Lean Manufacturing Calculators
A free suite of lean and industrial-engineering calculators — takt, OEE, cycle time, flow and more. Instant results, no sign-up. The same formulas built into Yamazo Studio's Lean Operating Desk.
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Takt Time Calculator
Takt = Net available time / Customer demandOEE Calculator
OEE = Availability × Performance × QualityCycle Time Calculator
Saving = (Current − Target) × Volume × Work days × RateLittle's Law Calculator
WIP = Throughput × Lead time (L = λ × W)Process Cycle Efficiency (PCE) Calculator
PCE = Value-add time / Total lead time × 100Pitch Calculator
Pitch = Takt × Pack sizeKanban Calculator
N = ⌈ (D × LT × (1 + α)) / C ⌉SMED Savings Calculator
Saving = (Current − Target) × Changeovers/day × Work daysLine Balance Efficiency Calculator
Efficiency = Total work content / (Stations × Cycle time)Rolled Throughput Yield (RTY) Calculator
RTY = FPY1 × FPY2 × … × FPYnDPMO Calculator
DPMO = (Defects / (Units × Opportunities)) × 1,000,000Sigma Level Calculator
σ = NORMSINV(1 − DPMO/1,000,000) + 1.5Process Capability Calculator (Cp / Cpk)
Cp = (USL − LSL) / 6σ · Cpk = min(Cpu, Cpl)EOQ Calculator
EOQ = √( (2 × D × S) / H )Safety Stock & Reorder Point Calculator
SS = Z × σ_d × √LT · ROP = demand × LT + SSStandard Work Calculator
Operators = ⌈ total manual time / takt ⌉Heijunka Calculator
Units/variant = demand / variants · pitch = taktThroughput Calculator
Throughput = units produced / time periodPareto Analysis Calculator
Sort desc → share % → cumulative % → vital few ≤ 80%5S Audit Calculator
Score = Σ pillars / 25 → %Kaizen ROI Calculator
ROI = (savings + one-time − cost) / cost × 100MTBF & MTTR Calculator
MTBF = uptime / failures · MTTR = downtime / failuresMore than calculators
Single-point calculators are the start. See how the whole lean workflow fits into one offline desk.
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