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How to Use This Calculator

Follow these 4 steps to estimate your DFMA ROI

1

Select Your Industry

Pre-fills typical values for your sector

2

Choose Investment Tier

Pilot, Growth, or Scale

3

Adjust Savings Presets

Conservative, Typical, or Aggressive

4

Review Results

See ROI, payback, and savings breakdown

Total run-rate savings $0. Year 1 ROI 0%. Payback –.
1 Start Here
Select your industry to auto-fill typical values ?Different industries have different typical volumes, costs, and project counts. Selecting your industry pre-populates realistic starting values.
Industrial Equipment: Moderate volumes (~25,000/year), unit costs (~$200), precision assemblies with strict quality requirements.
✓ Proof & Methodology

Expand below to see where the presets come from, how DFMA shifts work earlier in development, and ROI/NPV definitions.

Average DFMA cost reductions (170+ case studies)
Labor Costs Part Count Separate Fasteners Total Cost Weight Assembly Time Assembly Cost Assembly Tools Assembly Operations Product Development Cycle 0% 50% 100% 42% 54% 57% 50% 22% 60% 45% 73% 53% 45% Top ten responses from 170+ case studies
  • The bars reflect published averages from DFMA case studies. Even the "Ambitious" preset (42%) is below the published average of 50%, giving your projections a built-in margin of safety.
  • "Total cost" on the slide is 50%. This calculator breaks savings into simplification, should-cost price moves, and quality/overhead reductions for auditability.
  • "Typical" defaults (30%) represent approximately the 40th percentile of published results — most DFMA implementations exceed this level.
How DFMA shifts the development process
DFMA Design Process Conventional Design Process 0 50 100 20 13 22 5 3 27 55 15 Source. Plastics Design Forum
  • DFMA moves work out of late-stage design changes and into concept and first-pass design.
  • That shift is what drives the engineering hours saved and avoided tooling changes in the calculator.
  • The engineering defaults here are conservative versus the averages shown above.
How we calculate ROI and NPV (definitions)
  • Run-rate savings = the annual value DFMA analysis identifies across all included levers at full implementation.
  • Identified vs. Realized: DFMA analysis identifies savings opportunities quickly (weeks). Realized savings follow implementation: design changes must reach production, supplier contracts must be renegotiated, teams must adopt new practices.
  • Realization curves: Product Simplification 15% → 65% → 100% (Y1-3); Should-Costing 50% → 100% (Y1-2); Engineering Productivity 85% → 100% (Y1-2).
  • Year 1 ROI = (Realized Year 1 savings − Year 1 cost) / Year 1 cost. Note: Year 1 includes training, NRE, and only partial savings realization — negative Year 1 ROI is normal and expected.
  • Steady-state ROI (Year 3+) = (Run-rate savings − recurring cost) / recurring cost.
  • Payback = months until cumulative realized savings exceed cumulative costs.
  • 5-Year NPV = net present value of all cash flows over 5 years at the specified discount rate.
2a Lever 1 of 3

🔧 DFMA Product Simplification

Redesign products for fewer parts, simpler assembly, and lower manufacturing costs. This lever captures unit cost reductions from DFMA-driven design changes.

Investment tier:
What's included in each tier?
Pilot: Ideal for 1–2 DFMA projects/year, up to ~40 purchased parts in scope.
Growth: Best for 3–5 projects/year, ~40–120 purchased parts.
Scale: Full-scale deployment for 5+ projects/year, 120+ purchased parts and/or multi-site rollout.
Savings level: ?All presets stay below the published average of 50% total cost reduction. Even "Ambitious" (42%) has a built-in margin of safety versus documented results.
⚠ This exceeds the published case study average of 50%. Consider validating with a pilot project first.
Annual Volume
0
Simplification Savings
$0
Per Product
$0

📊 Cost Reduction Breakdown

Defaults are conservative yet realistic based on published DFMA case studies. Adjust to match your product and goals.

⭐
Part count & material savings Eliminated parts, consolidated components, cheaper materials Benchmark: 72% of product cost is parts/materials
%
A
Assembly labor savings Fewer operations, faster assembly, reduced handling
%
O
Overhead & inventory Fewer SKUs, simpler logistics, reduced carrying costs
%
Q
Quality, tooling & other Fewer defects, less tooling, reduced warranty
%
Total Cost Reduction 18.0%

Based on Boothroyd Dewhurst research: 72% of product cost is parts/materials. Published case studies average 50% total cost reduction; defaults (30% typical) use the lower end for credible, defensible projections.

🔧 Implementation Effort (NRE)

One-time engineering, change, and IT effort needed to implement DFMA redesigns.

Total NRE (one-time): $0

2b Lever 2 of 3

💰 DFMA Should-Costing

Use DFMA as a should-cost baseline to negotiate better prices on purchased parts. Scope represents your highest-spend purchased parts — the ones most likely to have pricing gaps. Typical programs target the top 15–20% of SKUs by spend, where should-cost analysis routinely uncovers 15–25% gaps between current pricing and true manufacturing cost.

Investment tier:
What's included in each tier?
Pilot: Ideal for one or two key suppliers or commodities, ~45 parts/year in scope.
Growth: Best for several suppliers or product families, just over 100 parts/year in scope.
Scale: Full-scale multi-commodity or multi-site backbone for negotiations, roughly 200+ parts/year in scope.
Savings level:
Part Volume
0
Gross Savings
$0
Per Part
$0

Should-cost analysis workload: 0.0 hours/year.

Analysis effort cost is treated as an operational cost (added to the investment side) rather than reducing gross savings. This gives a clearer picture of the true savings vs. true costs.

2c Lever 3 of 3

⚡ Engineering Productivity

DFMA shifts work earlier in development, reducing late-stage changes. Captures engineering hours saved and avoided tooling changes.

Savings level:
Engineering Savings
$0
Avoided Tooling
$0
Program Total
$0
3 Optional

Financial Assumptions

Adjust discount rate for NPV calculation and annual savings escalation (inflation).

Tip: For full definitions (Year 1 cost vs steady-state, ROI formula, NPV), see the Proof & Methodology section above.

Run-Rate Savings
$0
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