Lab Equipment & Scientific Instrument Manufacturing worked example

Field Service Spare Kit with service kits to build of 25 kits: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop service kits to build to 25 kits, then walk the calculation through step by step. Calculate the total cost of assembling field service spare part kits for deployed instruments. Covers component costs (sensors, boards, tubing, seals, lamps), packaging, labeling, inventory holding, and logistics overhead. Helps service managers budget kit programs and set service contract pricing.

The inputs for this scenario

  • Service kits to build: 25 kits (the input this scenario stresses; the baseline uses 50)
  • Variable component cost per kit: 350 $ / kit (held at the documented default)
  • Fixed program cost: 2,000 $ (held at the documented default)
  • Kit assembly and verification labor: 500 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total kit program cost = (kits x variable cost per kit) + fixed program cost + assembly labor.
  • Total kit program cost works out to 11,250 $ at these inputs, and this is the headline figure for the scenario.
  • Cost per service kit works out to 450 $ / piece at these inputs.
  • Variable component cost works out to 8,750 $ at these inputs.
  • Fixed program and labor cost works out to 2,500 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where service kits to build sits at 50 kits and the headline result is 20,000 $, this scenario comes in 43.75% below the baseline at 11,250 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to service kits to build, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats fixed program cost and labor as one-time totals spread over the planned kits; if you build fewer kits than planned, per-kit cost rises because that overhead doesn't shrink.

Results at a glance

  • Total kit program cost: 11,250 $ (headline result)
  • Cost per service kit: 450 $ / piece
  • Variable component cost: 8,750 $
  • Fixed program and labor cost: 2,500 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Field Service Spare Kit calculator, set service kits to build to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.