for what it's running right now?"
Its role is to ensure the machine is set up to the best known standard for the SKU being produced — confirming at shift start, after changeover, or after any intervention that every parameter is where it needs to be.
Centreline parameters include process values — pressure, temperature, speed. They also include physical machine settings: position indicators with a numerical readout that tells you exactly where a setting is wound to. A Centreline captures what that number should be for each format, so an operator can confirm the machine is where it needs to be — not just approximately right.
A line producing 425mL bottles has a different set of Centreline values than the same line running 600mL — guide positions, fill targets, torque settings, label placement. Verifying those values at shift start is what prevents a format changeover from quietly running outside standard for hours, producing waste or quality failures that trace back to a setting that was never confirmed.
When a Centreline is working, the machine isn't set by memory or feel. It's set to a documented standard that reflects the best known conditions for that product — and every deviation from that standard is visible.
Why the two together cover the full picture
CILs and Centrelines address different failure modes.
A machine can be perfectly set to its Centreline values and still fail — if a lubrication point is neglected, a sensor lens is contaminated, or a roller bearing is collapsing. Conversely, a machine in excellent physical condition will still produce defects if it's running on incorrect settings after a format changeover.
CIL catches physical deterioration. Centreline catches process drift and setup error. Together they cover the two root causes behind the majority of equipment-related losses on an FMCG line.
How standards fail over time
Even well-written standards degrade. Format changes introduce new Centreline values that never get documented. A lubrication point gets moved during a rebuild and nobody updates the CIL. An experienced operator retires and the reasoning behind a standard goes with them.
New operators follow the what without the why, and are poorly equipped to notice when something is genuinely wrong. The standard looks complete. It just no longer reflects the line.
The only defence is a structured process for proposing and approving changes — so the operators who notice when a standard is wrong have a path to update it.
How Continual manages both
In Continual, CILs and Centrelines are defined as distinct check types in the app, each structured to match what the standard actually requires. Centreline checks prompt operators to enter or verify a value against the defined target and acceptable range, flagging a deviation automatically if the reading falls outside it. CIL checks guide operators through each inspection and lubrication point with clear descriptions and optional photo evidence.
Both are format-aware. When a line changes format, Centreline targets update automatically to reflect the new running conditions. Operators are always verifying against the right values for what's on the line right now.
Every check in Continual maintains a full version history — who changed it, what changed, and when. The Proposed Changes workflow gives operators a direct path to flag when a standard is wrong or outdated, and once approved, the new version is logged automatically. The standard improves over time — and there's always a clear record of how it got there.
See how Continual manages CILs and Centrelines on your line. Start your free trial.