ROI calculator methodology
The Flexo Equipment ROI Analysis tool estimates payback months and directional savings when moving from gravure, offset, digital, or legacy flexo to a modern CI or stack platform. This guide describes each input, how payback is inferred, and scenarios that change the answer more than electricity price alone.
Input parameters explained
Current method sets the baseline cost structure. Gravure typically carries higher cylinder and changeover cost on short-to-medium runs; digital is strong on ultra-short runs but expensive at high annual m²; offset and other flexo sit between those extremes depending on your plant. The model uses method as a savings profile selector, not a full ERP cost roll-up.
Material (film, paper, nonwoven, mixed) influences waste and ink assumptions and which press families are preferred. Film-heavy plants usually map to CI gearless or CI servo platforms; paper and board mixes may favor stack or hybrid lines.
Annual production (m²) is sold or planned printed area for the line you are replacing or adding. Inflating this number shortens modeled payback—use a forecast you can defend in a board meeting.
Required speed (m/min) is the line speed needed to hit that annual volume within your hours/day and days/year envelope. If the calculator later recommends a series that cannot hold this speed on your substrate, treat payback as optimistic.
Hours per day and days per year define available production time. Sixteen hours and three hundred days is a common two-shift export default. Plants with frequent quality hold or regulatory downtime should lower these before blaming the press.
Colors drive plate, wash-up, and station complexity. Six-to-eight color film jobs with white and varnish behave differently from four-color process labels—enter the deck count you actually run most weeks.
Monthly labor (USD) and electricity (USD/kWh) are optional. When blank, the model emphasizes capacity and material/waste style savings. When filled, labor and energy deltas appear in the breakdown so you can sensitivity-test local utility and wage rates.
Calculation logic
Payback months approximate capital intensity of the recommended series against modeled annual savings. Savings buckets typically include material/waste reduction versus the selected current method, labor where provided, and energy directionality. Exact coefficients are server-side planning factors—not a financing quote.
Annual capacity in the result is the press envelope implied by your speed and calendar inputs, used to check whether the recommended machine can absorb the volume you entered. If capacity is below annual production, extend payback or plan a second line.
Press type and sub-series bias the recommendation toward CI gearless, CI servo, or Honor stack families. Changing only press type without changing speed or volume will shift the machine band more than the payback arithmetic.
This is not NPV, IRR, or tax-adjusted CapEx. Duties, installation, training, spare parts kits, and building works are outside the form. Use the output to shortlist a series, then request a factory quotation with a full commercial offer.
- Payback ≈ implied CapEx intensity ÷ modeled annual savings.
- Optional labor and kWh inputs refine—but do not replace—process savings.
- Capacity check validates that the recommended series can print your annual m².
- Always follow with a formal quote; never treat months as a contractual SLA.
Typical scenario A — gravure film plant upgrading to CI flexo
A converter printing about 5,000,000 m²/year on gravure at roughly 300 m/min often sees payback driven by plate versus cylinder cost and changeover waste more than by power. Enter gravure, film, 5e6 m², 300 m/min, sixteen hours, three hundred days, and six colors. Compare Master versus King recommendations after adjusting efficiency expectations with the capacity calculator.
Typical scenario B — digital overflow moving to flexo
When digital owns the short runs but annual m² has grown into flexo territory, set current method to digital and raise annual production to the volume you want off the digital fleet. Payback usually improves once coverage and run lengths stabilize; if your mix stays below a few hundred meters per SKU, flexo CapEx may still lose—use the tool to prove that, not to force a purchase.
Typical scenario C — stack flexo replacing aging gear-driven line
Label and board plants replacing gear-driven stack frames should select other_flexo or offset as baseline, paper or mixed materials, and realistic 150–220 m/min speeds. Labor savings appear when servo automation reduces crew per shift; leave labor blank if you will not reduce headcount and only want waste/quality driven ROI.
How to brief sales after you calculate
Send the payback months, annual m², required speed, color count, current method, and whether labor/energy were included. Ask LISHG to confirm dryer fuel or electric load, sleeve inventory impact, and installation timeline assumptions behind any CapEx band discussed.
Reconcile ROI with the capacity calculator using the same calendar. Then open the product selector with matching substrate and quality answers so the commercial discussion and the engineering shortlist stay aligned.
Savings drivers that usually dominate
On gravure-to-flexo film conversions, plate versus cylinder economics and changeover waste often dwarf electricity. If your SKU mix is short and colorful, emphasize changeover and plate cost in the sales brief even when the form’s energy field is blank.
On digital-to-flexo shifts, ink cost per m² and click-style pricing matter until run lengths grow. Re-run ROI at two annual volumes—the volume you have today and the volume you expect in 24 months—to see when flexo crosses over.
On flexo-to-flexo upgrades, quality claims (register, waste at speed) need measured baselines. Bring recent waste percentages and complaint rates; otherwise modeled waste reduction is only a hypothesis.
Labor savings require a staffing plan. If local rules prevent reducing crew, leave labor blank so payback is not propped up by headcount cuts you will not take. Automation may still win on waste and uptime without a payroll delta.
Sensitivity tests worth running
Vary required speed ±15% and annual m² ±20%. If payback flips from attractive to unacceptable inside that band, your decision is forecast-sensitive—buyers should see that explicitly.
Toggle current method between gravure and other_flexo when you operate mixed halls. The “right” baseline is the line you will actually retire or relieve, not the most flattering comparison.
Add electricity only after you have a local tariff and a vendor’s estimated kWh/kg or kWh/m² narrative. Placeholder energy prices create false precision.
What this ROI model deliberately ignores
Installation civil works, pits, exhaust ducts, and electrical rooms are excluded. Those costs vary by country code and existing hall layout more than by press series.
Working capital for sleeves, anilox, and spare parts kits can add meaningful mid-five to six figures on a multi-deck CI line. Ask for a recommended spare kit with the quote rather than stuffing a guess into payback months.
Training time, temporary dual-running of old and new lines, and scrap during ramp-up are real cash drains. Conservative buyers add three to six months of “soft payback” beyond the calculator result when presenting to ownership.
Currency, letter-of-credit fees, and import VAT/duties are commercial terms—not process physics. Keep them in the finance model beside this engineering ROI view.