Rail Signaling & Wayside Equipment worked example

Wayside Enclosure Cost at 99% first-pass yield: a worked example

This scenario runs the wayside enclosure cost calculation on the strong side: 99% first-pass yield, with every other input held at its documented default. you are quoting or budgeting a batch of wayside signal cabinets and need a defensible per-enclosure cost.

The inputs for this scenario

  • Wayside enclosures built: 40 units (unchanged)
  • Material and fit-out cost per enclosure: 5,200 $ / unit (unchanged)
  • First-pass yield: 99 % (raised for this scenario; the documented default is 94)
  • Tooling and type-test setup: 8,500 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Wayside enclosure cost = wayside enclosures built x material and fit-out cost per enclosure x first-pass yield + tooling and type-test setup) to the inputs above produces each figure below.
  • At this operating point the engine returns 214,420 $ for total wayside enclosure cost, the number this scenario is built around.
  • At this operating point the engine returns 5,361 $ / piece for wayside enclosure cost per unit.
  • At this operating point the engine returns 205,920 $ for variable wayside enclosure cost.
  • At this operating point the engine returns 8,500 $ for fixed wayside enclosure cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where first-pass yield sits at 94% and the headline result is 204,020 $, this scenario comes in 5.1% above the baseline at 214,420 $.
  • Use it when quoting a wayside signaling enclosure batch, comparing suppliers, or deciding whether a design change justifies a new type-test setup cost. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total wayside enclosure cost: 214,420 $ (headline result)
  • Wayside enclosure cost per unit: 5,361 $ / piece
  • Variable wayside enclosure cost: 205,920 $
  • Fixed wayside enclosure cost adder: 8,500 $

Run it with your numbers

  • Every input above is editable in the live Wayside Enclosure Cost calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.