The Packaging Machine Procurement Checklist: 7 Steps That Would Have Saved Me $180K

Who This Checklist Is For (And Who It Isn't)

If you're sourcing a packaging line for the first time—or replacing gear that's already limping—this is the list I wish someone had handed me in 2019. I've been handling equipment procurement for a mid-sized food manufacturer for the last six years. Most of that work touched snack foods, nuts, grains, and a seasonal candy line. Nothing glamorous. But I've made and documented four significant errors that together wasted roughly $180,000 in budget, including a rejected VFFS install, a weight-compliance failure on a multipond weigher, and a candy line that never hit its quoted speed. Now I keep an 11-page pre-purchase checklist for our team. What follows is the short version.

One caveat before we start: my experience is based on about 9 line purchases with annual volumes between 8 million and 40 million bags, running on fairly standard food-grade materials. If you're in pharma, high-acid, or ultra-low-volume segments, some of this won't translate. I'd rather flag that now than pretend the list is universal.

Step 1: Sort automatic packaging machine manufacturers by Material First, Machine Type Second

Here's the thing: most buyers start by defining the equipment category—automatic packaging machine manufacturers, multipond weigher suppliers, VFFS builders—then compare quotes inside that category. That's the wrong order.

What I mean is that the machine class is downstream of the material you're running. A free-flowing granule behaves nothing like an irregular candy. And a powder that builds static will make the same VFFS that ran beautifully in a demo look like a defective unit.

Before you send an RFQ, write down:

• Bulk density and flow characteristic of your product
• Friability (will it break in a weigher bucket?)
• Adhesion tendencies (does it stick to stainless?)
• Moisture and temperature sensitivity

Then ask every automatic packaging machine manufacturer to run your actual sample through a 60-second dry cycle. Not their demo media. Not a stock video. Yours. On a real machine. In front of you or on a live call.

If the reply is "oh, our machines handle similar products all the time," that's a red flag, not reassurance. Push for the sample run.

Step 2: Convert "bags/min" Into OEE Before You Sign Anything

Rated speed on a quote sheet is measured under conditions that won't exist on your floor. You need to convert it, and I learned that the hard way on a VFFS order in 2019.

Take the quoted 120 bags/min figure. Now subtract:

• Changeover time (format switches, film roll swaps)
• Minor stops (film misfeed, seal jaw picking)
• Weight cycle variance on the weigher side
• Downstream accumulation backpressure

The math usually lands somewhere between 45 and 65 effective bags/min. Our 2019 VFFS was quoted at 90. We measured 78 in the FAT—single format, ideal film, all day. On real production with feeder inconsistency and jaw temperature drift, we settled at 52. That single miscalculation blew up our capacity model for the whole quarter.

Look, I'm not saying quote sheets are dishonest. I'm saying they describe a condition that isn't yours.

Step 3: The multipond weigher Question Nobody Asks

When you're evaluating a multipond weigher, the specifications page will proudly state something like "accuracy ±0.8g." Ask one question that no one in the room will have an answer for: 2-sigma or absolute worst case?

These are wildly different numbers.

Our 2021 unit was specified at ±0.8g. On our product—salted peanuts—we ran three consecutive shifts and captured about 200 cycles. The 2-sigma spread was actually closer to ±1.4g, with occasional excursions past ±3g. Fill weights dipped below declared net weight on roughly 4% of bags during humidity swings. We had to issue a reprint on a label run and eat the overweight costs.

For weight compliance reference, pull the actual standard. OIML R76 covers non-automatic weighing; OIML R87 and R51 apply to prepackages and automatic catchweighers respectively. If you're in the US, NIST Handbook 133 is the enforcement reference for net content. Don't rely on the vendor datasheet as your compliance basis.

If your accuracy tolerance is defined by your regulatory exposure and not by a brochure, you'll design a different acceptance test. And you'll likely demand a longer sample run at FAT.

Step 4: Vertical form seal machine—Test the Film, Not Just the Machine

Most vertical form seal machine problems aren't machine problems. They're film problems that only show up when the film interacts with the machine's sealing profile and the ambient conditions in your plant.

You're really matching three things: film structure (PE, PET/PE, metallized, compostable), jaw geometry and pull-belt tension, and your room's humidity. Change any one and the window shifts.

Our 2019 VFFS passed FAT flawlessly with a standard PE. We plant-tested with a compostable PLA laminate, and the fin seal started channeling within the first hour. The seal-temperature window on that laminate was maybe 12°C wide—our machine's band was 40°C. We ended up $18,000 deep in a film-path retrofit plus three days of downtime.

If I could redo that decision, I'd have quoted the film spec into the RFQ and required the vendor to demonstrate the seal integrity on that exact substrate. Back then, I didn't know to ask. The machine wasn't broken. Our assumption was.

Step 5: candy packaging machine and food grain packing machine—Mail Them a Sample, Not a Spec Sheet

Success rate on remote equipment selection goes up sharply if you physically ship your product to the vendor before they quote.

Send five pounds of product, 20 meters of your actual film, and your format drawing. Ask for a sample bag on video within one week. Both candy packaging machine suppliers and food grain packing machine builders will do this for a serious buyer. If they won't, that tells you something.

We did this for a gummy line in Q2 last year. The two vendors that agreed produced wildly different bags. One had seal wrinkles that would have failed our retail audit. The other ran clean but at half the rated speed. Neither was obvious from the spec sheets.

Step 6: fill seal machine—The Changeover Clock Starts on the Floor, Not in the Catalogue

Every fill seal machine quote says something like "changeover: 15 minutes." That number usually refers to the tooling swap and nothing else.

Real changeover includes purge, weight re-verification, film path, first-bag QC, and documentation. We had a unit specified at 12 minutes. We measured 15 changeovers over six weeks: average was 34 minutes, worst case 71 (that one had a product bridging issue in the feed chute).

If you're running multiple SKUs on one line, the changeover delta is where your real capacity goes. Ask the vendor to demonstrate three consecutive changeovers in their factory and let you time them. On your product, if possible.

Step 7: FAT—Write Your Own Protocol

Do not accept the vendor's factory acceptance test protocol as delivered. It's designed to pass.

Write your own. Ours currently covers seven things, measured over a continuous 8-hour run with your material and your operator present:

1. Sustained speed (not peak)
2. Weight accuracy sampling every 500 bags
3. Seal strength on both fin and end seals
4. Film waste rate
5. Changeover time (three reps)
6. Mean time between assists
7. Restart time after each stop

If the vendor resists a custom FAT, that is itself data. Every one of our successful installs had a cooperative FAT. Every failure had a vendor who wanted to "keep it simple."

Things I Learned Too Late (Or the Hard Way)

A few scattered notes that don't fit neatly into the steps above:

• Budget 6–10% of machine cost for commissioning, training, and first-year spares. Every time we didn't, we exceeded it.
• Ask for a 90-day performance guarantee measured under your shift conditions, not in their lab.
• Specify spare parts by part number and get current pricing. Lead times on heater bands and load cells tightened post-2021 in ways that surprised us.
• Pay extra for quick-change tooling and tool-less format parts. Every dollar there pays back on changeover time.

Two limitations on my own list. First, I've never procured for a facility north of 40 million bags a year; my instinct is that at that scale you need a full-time packaging engineer on staff, and my checklist isn't a substitute for one. Second, everything I wrote assumes a regulatory environment that's relatively permissive. If your product falls under FSMA preventive controls, EU 10/2011 food contact rules, or pharma serialization, add a compliance workstream—don't just sprinkle it on top of what's here.

The checklist that actually matters is the one you maintain yourself. Mine was built from four expensive mistakes and about 9 successful installs. Yours will look different. But start one before the next PO, not after.