Appliance Electronics & Control Boards worked example

SMT Line Throughput Calculator at 99% smt line uptime: a worked example

Push smt line uptime up to 99% and the picture changes. This example computes every intermediate figure at that operating point. a PCB assembly or production manager needs to confirm whether SMT capacity can support appliance board demand

The inputs for this scenario

  • Control boards per SMT panel cycle: 6 boards/cycle (unchanged)
  • Available SMT panel cycles: 520 cycles/shift (unchanged)
  • SMT line uptime: 99 % (raised for this scenario; the documented default is 88)
  • First-pass SMT assembly yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross panelized board capacity = control boards per SMT panel cycle × available SMT panel cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 2,996 boards/shift for usable smt board throughput, the number this scenario is built around.
  • At this operating point the engine returns 3,120 boards/shift for gross panelized board capacity.
  • At this operating point the engine returns 31.2 boards/shift for boards lost to smt downtime.
  • At this operating point the engine returns 92.66 boards/shift for boards lost to smt defects.

How this compares with the baseline

  • Against the tool's baseline example, where smt line uptime sits at 88% and the headline result is 2,663 boards/shift, this scenario comes in 12.5% above the baseline at 2,996 boards/shift.
  • It computes good boards per shift by multiplying boards per panel cycle by available cycles, then derating for line uptime and first-pass assembly yield. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • Usable SMT board throughput: 2,996 boards/shift (headline result)
  • Gross panelized board capacity: 3,120 boards/shift
  • Boards lost to SMT downtime: 31.2 boards/shift
  • Boards lost to SMT defects: 92.66 boards/shift

Run it with your numbers

  • Every input above is editable in the live SMT Line Throughput Calculator calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.