医薬品生産における段取り時間とは? 効率的に減らす方法

医薬品製造において, changeover time refers to the downtime when a production line stops to switch from one product (or batch) to another. 例えば, a tablet line changing from Product A to Product B may require cleaning, die/tool changes, and calibration before production can resume. 定義上, changeover time is “the total time elapsed between the production of the last good product of the previous run and the first good product of the following run.”. Every minute spent on changeover is lost production time (and thus lost profit). 実際には, packaging lines may do 5–15 changeovers per shift, so saving even a few minutes each time can save thousands of production-minutes per year.

Changeovers typically include four phases: shutdown, cleanup, 設定, そして startup. Shutdown stops the line, cleanup removes residue (汚染を防ぐために), setup installs the new format (ツール, guides, レシピ), and startup tunes the line until quality specs are met. 製薬業界で, strict cleaning and validation make changeovers especially lengthy. On average, roughly 20–30% of time in a pharma facility can be spent on changeover activities. 言い換えると, nearly a third of the day can vanish to cleaning and setup, especially in multi-product plants where “the whole day may be spent on a major cleanup of the production line”.

なぜそれが重要なのか: Long changeovers hurt production efficiency and costs. Each additional minute of downtime reduces Overall Equipment Effectiveness (OEE) and throughput. 例えば, a study found that a factory doing 10 changeovers a day wastes about 8,000 minutes annually if each change takes just 3–5 extra minutes. That’s hundreds of hours (and thousands of dollars) lost each year. By cutting changeover time, a plant gains more value-added run-time. It also permits smaller batch sizes and more flexible scheduling – critical benefits when pharmaceutical demand shifts quickly. 要するに, reducing changeover time means more production per shift, less idle labor, and better responsiveness to market needs.

Challenges Unique to Pharma Changeovers

Pharmaceutical production faces special hurdles. Unlike many consumer industries, drugs demand the highest quality and purity standards. Before switching products, thorough cleaning and validation are mandatory to avoid cross-contamination. This can involve multi-step 定置洗浄 (CIP) cycles that take 30–60 minutes (or more for very viscous or potent products). After cleaning, quality systems often require proofs that equipment is sterile and free of the previous drug. All this regulatory overhead naturally extends downtime.

さらに, pharma lines often run a wide variety of products – different molecules, 製剤, そして 包装形式. Switching between tablets of different sizes, or from tablets to capsules, can mean physically swapping dies, molds or feeders on machines. Each adjustment adds minutes. ある情報源のメモとして, “In general, facilities that produce a wide variety of products will likely have longer changeover times… as switching between products involves adjusting settings and replacing tooling.”. In fast-moving consumer goods, lines may run only one product per day. 製薬業界で, a line might switch products multiple times in a week, or even per shift, magnifying changeover impact.

ついに, operator skill and coordination matter. Inconsistent methods across shifts can make identical product swaps take wildly different times. Without standard procedures and well-trained crews, one team might do a changeover in 15 minutes while another takes 30, introducing further inefficiency.

Lean Tools: SMED and Best Practices

A proven way to tackle changeover time is the SMED (Single-Minute Exchange of Dies) methodology from Lean manufacturing. SMED’s goal is to cut changeover times to single digits (分) by moving as many tasks as possible outside of downtime. 実際に, this means preparing and staging work in advance, standardizing steps, and streamlining the actual swap. 例えば, SMED principles include:

• Preparation in Advance: Gather all format parts, ツール, と材料 前に stopping the line. Use color-coded or customized trolleys for each product format so change parts (guides, カビ, インサート) are ready at the machine. This prevents wasteful searching for tools during the stop.
• Externalize Tasks: Convert internal tasks (those that require machine stoppage) into external tasks that can be done while running. 例えば, move unused parts away or rehearse procedures beforehand.
• Quick-Release Fixtures: Employ clamps, pins or levers that allow tool-free, fast adjustments. Many modern blister or capsule machines use “quick release” clamps for guides and parts, so operators can undo and set up in seconds, not minutes.
• モジュラー設計: Use modular components that can be swapped as units. Instead of fine-tuning a single setting each time, technicians can remove one module and insert another pre-set for the next format. This is like having a “cartridge” for each product that’s pre-adjusted offline.
• Parallel Teams (Pit-Stop Approach): Just like a racecar pit crew, have multiple people do separate tasks simultaneously. 例えば, while one operator cleans the feeder, another adjusts the tooling and another aligns sensors. With coordinated teams, total changeover time drops dramatically.
• Standardized Work: Document the fastest, most efficient changeover procedures, then train every operator to use the same checklist and order of steps. Inconsistent techniques add variability. One case study notes that lack of standardization can cause 30–40% variation in changeover time between operators. Standard methods (possibly aided by electronic work instructions with photos or videos) ensure each shift performs it the best way every time.

By rigorously applying these Lean/SMED tactics, many facilities have slashed their changeovers from hours to minutes. 例えば, JinLu’s pharmaceutical packaging line redesign (using quick-release parts and synchronized teams) achieved “close-to-zero” changeover time on its machines. Shoplogix reports that best-in-class packagers average ~17 minutes per changeover versus 50 minutes for laggards – a gap that Lean methods can help close.

Practical Tips to Reduce Changeover in Packaging Lines

Based on industry experience, here are concrete tips that procurement engineers and line operators can implement:

• Pre-Stage and Organize: 前述したように, have all new-product items (部品, 死ぬ, ラベル) at the point of use before shutdown. Keep tools organized with shadow boards. Color-code similar parts so operators grab the right component quickly. Use mobile carts specific to each product for instant deployment.
• Digital Instructions and Checklists: Use tablets or screens at the machine to display step-by-step changeover guides. Digital work instructions (with images/videos) prevent flipping through binders and eliminate “I wonder if I missed a step.” They also let you update procedures quickly when improvements are found.
• Automate Where Possible: Whenever the budget allows, invest in machines with automated changeover features. Some high-end packaging lines can store “recipes” in PLCs, moving stops and calibrations at the push of a button. 例えば, servo-driven color-changing conveyors or robotic grippers can shift format changes electronically, cutting manual adjustment time. (Even using modular recipe controls lets a single operator click on the next product instead of manually cranking each handwheel.)
• Training and Teamwork: Engage all shifts in changeover improvement. Track who is fastest and ask them to train others. Hold short workshops so operators can practice on dummy setups. Reward faster changeovers to encourage participation. 覚えて: well-drilled teams can perform simultaneous tasks without interfering, like a synchronized pit crew.
• Prepare Tools and Jigs: Use dedicated fixtures or jigs that remove the need for fine adjustments. 例えば, designing guides with built-in scales or stops ensures consistent positioning. Lin e guides with numeric indicators (like in Figure 2) let an operator dial in a known setting in seconds. Ensure that the most commonly changed parts (例えば. folder panels on a cartoner, retorts on a blister machine) are tool-less or on quick-lock mechanisms.
• Clean Smart: While thorough cleaning is non-negotiable, think how to do it faster. Use CIP cycles where safe instead of manual wipes. もし可能なら, run a pre-rinse while parts are removed (例えば. spraying tubs before opening). Have cleaning carts and validated wash procedures ready. In counting/bottling lines, design the hopper and chute for tool-free removal and spraying. Some pill counters on the market even highlight their “tool-free changeover” and easy-clean parts to minimize downtime.
• Color-Coded and Labeled Parts: Tag or color-code parts by product format so there’s no confusion which hopper, nozzle, or plate belongs to which product. This small step cuts errors (wrong part installs waste time) and makes grabbing the right component instant.
• Plan Batches and Schedule Strategically: Even sequencing products wisely can help. Group similar products together (same capsule size, same blister dimensions, 等) so changeovers require fewer changes. SCW.ai suggests “increasing the number of minor changeovers” – meaning make smaller batches and switch more often to train crews, rather than one huge batch followed by a long changeover. This counterintuitive tactic often reduces the per-changeover ダウンタイム, because the team becomes accustomed to the routine.
• Measure and Standardize: Keep a log of changeover times and look for bottlenecks. If one step (like calibrating a sensor or cleaning a particular nook) consistently takes too long, focus on that. Set internal targets (even if industry norms don’t exist) and monitor performance. Standardizing components across products – for example using the same cassette for multiple blister formats – also pays off by eliminating parts swaps.
• Iterate Continuously: After each changeover improvement, note what worked and what didn’t. Apply the lean principle of Kaizen: 継続的な, incremental improvements. Over weeks and months, these small gains compound into a much shorter changeover.

まとめて, these tactics transform changeovers from dreaded slowdowns into quick, almost-routine events. 例えば, one semi-solid manufacturer slashed its changeover time from 56 minutes down to 10 分 (の 82% reduction) by switching from heavy steel containers (which required cleaning) to single-use fluid bags that eliminate cleaning entirely. While that’s an extreme case, it highlights the idea: if cleaning is your biggest hurdle, find ways to eliminate or simplify it. Even in traditional equipment, every minute you save – whether through quick-releases, parallel work, or prep – is added production time.

Packaging Machines Built for Quick Changeovers

モダンな 医薬品包装機 increasingly incorporate features to reduce changeover time. 例えば:

• ブリスター包装機: 平板 (indexed) blister machines are often more flexible than high-speed rotary types when it comes to format changes. They use step-by-step indexing and simple molds, so swapping the cavity plate and lid tooling between pack sizes is straightforward. Some models (like Jinlu’s DPH series) use quick-release clamps on infeed guides and modular tooling, allowing an operator to swap format parts in minutes.
• カプセル充填機: The best capsule fillers offer “easy changeover” Many use interchangeable mold plates or star wheels. 例えば, some machines allow you to lift out the dosing turret and drop in a pre-set one for a new capsule size. A guide on capsule fillers notes: “Some machines require a kit change to switch sizes, while others use interchangeable plates or molds… ‘easy changeover systems’ let you switch capsule sizes quickly, reducing downtime.”*. Look for fillers with quick-release cams and minimal fasteners, so that changing capsule size is a matter of hand-tightening a few knobs instead of using screwdrivers.
• 数える & 瓶詰めライン: Automated counters and fillers can also feature fast changeovers. Many tablet counters use tool-free hoppers and funnels – the dosing plates and chutes simply drop out without bolts. Newer designs employ vision systems with automatic calibration, or multiple output lanes with individual sensors, so an operator can switch product lanes instead of re-calibrating the entire system. In bottling lines, quick-disconnect hoses and modular starwheels allow faster size changes. 装備品を選ぶときは, prioritize those advertised as “fast format change” or “quick release feeding systems.”
• Cartoners and Case Packers: These often use servo drives and recipe memory. With servo-driven format stations, an operator can save settings for each carton size; on changeover, the machine moves guides and inserts automatically. In a paper by Balluff (cited by Shoplogix), guided format changeover systems cut setup time by ~65%. Machines that allow side panels to open wide and provide easy access will also reduce the time it takes to place new tooling.

In every case, when you are evaluating 包装機械 (be it blister, カプセル, bottling or cartoning equipment), ask about changeover features. Machine spec sheets often list “format changeover time” or “quick release design” if they have it. Vendors will typically say that one of the “key advantages” of their design is shorter downtime between batches. Integrating these machine-level features with good process practices (as listed above) yields the greatest overall reduction.

Beyond Changeover: Long-Term Benefits

Reducing changeover time is more than just cutting downtime – it ripples through the whole operation. Shorter changeovers directly increase throughput: more of the scheduled run is spent making product. It also improves quality and consistency: well-documented, frequent changeovers help maintain cleanliness and calibration, lowering the chance of defects due to rushed cleaning or forgotten steps. Smaller batches, enabled by quick changeovers, mean less excess inventory and fresher product, which are important in pharma for expiration and traceability reasons.

実際には, data-driven approaches to changeover can uncover hidden gains. による timing each phase (shutdown, クリーニング, 設定, startup) and comparing against targets, teams can see exactly where time is being lost. Many facilities have found that just setting a target (例えば, a 30-minute total changeover) and tracking real times motivates lean improvements. As the saying goes, “If you can’t measure it, you can’t improve it.”

ついに, fast changeovers make a plant more customer-responsive. If demand for a particular medicine spikes or a recall forces a rapid line switch, a plant with streamlined changeovers can adapt in hours instead of days. This agility can be a competitive advantage, allowing smaller lot sizes, custom products, and better use of expensive equipment. In the long run, investing effort to cut changeover time is repaid by higher OEE, lower costs per unit, and happier customers.

結論

要約すれば, changeover time in pharma manufacturing is a critical downtime that every packaging operation must manage. By understanding the steps involved and the factors that make pharma changeovers long (strict cleaning, frequent format changes, regulatory checks), manufacturers can target improvements. Adopting Lean/SMED strategies – preparing parts ahead, standardizing procedures, using quick-release and modular designs, training operators, and leveraging automation – can dramatically shrink changeover durations. Modern blister packaging machines, capsule fillers and counting lines often come with quick-change features built-in; choosing the right equipment and using it smartly is part of the solution.

Whether you’re a production manager, packaging engineer, or procurement specialist at a pharmaceutical company, focusing on changeover time can pay big dividends. Cutting just a few minutes off each format swap adds hours of extra run time every week. And as industry insiders have shown, in best-case scenarios changeovers that once took hours can be reduced to mere minutes. By implementing the tips above, your operations can move closer to that goal – keeping lines running smoothly, products flowing, and costs down.

FAQs On Changeover Time in Pharmaceutical Production

参考文献：
1.The contribution of lean manufacturing tools to changeover time decrease in the pharmaceutical industry. A SMED project – サイエンスダイレクト.
2.A Changeover Time Reduction through an integration of lean practices: A case study from pharmaceutical sector – リサーチゲート.
3.Time reduction and productivity raise’s SMED implementation: Case of a pharma´s enterprise – ieccmexicoreview.com.
4.Optimization of setup operations through the application of SMED techniques. The Zambon S.p.A. case – thesis.unipd.it.