Comparing suppliers should start with measurable production data rather than machine price. Ask each supplier to run the same product, film, pack size, and operating speed, then compare accepted packs per minute, reject rate, dosing accuracy, changeover time, power and compressed-air demand, spare-parts availability, and service response. A machine rated at 80 packs/minute but producing 68 acceptable packs/minute is less productive than one consistently delivering 74. For a line operating 4,000 hours per year, even a 5% availability difference equals 200 production hours. Compare verified output and lifetime operating cost, not brochure speed alone.
A useful comparison starts before quotations arrive. Give every supplier the same product specification, package dimensions, target weight, film structure, required speed, accuracy range, operating hours, cleaning requirements, and factory conditions. ISO 22400-1:2014 provides an industry-neutral framework for manufacturing KPIs and was reviewed and confirmed as current in 2025, so production performance can be discussed using established manufacturing measures rather than vague descriptions.
For example, a specification may require 500 g packs, 50 packs/minute, ±2 g filling tolerance, less than 1% rejects, 16 operating hours per day, and three SKU changes per shift. A supplier quoting 70 packs/minute should then show whether the machine can maintain the requested accuracy and package quality at 50 packs/minute for an extended run.
Rated speed should be treated as a starting number. Accepted packages leaving the line are more useful than empty machine cycles.
This distinction becomes important when suppliers use different definitions of output. A machine cycling at 80 packs/minute with 3% rejected packages produces about 77.6 accepted packs/minute before downtime is considered. At 90% availability, practical output falls to roughly 69.8 accepted packs/minute, or about 4,188 per operating hour.
Ask for a timed production run using the intended product and packaging material. A 10-minute demonstration can miss thermal drift, film-roll changes, product buildup, feeder interruptions, and repeated operator adjustments. A 60- or 120-minute run provides a larger operating sample; at 60 packs/minute, a two-hour test covers up to 7,200 machine cycles.
Record planned cycles, completed packages, rejects, stops, stop duration, and operator interventions. PMMI's 2026 OEE survey, based on 35 industry respondents, reported that 93.8% of respondents offering OEE solutions tracked downtime, while 45.7% offered customers an OEE-tracking solution. The figures reinforce why downtime belongs in a supplier comparison rather than being discussed only after installation.
Once stable output has been measured, inspect package quality at the same speed. For a vertical form-fill-seal application, review seal width, seal position, bag length, registration accuracy, cutting position, wrinkles, leakage, fill accuracy, and contamination in the sealing area. Sampling 20 finished bags is weak evidence when a machine will make millions annually; a 200- or 500-pack inspection gives a more useful picture.
| Item to compare | Example requirement | Test method |
|---|---|---|
| Sustained output | 60 packs/min | 120-minute production run |
| Reject rate | ≤1% | Count all rejected packs |
| Fill accuracy | ±2 g | Sample 200 packs |
| Changeover | ≤20 min | Full SKU-to-SKU change |
| Availability target | ≥95% | Agreed production period |
| Documentation | 100% supplied | Checklist before shipment |
After output and package quality, compare the hardware producing those results. Request the exact PLC, HMI, servo, inverter, sensor, pneumatic, temperature-control, bearing, and gearbox brands and model families. A quotation saying "servo motor" provides little purchasing information if replacement hardware takes 4 weeks to obtain.
Parts availability should be evaluated by location. Ask for the price and normal lead time of 10–20 likely wear or failure items, including heaters, thermocouples, belts, cutting blades, sealing components, photoelectric sensors, relays, and pneumatic seals. A low-cost component can stop a complete line if no compatible replacement is available locally.
The control system deserves the same review. Confirm whether maintenance staff receive PLC and HMI backups, electrical drawings, alarm lists, parameter records, and restoration instructions. If a failed HMI can be replaced physically in 2 hours but software recovery requires 48 hours of supplier support, the replacement time alone does not describe the maintenance requirement.
Changeover testing comes next because catalog speed does not show lost production between SKUs. Assume two machines both produce 60 packs/minute. Machine A requires 35 minutes for a format change; Machine B requires 15. With four changes per day, the difference reaches 80 minutes, equal to as many as 4,800 machine cycles before rejects and startup checks are counted.
Ask an operator—not only the supplier's senior engineer—to perform a complete format change during acceptance testing. Record the time from the last acceptable pack of SKU A to the first acceptable pack of SKU B. Include forming-set replacement, film loading, recipe selection, sensor adjustment, filling calibration, and quality approval. A claimed 10-minute changeover that excludes 15 minutes of calibration is not a 10-minute production change.
Packaging-material compatibility should then be tested across the expected operating range. Different film thicknesses, friction levels, sealant layers, registration marks, and recyclable mono-material structures can change feeding and sealing behavior. If the plant expects to reduce film thickness by 10% within two years, include a thinner sample during testing rather than assuming current settings will transfer.
Material testing also affects running cost. A line producing 20 million packs per year with a 1.5% film-waste rate wastes material for 300,000 packs. Reducing waste to 0.8% cuts that figure to 160,000 packs, a difference of 140,000 package equivalents before material price is applied.
Utility data belongs beside material consumption. Request measured electrical load and compressed-air consumption at the agreed production speed, not only installed motor power. The U.S. Department of Energy has reported that compressed-air leaks can waste 20–30% of compressor output in poorly maintained systems, while a well-maintained system can keep leakage below 10%. Pneumatic demand therefore deserves attention when comparing line operating costs.
A buyer reviewing an automatic packaging machine supplier should also separate the main machine price from the installed-line price. A $95,000 quotation may exclude the feeder, conveyor, coder, checkweigher interface, guarding extension, commissioning travel, spare tooling, freight, and operator training, while a $112,000 quotation may include several of those items.
Use the same cost boundary for every offer:
-
Machine and format tooling
-
Feeding and discharge equipment
-
Inspection and coding interfaces
-
Installation and commissioning
-
Operator and maintenance training
-
Recommended 2-year spare-parts package
-
Freight and applicable site work
-
Estimated energy and compressed-air use
-
Planned maintenance and consumables
A five-year comparison often changes the apparent price difference. If Machine A costs $100,000 and Machine B costs $120,000, the initial gap is $20,000. If A requires $9,000 more each year in maintenance, additional labor, material loss, and downtime, the five-year difference reaches $45,000 beyond its purchase price advantage, assuming comparable production volume.
Service terms should therefore be expressed in hours and days. "Fast support" cannot be compared. A written commitment such as remote response within 4 business hours, stocked standard parts dispatched within 24 hours, and an on-site technician available within 72 hours gives purchasing and maintenance teams something measurable.
Ask suppliers for three reference installations using similar products, speeds, and package formats, preferably machines operating for at least 12 months. A supplier with 15 years of business history may still have limited experience with a particular powder, frozen product, liquid viscosity, bag style, or washdown environment. Application similarity is more informative than company age by itself.
Factory Acceptance Testing should convert the quotation into measurable acceptance conditions. A practical FAT might require a 120-minute continuous run at 60 packs/minute, no safety-related faults, less than 1% package rejects, agreed weight tolerance across a 200-pack sample, one complete SKU change within 20 minutes, and successful testing of alarms and emergency stops.
Write acceptance numbers into the purchase specification before the machine is built. Terms such as "high accuracy," "stable running," and "easy changeover" cannot be measured consistently.
Safety and regulatory documentation should be checked before shipment as well. For machinery placed on the EU market, Regulation (EU) 2023/1230 covers machinery design, technical documentation, conformity procedures, instructions, and declarations; the regulation applies from 20 January 2027, with some provisions applying earlier. It also requires digital instructions to remain accessible for the expected machine lifetime and for at least 10 years after market placement.
For food, cosmetics, or pharmaceutical packaging, the same EU regulation includes additional hygiene-related requirements covering product-contact materials, cleanability, and contamination prevention. Buyers should therefore inspect contact surfaces, access for cleaning, retained-product areas, removable parts, and documentation instead of treating stainless-steel construction alone as proof of hygienic suitability.
Documentation can be scored during FAT rather than requested months later. Check electrical and pneumatic drawings, operating manuals, maintenance schedules, spare-parts lists, software backups, alarm descriptions, certificates, and component manuals. Require 100% of agreed documents before final acceptance if documentation is part of the purchase contract.
Training should also have a defined scope. A 4-hour operator session is different from two days covering production, cleaning, format changes, preventive maintenance, electrical fault finding, servo alarms, sensor replacement, and software restoration. Record who receives training and whether the supplier provides reusable materials for future employees.
The final comparison can place all verified information in one table without assigning importance based only on purchase price. Keep claimed data separate from witnessed data; for example, mark a 70 packs/minute brochure figure differently from 64 packs/minute demonstrated during a 120-minute FAT.
| Comparison field | Supplier A | Supplier B | Supplier C |
|---|---|---|---|
| Verified accepted output | 58/min | 64/min | 61/min |
| Reject rate | 1.8% | 0.7% | 1.1% |
| Full changeover | 28 min | 16 min | 21 min |
| Remote response | 8 hr | 4 hr | 6 hr |
| Standard parts dispatch | 48 hr | 24 hr | 48 hr |
| 5-year estimated cost | $248,000 | $231,000 | $239,000 |
Before issuing the purchase order, repeat the calculation using the factory's annual operating hours. At 4,000 hours per year, a 3% availability difference represents 120 hours annually. At 60 accepted packs/minute, those 120 hours correspond to as many as 432,000 packages of production capacity, making a small percentage difference large enough to outweigh a modest equipment-price gap.