IIoT, SCADA & Edge Connectivity worked example

SCADA Upgrade Cost at 86% share of legacy tags migrated: a worked example

This scenario runs the scada upgrade cost calculation on the strong side: 86% share of legacy tags migrated, with every other input held at its documented default. Use it when you are scoping a SCADA modernization (for example moving from a legacy SCADA to Ignition, AVEVA, or FactoryTalk View) and need a defensible per-site cost before the integrator quote.

The inputs for this scenario

  • Number of HMI servers or runtime seats: 4 seats (unchanged)
  • Cost per HMI server or runtime seat: 18,000 $ / seat (unchanged)
  • Share of legacy tags migrated: 86 % (raised for this scenario; the documented default is 75)
  • Fixed engineering, FAT, SAT, and cutover cost: 95,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Variable SCADA platform cost = HMI server count × cost per seat × share of tags migrated) to the inputs above produces each figure below.
  • At this operating point the engine returns 156,920 $ for total scada upgrade cost, the number this scenario is built around.
  • At this operating point the engine returns 39,230 $ / piece for scada cost per hmi server or seat.
  • At this operating point the engine returns 61,920 $ for variable scada platform cost.
  • At this operating point the engine returns 95,000 $ for fixed engineering and cutover cost.

How this compares with the baseline

  • Against the tool's baseline example, where share of legacy tags migrated sits at 75% and the headline result is 149,000 $, this scenario comes in 5.32% above the baseline at 156,920 $.
  • Use it during early capital planning or vendor down-selection, before you have a binding integrator quote, to set a defensible budget and a per-seat benchmark. 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 SCADA upgrade cost: 156,920 $ (headline result)
  • SCADA cost per HMI server or seat: 39,230 $ / piece
  • Variable SCADA platform cost: 61,920 $
  • Fixed engineering and cutover cost: 95,000 $

Run it with your numbers

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

Last reviewed 2026-05-12.