Landing a New FMCG Account: Capacity Check for a Box Plant

Don't quote a big FMCG account off the corrugator's nameplate. What you can actually ship is speed × usable deckle × uptime × yield, and in our worked example that comes to roughly a third of the brochure number. There, a 3-lakh-box-a-month shipper order fits comfortably if the corrugator runs 60% of scheduled hours, and fails if it runs 50%. And the printer-slotter, not the corrugator, often turns out to be the machine that limits you.

By the Mama Editorial Team. This page is for the owner of a mid-size Indian corrugated plant, say a 5-ply automatic line in Palwal, Bhiwandi or Ahmedabad, who has an FMCG purchase manager asking, "Can you do three lakh boxes a month from next quarter?" The figures below are a template for your own numbers; assumptions are labelled.

Key takeaways

• The brochure speed is not your speed. An FCBM faculty member told PrintWeek India that most installed automatic lines in India run "somewhere in between 80 to 150-m/min", below their peak. Use your own logged average, not the design figure.
• Capacity is a product of four numbers: running speed × usable deckle (after trim) × uptime × good-board yield. Get any one of them wrong and the whole answer is wrong.
• Uptime decides most of the answer. In the example below, dropping from 55% to 50% uptime turns "fits" into "short".
• Check the next machine too. One Indian fully computerised flexo printer-slotter is listed at a maximum of 100 sheets/min and an "economic speed" of 50. With one blank per box, converting a 3-lakh order can take about four times the hours the corrugator needs.
• Think in square metres, then tonnes. Dharmendra Kumar Pandya, the same FCBM faculty member, argues square-metre costing beats kg-based costing. Capacity works the same way.

Why the nameplate number misleads

Pandya calls FMCG "the emerging segment that will drive the corrugated box industry", and plenty of plants are chasing it: PrintWeek India, reporting FCBM's 2024 annual meeting, counted more than 600 automated plants and about 7,000 semi-automatic ones. That competition is how plants end up committing to volume they have not checked.

The usual mistake is to multiply brochure speed by deckle by hours in the month. A typical Indian 1,800 mm 5-ply line is listed at 150 m/min design speed. That's 270 m² of board a minute, which sounds like you could supply anyone. But board only gets made while the line is running at speed, across the part of the web you actually sell, and only when it comes off flat and well bonded.

The four numbers, and how to get yours in a week

1. Running speed (m/min). This is your average speed while running, not the peak. Paper quality caps it: Pandya says high speeds "can be achieved only when the kraft paper quality is good". To measure it, take metres run from the cut-off counter and divide by minutes actually running, per shift, for a week.

2. Usable deckle (trim). Trim is the edge strip the slitter throws away because your blanks don't fill the web. It's pure arithmetic: trim % = (deckle − total slit widths) ÷ deckle. A 550 mm blank run 3-up uses 1,650 mm of an 1,800 mm deckle, which is 8.3% trim. The same blank run 2-up throws away 39%. Don't confuse it with the 5–6% "trim and slot" waste that Alok Kumar Gupta described to PrintWeek India for the conversion stage. Corrugator edge trim is a separate loss, and you reduce it by combining orders on the web, not by having operators work harder. Our wastage breakdown covers the other bands.

3. Uptime. This is the share of scheduled hours the corrugator is actually producing board: not heating up, not on a reel splice, not on an order or flute change, not stopped for a jam or for a shortage of paper or gum. It's the "availability" part of OEE, and the number owners know least: the shift book records output, not the minutes in between.

4. Good-board yield. These are start-up sheets, warp and delamination rejects. Gupta puts the paper-to-board stage at around 2.5–5%, and "less than 3%" with good paper, machine and operator.

To turn square metres into tonnes of paper, use the flute take-up factor. FEFCO gives B-flute 1.30–1.35 and C-flute 1.40–1.45. In other words, each square metre of C-flute board uses about 1.43 m² of fluting paper.

The worked example: a 3-lakh-box FMCG shipper

Every input below is an assumption for illustration. Put your own logged numbers in.

Step 1: what the account needs. 3,00,000 × 0.792 m² = 2,37,600 m² of good board a month. That's about 186 tonnes of board at 781 gsm. Allowing for trim and yield, you will run about 209 tonnes of paper through the line. Market-research firm Expert Market Research estimates India kraft at USD 0.44/kg for Q1 2026, about ₹39/kg at an assumed ₹88 to the dollar. Use your mill's actual quote, but at that price it is roughly ₹81 lakh of paper a month you will be buying for this one customer.

Step 2: corrugator hours. Good board per running minute = 100 m/min × 1.65 m × 0.97 ≈ 160 m². So the account needs 2,37,600 ÷ 160 ÷ 60 ≈ 24.7 running hours a month.

Step 3: does it fit? Running hours available = 416 × uptime.

The brochure calculation (150 m/min × 1.8 m × 416 h) gives 67 lakh m². The realistic figure at 55% uptime, with this box's trim and yield, is about 22 lakh m², roughly a third of the nameplate. The account is only 3.5% of the nameplate, which is why it looks easy on paper. Against the hours you actually have, it takes about 40% of your headroom at 60% uptime, about 64% at 55%, and more than all of it at 50%.

In volume terms, one point of uptime on this line is 4.16 running hours a month. That's about 40,000 m² of good board, or around 50,000 more of these boxes a month from the same machine, crew and shed. That's why the cost of an hour of downtime is worth working out for your own line.

What if you are short? The usual fix is overtime. Under Section 27 of the OSH Code, in force from 21 November 2025, overtime needs the worker's consent and is paid at twice the rate of wages, within the limits set by the appropriate (usually state) government. Assume an 8-person corrugator crew paid Haryana's basic semi-skilled minimum of ₹645.41 a day (₹16,780.74 a month; Labour Department notification No. 2/25/26-2 Lab of 9 April 2026, in force from 1 April 2026, CPI-linked). Then 13.4 scheduled overtime hours (6.7 running hours ÷ 50% uptime) cost about ₹17,000 a month in wages, before power. That's cheap. The real cost is a late delivery to a buyer who can switch suppliers, and overtime eating the buffer you keep for breakdowns and seasonal surges. If the shortfall is structural rather than a few hours, compare a second corrugator against more uptime.

Then check the printer-slotter, because it often limits you first

The corrugator makes board in square metres, but conversion goes one sheet at a time. Suppose the blank is printed and slotted on a fully computerised flexo printer-slotter listed at a maximum of 100 sheets/min, with an "economic speed" of 50 pieces/min. At the maximum, 3 lakh blanks take 50 running hours. At the economic speed they take 100 running hours, and at an assumed 50% uptime (an assumption; plate changes, ink washes and feeder jams pull it down) you need about 200 scheduled hours. That's nearly half the month's 416 hours, for one customer. At the same 50% uptime the corrugator needs about 49 scheduled hours (24.7 running hours) for this account, so the printer-slotter needs roughly four times as long. With two printer-slotters you can split the load, but they still have to fit around your existing customers.

So a plant that "has corrugator capacity" can still fail an FMCG account in the printing and finishing hall. The early warning is usually WIP: boards stacking up between the corrugator and conversion. Every artwork, SKU or colour change is also a make-ready on the printer-slotter, eating its uptime the way flute changes eat the corrugator's. Make-ready in packaging plants covers what those changes typically cost.

Questions to settle before you sign

• Is the volume flat or lumpy? Ask for the buyer's call-off pattern. A monthly average that arrives as two big weekly releases needs peak-week capacity, not average capacity.
• How many print variants and SKUs? Each one is another printer-slotter make-ready.
• Does the blank nest with your existing orders? Can it share the web with current jobs on the same flute and grade, or will it run alone at a bad trim?
• What is your measured uptime, by shift? If you don't have a week of logged running minutes per machine, you're quoting on a guess.
• Who buys the paper, and on what terms? About ₹81 lakh a month of kraft for one account is a working-capital decision as well as a capacity one. Our conversion-cost-per-kg guide shows how lost machine time raises your cost on every kilogram.

What cameras can and cannot tell you here

Be clear about the limits. A general floor camera cannot read your corrugator's speed in m/min; the cut-off counter or PLC does that. It cannot measure trim width in millimetres, board moisture, warp, bonding or box compression strength. It also cannot tell you what the buyer will actually order next quarter.

What it can show is the time picture, the input you're most likely guessing: when the corrugator was actually running and when it was stopped, how long each splice, order change or jam lasted, when the printer-slotter stood idle waiting for board or plates, and where finished board is waiting between stages. It does this per machine, not per person. Crew activity is only ever counted in aggregate, and under DPDP your workers should get a clear CCTV notice before any camera goes up.

Where Mama fits

Mama reads your existing cameras, or ones we add, and every morning sends the owner a short WhatsApp note on where hours leaked yesterday: which machines stood still, for how long, and where boards and blanks piled up. It watches machines and material flow, not individuals. That gives you a measured uptime figure for both the corrugator and the printer-slotter before you put a number on a quote. Send us a short phone video of your floor and we'll send back a camera plan and where we'd expect the hours are going.

FAQ

How do I calculate corrugator capacity in square metres? Running speed (m/min) × used deckle width (m) × 60 × scheduled hours × uptime × good-board yield. Use logged speed and measured uptime, and the used deckle for this box layout, not the full machine width.

What uptime should an Indian corrugator achieve? There's no reliable published benchmark for Indian corrugators, so measure your own over at least a week, by shift. The worked example shows why it matters: on that line, each point of uptime is worth roughly 50,000 shipper boxes a month.

Is the corrugator or the printer-slotter usually the bottleneck? For high-count printed FMCG shippers it's often the printer-slotter or finishing, which work sheet by sheet. Run the check on every stage; the machine with the fewest spare hours sets your capacity.

How do I reduce trim waste on a new account? Combine orders with the same flute and board grade across the deckle so the slit widths fill the web, or ask the buyer whether a small dimension change would let the blank run one more up. Trim is geometry and planning, not operator effort.

Should I take the account if the numbers are tight? Only if you know which lever closes the gap: measured uptime gains, better order combining, a planned overtime window, or an extra shift on the printer-slotter. Otherwise the gap shows up later as late deliveries.