SCINFOLABS · MIXR — Costing & Margin Methodology

How every quoted price is built up: base cost, gross margin, buffers, surcharges, vendor selection and commercial discounts.

1. Base cost build-up

Element	Basis
Bought-out (motor, gearbox, seal, bearings, VFD, instruments)	Vendor list cost, chosen by best-value KPI engine (§5)
Fabricated (shaft, impeller, baffles, vessel shell/heads, flanges)	Material mass × grade €/kg (kgPrice) + shop labour
Material €/kg	304 < 316L < Duplex 2205 < Super-Duplex 2507 / 904L < Hastelloy / Ti

2. Gross margin

Selling price = cost × (1 + MARGIN), MARGIN = 0.275 (27.5%). Applied uniformly to every line item (priceOf = round(costOf × 1.33)).

3. Engineering & material buffers

Buffer	Rate	Applied to
Raw-material volatility	+5.0%	Mixer base (matContCost)
Inflation / escalation	+2.5%	Mixer base (inflCost)

4. Surcharges & option premiums

Surcharge	Value	Trigger
Corrosion-resistant upgrade	from €480	Acid / chloride / severe service
Paint & coating	+5% / +2.25% / +2% of drive	Finish class & certification
Efficiency-class premium	IE4 / IE5 uplift	Class above IE3
Sound hood	≈ +4.5% of drive	Outdoor / low-noise; × ATEX if hazardous
Factory Acceptance Test	€1,200 / 900 / 600 / 400	By drive-size band
Documentation & certs	per pack	FDA, EHEDG, 3-A, ATEX, PED, ASME, CE
PM escalation	+2.5% to +5%	Project complexity (pmCost)

5. Vendor selection — best-value engine

KPI	Weight
Quality	0.25
Price (live-FX)	0.20
Lead time	0.20
5-yr reliability	0.20
Innovation + market (0.5/0.5)	0.15

Composite = 0.25·quality + 0.20·price + 0.20·lead + 0.20·reliability + 0.15·(0.5·innovation + 0.5·market), ×100. Live ECB FX normalises vendor prices daily.

6. Commercial offer / discount

offTierPct applies a customer-tier allowance (up to ~3%) + volume allowance (~2–3% multi-unit) to the marked-up price. Commercial only — does not touch the cost base.

7. Final quoted price

Step	Formula
1 Line price	cost × 1.33
2 Sub-total	Σ line prices
3 + Buffers	+5% material +2.5% inflation
4 + Surcharges	corrosion, paint, efficiency, hood, FAT, docs, PM
5 − Offer	tier + volume
6 = Quoted price	net to customer

Live configurator constants: MARGIN 27.5%, buffers 5% / 2.5%, paint 5%/2.25%/2%, corrosion €480, FAT €1200/900/600/400, hood ≈4.5%. Tier/volume bands are commercial parameters. Methodology document — not a quotation. DISCLAIMER: all outputs are machine-generated, information only; ScInfoLabs, its owners and employees accept no responsibility or legal liability for financial, commercial or technical loss in any jurisdiction; consult a qualified expert before decisions. ScInfoLabs · MIXR.