Implantable Electronics & Neurodevices worked example

Production Ramp Readiness at 94% ramp cell uptime: a worked example in implantable electronics & neurodevices

What does the result look like when ramp cell uptime reaches 94%? The full calculation is worked below with real intermediate numbers. Use it when launch teams need to check whether a ramp plan can produce enough qualified neurodevices or implantable electronics in the next build window.

The inputs for this scenario

  • Implantable devices completed per ramp cycle: 18 devices / cycle (unchanged)
  • Planned ramp cycles in the build window: 80 cycles (unchanged)
  • Ramp cell uptime: 94 % (raised for this scenario; the documented default is 82)
  • Ramp first-pass yield: 92 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross ramp output = devices completed per ramp cycle × planned ramp cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,245 devices for good ramp-ready output, the number this scenario is built around.
  • At this operating point the engine returns 1,440 devices for gross ramp output.
  • At this operating point the engine returns 86.4 devices for ramp downtime loss.
  • At this operating point the engine returns 108 devices for ramp yield loss.

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 14.63% above the baseline at 1,245 devices.
  • A figure at this level is achievable when ramp cell uptime is genuinely sustained, not just peaked for a shift. It uses a single average uptime and a single first-pass yield; early-ramp lines are unstable, so a one-number model can overstate steady-state performance if learning-curve effects and rework recovery are not considered.

Results at a glance

  • Good ramp-ready output: 1,245 devices (headline result)
  • Gross ramp output: 1,440 devices
  • Ramp downtime loss: 86.4 devices
  • Ramp yield loss: 108 devices

Run it with your numbers

  • Every input above is editable in the live Production Ramp Readiness calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.