The Connectivity TCO Gap, and How It Scales
Ada re-derives this chapter’s own numbers step by step, at full precision
ADA · CALCULATION AUDIT
The Connectivity TCO Gap, and How It Scales
Over a five-year horizon the chapter costs a 50-sensor deployment two ways: cellular at $55K and LoRaWAN at $34K, a 38% saving. Scale the same fleet to 1,000 sensors and the totals become $1.1M versus $640K, and the saving widens to 42%. The interesting part is that the percentage moves, so this audit totals each ledger and takes the ratios to ask why the connectivity TCO gap grows with the fleet.
Companion to the chapter IoT Requirements and Characteristics — every number here comes from that chapter.
Ada: This chapter claims LoRaWAN beats cellular on five-year cost by 38% at 50 sensors and by 42% at 1,000 sensors. The interesting part is that the percentage moves, so let me total each ledger and take the ratios.
At 50 sensors:
- Cellular:
18,000 + 12,000 + 25,000 = 55,000dollars - LoRaWAN:
16,000 + 3,000 + 15,000 = 34,000dollars - Savings:
(55,000 - 34,000) / 55,000 = 21,000 / 55,000 = 0.3818 = 38.2%, rounded to 38%.
At 1,000 sensors:
- Cellular:
360,000 + 240,000 + 500,000 = 1,100,000dollars - LoRaWAN:
320,000 + 20,000 + 300,000 = 640,000dollars - Savings:
(1,100,000 - 640,000) / 1,100,000 = 460,000 / 1,100,000 = 0.4182 = 41.8%, rounded to 42%.
The gap widens from 38% to 42% as the fleet grows because LoRaWAN’s advantage lives in the per-sensor operating line — SIM fees and dense access points — not in the fixed gateway, so a technology choice that looks only marginally cheaper at pilot scale becomes decisively cheaper at deployment scale.
Every number above is taken from the chapter’s own material and re-derived step by step.