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Spaghetti Diagram Distance Calculator (Walking Waste and Layout Savings)

A spaghetti diagram shows where people and material travel, and the distance numbers make the waste visible. Enter the measured path length before and after a layout change, and this calculator converts it into annual kilometers, walking hours and the labor value released.

Your numbers

Walking distance per cycle (current)

Trace the path on a layout and sum the segments.

Walking distance per cycle (proposed)

Cycles per shift

cycles

Shifts per day

Working days per year

days

Walking speed

m/s

Typical factory walking pace is about 1.0 to 1.4 m/s.

Loaded labor cost

$/hr

Your results

Hours saved per year

472 hrs

Labor value of time saved per year

$13,222

Annual walking distance (current)

3,720

Kilometers walked per year for this task.

Annual walking distance (proposed)

1,680

Walking hours per year (current)

861 hrs

Distance reduction

54.8%

Time saved only becomes cost savings if the freed capacity is used for value-adding work or overtime is avoided. Treat the labor value as capacity released.

Save results:

Hours saved per year vs proposed distance

Sweeps Walking distance per cycle (proposed) from 0 to 62, holding your other inputs fixed.

Find the busiest material moves in your ERP

Optional: we can analyze inventory transactions to show the highest-volume moves to target.

Optional. The tool and every export work without this. No spam.

How to use the calculator

Draw the path of one operator or one part on a to-scale layout for a defined number of cycles, using a different color for each route. Measure the length of the lines with a ruler, a wheel or a floor plan scale. Enter the distance per cycle for the current and proposed layout, the number of cycles per shift, shifts per day and days per year. The tool returns annual walking distance, hours and the labor value. The chart shows how the saving grows as the proposed path shortens.

Observe for a full representative period, not only the best hour
Include trips for tools, gauges, paperwork and material
Measure the proposed layout on the same drawing scale
Keep walking speed realistic: 1.2 m/s is a reasonable default

The formula

Annual distance equals distance per cycle times cycles per shift times shifts per day times working days per year. Walking time is distance divided by speed, and labor value is the hours multiplied by the loaded hourly cost. The calculation is simple on purpose; its strength lies in showing a large number that people can picture. In the sample, cutting a 62 meter path to 28 meters saves roughly 1,400 hours per year for a two-shift cell, which is close to one full-time person.

Using the result

The result supports a layout case, for example moving a deburr bench next to a CNC cell or putting a gauge at point of use. Combine it with a standard work combination sheet to show the effect on operator cycle time. Be honest about what the saving is: time is released, and the plant must decide whether to use it for more output, other tasks or reduced overtime. Present both the distance and the hours to the team who walks the route.

Common mistakes

Measuring one cycle and extrapolating without checking variation, forgetting the return trip, ignoring forklift or tugger paths in the same area, and claiming 100 percent of the freed time as cash savings are the usual errors. Remember also that moving equipment has costs and safety implications, so include those in the business case.

Frequently Asked Questions

What is a spaghetti diagram?

It is a drawing of the actual movement paths of people, material or information on a floor layout. The tangled lines show unnecessary travel and help design a more direct flow.

How accurate is a typical walking speed?

Factory walking speeds vary with load, floor conditions and traffic, usually between 1.0 and 1.4 meters per second. Measure on your floor if the result drives a large investment.

Does saved walking time equal saved money?

Not automatically. It is released capacity. You convert it to savings only if you reduce overtime, avoid hiring or use the time for work that adds value.

How many cycles should I observe?

Observe enough cycles to see variation, often 10 to 20 for a short cycle task. For infrequent trips, use logs or a time-sample over a full shift.

If you want to find the trips that matter in the first place, we can help analyze transaction and move data from your ERP to find the busiest flows.

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