Implantable Electronics & Neurodevices worked example

Production Ramp Readiness at 59% ramp cell uptime: a worked example in implantable electronics & neurodevices

This worked example runs the production ramp readiness numbers for a tougher week than the baseline: 59% ramp cell uptime instead of the typical 82%. Estimate good device output available during an implantable electronics production ramp from cell output, planned cycles, uptime, and first-pass yield.

The inputs for this scenario

  • Implantable devices completed per ramp cycle: 18 devices / cycle (held at the documented default)
  • Planned ramp cycles in the build window: 80 cycles (held at the documented default)
  • Ramp cell uptime: 59 % (the input this scenario stresses; the baseline uses 82)
  • Ramp first-pass yield: 92 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross ramp output = devices completed per ramp cycle × planned ramp cycles.
  • Good ramp-ready output works out to 782 devices at these inputs, and this is the headline figure for the scenario.
  • Gross ramp output works out to 1,440 devices at these inputs.
  • Ramp downtime loss works out to 590 devices at these inputs.
  • Ramp yield loss works out to 67.97 devices at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where ramp cell uptime sits at 82% and the headline result is 1,086 devices, this scenario comes in 28.05% below the baseline at 782 devices.
  • Use it during scale-up planning for a new implant or neurodevice line to set committable output and to target whichever loss bucket is largest. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Good ramp-ready output: 782 devices (headline result)
  • Gross ramp output: 1,440 devices
  • Ramp downtime loss: 590 devices
  • Ramp yield loss: 67.97 devices

Run it with your numbers

  • To rerun this with your own numbers, open the live Production Ramp Readiness calculator, set ramp cell uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.