By: Acyr Borges - Chief Executive Officer at ProSys Fill LLC

Manufacturers today are under pressure to achieve two goals that have traditionally been difficult to combine: very high production speeds and rapid, flexible changeovers. They want higher throughput, shorter production runs, faster product transitions, less downtime, lower scrap, and the ability to adapt quickly to changing packaging and customer demands.

For years, filling systems were evaluated primarily on speed. How many containers per minute can the line run? What is the maximum throughput? Those questions still matter. But maximum speed alone does not necessarily produce maximum real-world productivity, especially in operations involving frequent changeovers, high product mix, and difficult high-viscosity products. In many operations, filling systems are essentially profit engines; every minute they are not running represents lost production opportunity.

The Hidden Conflict Between Speed and Flexibility

Manufacturers are often pursuing two goals at the same time: maximum throughput and minimum changeover time.

The same engineering choices that support very high-speed production can also make systems harder to clean, maintain, and change over quickly. At higher speeds, fillers, conveyors, cappers, labelers, and container-handling equipment must work in tighter coordination. Small disruptions that might be manageable at lower speeds can create jams, instability, crashes, or downtime during changeovers and startup.

That becomes especially true with thick, sticky, viscous products. Traditionally, manufacturers often felt they had to choose between running at the highest possible production rates or adapting quickly to product changes, container changes, and shorter production runs.

Today, however, creative approaches are making it possible to achieve far more of both. By looking at the entire production line as a complete system, manufacturers can maintain high productivity while improving flexibility and reducing downtime.

Two Different Types of Changeovers

In practice, manufacturers are often managing two very different types of changeovers: product changeovers and container changeovers.

Product changeovers may involve cleaning, formulation adjustments, viscosity challenges, color changes, or ingredient transitions. The challenge is not simply switching from one product to another. It is removing or recovering material from the product path, preventing cross-contamination, adjusting fill behavior, and getting the next product running consistently with as little startup scrap as possible.

With high-viscosity materials, that becomes especially difficult. Thick products may cling to hoses, nozzles, pumps, and other wetted parts. They may require more time to purge, clean, or stabilize. If the product is expensive, every pound left in the system becomes part of the changeover cost.

Container changeovers create a different set of problems. A new bottle, cartridge, tube, cap, label, or package material may require mechanical adjustments throughout the line, not only at the filler, but also at conveyors, guides, cappers, labelers, accumulation tables, and downstream packaging equipment.

Even small container differences can matter at higher speeds. Two packages may look nearly identical, but subtle differences in height, diameter, rigidity, cap geometry, or orientation can affect handling, timing, stability, and discharge. A container changeover is therefore not just a format change. It is a line-coordination challenge.

Each type of changeover requires its own strategy. Product changeovers emphasize cleanability, product recovery, viscosity management, and formulation control. Container changeovers emphasize mechanical setup, repeatability, operator guidance, and synchronization across the line.

That is why the best filling solutions are not designed around a generic idea of “fast changeover.” They are designed around the specific changeover problems the manufacturer actually faces.

Why High-Viscosity Products Complicate Everything

High-viscosity products create a different set of challenges for filling operations. Thick creams, gels, pastes, adhesives, syrups, and similar materials do not behave like water-thin liquids. They resist flow differently, cling to surfaces, create buildup, and become harder to clean, recover, and move consistently through a filling system.

The very properties that make these products valuable can also make them difficult to fill efficiently at high speeds.

Creams are designed to stick to skin. Caulks and sealants are designed to adhere to building materials. Greases are designed to cling to moving metal components. Those same performance characteristics can create major challenges inside a filling system.

At high production speeds, product buildup, startup instability, inconsistent flow behavior, and cleaning complexity can all increase the likelihood of jams, crashes, wasted product, or extended downtime.

Reducing Waste, Not Just Downtime

Many high-viscosity products are also high-value products, making waste reduction critically important.

The Toyota Production System helped redefine how manufacturers think about waste, not only downtime and inefficiency, but also unnecessary material loss during production and changeovers. That philosophy has enormous implications for filling operations involving frequent product transitions, formulation changes, or color changes.

In many traditional systems, significant amounts of product must be purged, discarded, or cleaned out during changeovers. The larger and more complex the product pathways, the greater that waste becomes.

Manufacturers that approach filling systems strategically can reduce waste dramatically. At ProSys Fill, for example, one customer application previously scrapped roughly 800 pounds of material during product transitions because of product trapped in long piping runs between processing and filling. By shifting to the company’s CMX inline, on-demand mixing approach, scrap was reduced to less than 8 pounds.

Reducing waste is not only about saving product. It also helps reduce cleanup time, minimize crashes, improve operational stability, and return the line to production more quickly.
A line that runs slightly slower but produces dramatically less waste, fewer crashes, and less downtime may ultimately deliver greater operational value.

Quick Changeovers Are About More Than Time

When manufacturers discuss quick changeovers, they often focus on elapsed time. Can the line change over in 30 minutes instead of 60? Can setup occur in under 10 minutes?
In lean manufacturing, the SMED, “Single-Minute Exchange of Die,” philosophy targets changeovers measured in single-digit minutes rather than hours.

Those questions matter, but time alone is not the whole story. The most effective changeover strategies also minimize operator errors, startup instability, incorrect recipes, crashes and collisions, troubleshooting delays, fill inconsistencies, and startup scrap.

In many facilities, the largest productivity losses occur immediately after the official changeover has supposedly been completed. Operators may still be fine-tuning settings. Containers may jam. Fill levels may drift. Incorrect parameters may be loaded. Product may be wasted while systems stabilize.

Reducing changeover time without reducing the likelihood of startup crashes only solves part of the problem. The true goal is minimizing total operational disruption.

Thinking Beyond the Machine

One of the biggest mistakes manufacturers make is viewing changeovers primarily as a machine-selection problem.

Quick and reliable changeovers are the result of an entire operational strategy: business planning, product mix analysis, packaging considerations, operator workflows, automation strategy, upstream and downstream integration, documentation, recipe management, error prevention, and maintenance planning.

Manufacturers need to think in terms of complete filling solutions rather than standalone pieces of equipment.

Start With the Business Model

The correct filling solution depends heavily on the production environment.

Is the operation focused on long, high-volume production runs? Or is it a high-mix environment involving frequent product and container changes?

Will packaging remain stable, or are sustainability initiatives likely to introduce thinner materials, lighter containers, and more format variation?

Those questions shape engineering decisions from the beginning. The business model drives the solution.

Understanding the Entire Process

An effective filling solution requires understanding the entire production flow, both upstream and downstream.

Upstream considerations may include viscosity variation, product temperature, flow consistency, pumping characteristics, and ensuring the filling line receives sufficient average and instantaneous product flow rates.

Downstream considerations may include capping, labeling, accumulation, case packing, palletizing, line synchronization, and even something as seemingly minor as how a cartridge is oriented when discharged toward a case packer.

In high-speed filling operations, the devil is often in the details. A filling machine cannot be optimized in isolation from the rest of the line. Problems upstream or downstream can create bottlenecks, instability, downtime, or crashes that undermine the entire operation.

Preparation Is Often the Key

The concept is similar to the “mise en place” approach used in professional kitchens: tools and ingredients are organized and ready before the work begins. In filling operations, the same principle applies when parts, tools, and procedures are staged in advance of the actual changeover.

Rather than waiting until production stops to begin cleaning and preparation activities, manufacturers can reduce downtime by preparing components in advance. One common strategy involves maintaining a second set of wetted parts.

While one set remains in production, another set can be cleaned, sanitized, inspected, and prepared for the next run. When the changeover occurs, operators swap components instead of waiting for cleaning procedures during active downtime.

That approach can reduce line stoppage while improving consistency, simplifying workflows, reducing operator stress, and minimizing startup mistakes.

Modular Systems Can Simplify Changeovers

Equipment architecture itself can also reduce changeover complexity, downtime, and waste. In many traditional filling operations, changing colors, formulations, or product characteristics may require stopping production, emptying large portions of the system, cleaning extensive product pathways, and disposing of significant amounts of material.

That process can be expensive, time-consuming, and wasteful, especially with high-viscosity products.

More modular approaches can reduce those disruptions significantly. One example is the CMX platform from ProSys Fill, which maintains a larger volume of base product while selectively incorporating smaller amounts of additives, pigments, catalysts, or other formulation components closer to the point of filling. That approach can dramatically reduce the amount of product that must be purged, cleaned, or discarded during formulation changes.

In caulk and sealant applications, manufacturers may be able to switch colors with far less disruption and waste because only relatively small additive volumes need to be changed rather than replacing large quantities of base material throughout the system.

The same concept can support rapid formulation adjustments. By changing additive combinations, manufacturers may produce formulations with different curing times or performance characteristics without completely reconfiguring the overall filling operation.

Sometimes Two Smaller Systems Are Better Than One Large One

Manufacturers often assume that larger systems automatically produce greater efficiency. But two smaller systems may outperform one large system even when total theoretical throughput is identical.

For example, two 50-container-per-minute systems may provide greater operational flexibility than one 100-container-per-minute line. Production can continue on one system while changeovers, cleaning, or maintenance occur on the other.

That creates important advantages: scheduling flexibility, redundancy, reduced risk, and less total downtime. A failure on one large line can stop production entirely. Multiple smaller systems may provide resilience that improves overall uptime and productivity.

Again, the optimal solution depends on the application, product mix, production schedule, and long-term operational strategy.

Human Factors Matter

Even highly automated filling systems still depend on operators to perform changeovers, load recipes, verify settings, and troubleshoot problems, which makes usability a critical part of overall performance.

Modern filling solutions increasingly incorporate guided workflows, intuitive HMIs, recipe management, visual verification systems, clear documentation, laminated visual setup guides, and poka-yoke error-proofing strategies that make incorrect assembly difficult or impossible.

That becomes especially important during changeovers, when operators may be working quickly and dealing with subtle differences between containers that appear “about the same” but create major problems at high speeds if settings are not adjusted properly.

The Real Goal Is Productive Uptime

Filling operations are increasingly being evaluated on overall productivity, not simply line speed.

The goal is not simply maximizing line speed or minimizing changeover minutes. It is maximizing productive uptime across the operational life of the system.

That requires balancing multiple priorities simultaneously: throughput, flexibility, cleanability, operator usability, waste reduction, packaging adaptability, maintainability, and future scalability.

No single machine specification can accomplish all of that alone.

It requires a strategic, systems-level approach that considers the entire production environment from business model and product mix to operator workflows and future packaging evolution. Manufacturers that approach filling systems holistically are better positioned not only to improve productivity today, but also to adapt as production demands continue to evolve.

For that reason, flexibility should not be treated as an isolated feature or buzzword. It is the outcome of aligning equipment, controls, operators, and processes around the specific portfolio of SKUs, packaging formats, and changeover patterns the business actually runs.

Flexible filling systems are designed and engineered to adapt to a variety of container types and fill volumes swiftly and effortlessly. They shine in handling a broad range of products with varying viscosities, not just meeting current production demands but also prepared to tackle future needs. This forward-looking strategy goes beyond immediate plans, ensuring the investment is future-ready and resilient, rather than tied to a single “ideal” product or package.
PLCs must support hundreds of SKUs or more, with an HMI that simplifies recipe creation and recall. Operating an HMI for servo-driven systems involves a straightforward push-button process, streamlining changeovers compared to traditional pneumatic cylinders and cams that necessitate manual adjustment.

The ultimate in flexibility is efficiently supporting multiple SKUs without requiring changeovers. For instance, the ProSys Custom Mix (CMX) System enables continuous operation of long packaging runs with varying product formulations without interrupting the packaging process, allowing on-the-fly variation of flavor or color and other product characteristics.

The custom mix system enables manufacturing to produce a base product in large volumes and then process smaller volumes of final products by blending in up to 12 different additives (including pigments, catalysts, flavors, and viscous slurries/suspensions) into the base product.

In the end, the goal is not speed for its own sake. It is productive uptime: more good product out the door, less waste during transitions, and fewer disruptions across the line.

Manufacturers that take a holistic view of filling operations are better positioned to improve performance today while preparing for future changes in products, packaging, and production demands.

That is where the strongest long-term value is created, not in a single headline speed metric, but in a system designed to keep production moving reliably, efficiently, and with greater control.