Instrumentation priority matrix — two-site smart farm
Purpose
Rank where automation earns its keep first for a 35-minute separated operation: trip reduction, risk reduction, and labor relief—with explicit cost of false positives and maintenance.
Architecture package: Reference architecture — 5 ac + 120 ac. Aligns with East Tennessee two-site farm business plan — smart-tech strategy and Field telemetry reference architecture — homestead + 120-acre farm. Financial shell (payback inputs, OPEX, triage hours): Instrumentation ROI model.
First acres, first risks, first systems
Intent: Order work so instrumentation follows operational truth—water, power, access—not dashboard novelty.
First acres (where to instrument before “everywhere”)
| Priority |
Land / infrastructure |
Why first |
| P0 |
Water delivery points stock depend on |
Welfare + highest trip ROI |
| P0 |
Pump / electrical head for that water |
Silent failure modes |
| P1 |
Lanes / gates on critical paths |
Escape and labor if motorized |
| P2 |
Representative paddock for grazing pressure |
Not every acre on day one |
First risks (what failure must surface early)
| Risk class |
Example signal |
Manual cross-check |
| Dehydration / dry tank |
Level / flow / pump run |
Visual schedule |
| Unknown pump state |
Current, pressure, run hours |
Physical at asset |
| Power loss at remote hub |
UPS / battery / generator status |
Visit + sound |
| Fence breach (if instrumented) |
Break detection (optional) |
Patrol still required |
First systems (stack order—not brands)
| Order |
System |
Role |
| 1 |
Stable field → hub comms |
Nothing else matters if backhaul is flaky |
| 2 |
Time sync at edges |
Comparable logs—Timing on the farm — synthesis |
| 3 |
Durable telemetry store (SoR rules) |
History for debugging and trend |
| 4 |
Dashboards / automation |
After 1–3 are credible |
See Telemetry system of record — boundaries and authority.
Key decisions supported
| Decision |
Use matrix for |
| Phase 1 pilot sensor |
Only rows scoring high on trip ROI + feasible install |
| OPEX cap |
Sum annual subscription + spares for enabled rows |
| What NOT to buy |
Low trip ROI + high alert fatigue |
| Manual proof first |
Rows with “manual first” gate unchecked → no remote control |
Scoring columns (1–5 each; total /25 optional)
| Criterion |
Meaning |
| Trip ROI |
Reduces unnecessary SITE_FARM visits |
| Risk |
Prevents catastrophic loss (stock, crop, equipment) |
| Labor |
Reduces hours (not just miles) |
| Capital |
Reasonable CAPEX for phase (5 = cheap pilot) |
| Ops burden |
Low false positives, spares available, simple triage |
Priority matrix (fill)
| ID |
Instrument / signal |
Trip ROI |
Risk |
Labor |
Capital |
Ops burden |
Manual proof first? |
Phase target |
Notes |
| I1 |
Tank / trough level |
|
|
|
|
|
Y—stick log 30d |
0–1 |
|
| I2 |
Pump run / fault / pressure |
|
|
|
|
|
Y |
1 |
|
| I3 |
Gate position (if motorized) |
|
|
|
|
|
Y—safe default |
2 |
|
| I4 |
Power / generator / UPS at critical loads |
|
|
|
|
|
partial |
0–1 |
home + farm |
| I5 |
Soil moisture (point) |
|
|
|
|
|
Y—calibrate to crop |
3+ |
defer if grazing-only |
| I6 |
Weather station |
|
|
|
|
|
optional |
1 |
|
| I7 |
Cameras |
|
|
|
|
|
policy first |
2+ |
privacy, triage load |
| I8 |
GPS collars / tags |
|
|
|
|
|
market proof |
3+ |
OPEX heavy |
| I9 |
Irrigation valve control |
|
|
|
|
|
walk lines first |
3+ |
|
Automate early (typical winners)
- Water visibility + pump fault: highest trip ROI for remote pasture.
- Power awareness at remote pump or gateway: explains silent failures.
Automate late or never (until gates pass)
| Item |
Why wait |
| Camera everywhere |
Bandwidth, storage, alert noise |
| Remote chute / feed actuation |
Safety + liability |
| Full irrigation automation |
Crop commitment + skill |
Manual-before-automation checklist
Known / assumed / open
| Class |
Content |
| Known |
Business plan prioritizes telemetry with degraded modes |
| Assumed |
LTE or fallback at SITE_HOME acceptable for non-life alerts |
| Open |
Radio technology choice (LoRaWAN vs Meshtastic); exact tank count |
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