Value Stream Mapping Tool

VSM Calculator
Map. Measure. Improve.

Based on "Learning to See" by Rother & Shook. Calculate takt time, flow efficiency, kanban quantities, and production lead time — and surface the waste hiding in your value stream.

Takt

Time Calculation

Available time ÷ customer demand

VA%

Flow Efficiency

Value-added vs total lead time

Kanban Quantity

Pull system sizing formula

PLT

Production Lead Time

Door-to-door time analysis

Tool Capabilities

Every calculation from current to future state

The VSM Calculator covers the full analytical toolkit a lean practitioner needs to design a high-performing value stream.

Takt Time & Demand Analysis

Calculate the rate at which you must produce to match customer demand. Account for shift patterns, planned downtime, and OEE losses.

Process Capacity & Bottleneck ID

Compare each process step's cycle time against takt time. Instantly identify your capacity-constraining bottleneck and quantify the gap.

Days of Supply & WIP Analysis

Calculate inventory days-of-supply at each queue point. See exactly how much of your total lead time is consumed by waiting, not working.

Kanban Quantity Calculator

Size your pull system correctly. Calculate kanban card quantities accounting for replenishment lead time, safety stock, and demand variability.

Value-Added Ratio Formulas Guide Future State Design PDF Reports Multiple Scenarios

How It Works

From current state data to future state design

Enter your process parameters

Input cycle times, uptime %, shift patterns, and customer demand for each step in your value stream.

Calculate current state metrics

The tool automatically derives takt time, production lead time, value-added ratio, and kanban quantities.

Identify improvement opportunities

See which steps are over takt, where WIP is excessive, and what your theoretical minimum lead time could be.

Export your analysis

Download a formatted report to support your VSM workshop, A3, or project charter.

VSM CalculatorMap. Measure. Improve.