Fiber Optic Cable & Photonic Interconnects worked example

Splice Loss Budget at 71% target splice-loss pass rate: a worked example

Suppose target splice-loss pass rate falls to 71%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Calculate splice-loss pass rate from splices within the allowed loss limit compared with total completed splices.

The inputs for this scenario

  • Splices within loss limit: 388 splices (held at the documented default)
  • Total measured splices: 400 splices (held at the documented default)
  • Target splice-loss pass rate: 71 % (the input this scenario stresses; the baseline uses 98)

Working through the calculation

  • The calculation starts from the formula this tool documents: Splice-loss pass rate = splices within loss limit รท total measured splices.
  • Splice-loss pass rate works out to 97 % at these inputs, and this is the headline figure for the scenario.
  • Gap to splice-loss target works out to -26 points at these inputs.
  • Splices within loss limit works out to 388 splices at these inputs.
  • Total measured splices works out to 400 splices at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where target splice-loss pass rate sits at 98% and the headline result is 97 %, this scenario lands almost exactly on the baseline at 97 %.
  • It computes the percentage of measured splices that fall within the loss limit and the points by which that pass rate trails your target. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Splice-loss pass rate: 97 % (headline result)
  • Gap to splice-loss target: -26 points
  • Splices within loss limit: 388 splices
  • Total measured splices: 400 splices

Run it with your numbers

  • To rerun this with your own numbers, open the live Splice Loss Budget calculator, set target splice-loss pass rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.