# Observability
## MicroSim spec
- **Recommended sim type:** telemetry / inference
- **Microsimmability score:** 81/100
- **Layout:** drawing region (canvas) on top; control region (sliders/buttons) below.
### Parameters (tunable controls)
- `Telemetry coverage`
- `Signal noise`
- `Sampling rate`
### What animates
Hidden internal state is reconstructed from sampled telemetry; the inference-error gauge shrinks as coverage and sampling rise.
### Learning objective
Relate state-inference accuracy to telemetry coverage and sampling.
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Observability.json (2026-07-30T02:09:12Z) -->
`Adaptive_control` · `Algebraic_curve` · `Automation_and_Remote_Control` · [[Block_diagram]] · `Bode_plot` · `Closed-loop_controller` · `Closed-loop_transfer_function` · `Coefficient_diagram_method` · `Continuous_function` · `Control_reconfiguration` · [[Control_theory]] · `Controllability` · `Data_validation_and_reconciliation` · `Digital_control` · [[Digital_signal_processing]] · `Distributed_control_system` · `Distributed_parameter_system` · `Duality_(mathematics)` · [[Dynamical_system]] · [[Electric_motor]] · `Embedded_system` · `Energy-shaping_control` · `Fourier_transform` · `Fractional-order_control` · [[Frequency_response]] · [[Fuzzy_control_system]] · `Fuzzy_logic` · `H-infinity_loop-shaping` · `Hankel_singular_value` · `Hautus_lemma` · `Hybrid_computer` · `Industrial_control_system` · `Intelligent_control` · [[Kalman_filter]] · `Krener's_theorem` · [[Laplace_transform]] · `Lead–lag_compensator` · `Least_squares` · `Lie_derivative` · `Linear_map` · [[Lyapunov_stability]] · [[MIMO]] · `Matrix_differential_equation` · [[Mechatronics]] · `Minor_loop_feedback` · [[Model_predictive_control]] · `Motion_control` · `Natural_number` · [[Negative_feedback]] · `Nonlinear_control` · `Observable` · [[Optimal_control]] · [[PID_controller]] · [[Perceptual_control_theory]] · `Performance` · [[Physical_system]] · `PlanetMath` · [[Positive_feedback]] · `Programmable_logic_controller` · [[Quantization_(signal_processing)]] · `Rank_(linear_algebra)` · [[Real-time_computing]] · [[Robotics]] · `Robust_control` · `Root_locus_analysis` · `Rudolf_E._Kálmán` · `SCADA` · [[Sensor]] · `Servomechanism` · [[Signal-flow_graph]] · `Stability_theory` · `State-space_representation` · `State-transition_matrix` · `State_observer` · `Steady_state` · `Stochastic_control` · `Structural_identifiability` · `Symmetric_matrix` · [[System]] · [[System_dynamics]] · [[System_identification]] · `Time-variant_system` · [[Transfer_function]] · [[Wayback_Machine]] · [[Z-transform]]
> p5.js MicroSim stub · part of System Quality Attributes · [Wikipedia source](https://en.wikipedia.org/wiki/Observability)
> Relation: subfield of system quality attributes.
## Concept summary
Observability is the degree to which a [[System|system]]'s internal state can be inferred from its external outputs (logs, metrics, traces).
## Build checklist
- [ ] Claim it: set `status: in-progress` + `lease` + `leased_at`
- [ ] Write the child page explaining the concept (tie it back to system quality attributes)
- [ ] Finalize parameter ranges and defaults
- [ ] Implement the p5.js sketch (drawing + control regions)
- [ ] Add caption + the learning objective on the page
- [ ] Set `status: done`
## p5.js sketch
```javascript
// MicroSim: Observability
let controls = {};
function setup() {
// createCanvas(...); create sliders for the parameters above.
}
function draw() {
// background(...); read controls; render telemetry / inference; respond live.
}
```
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Back to System Quality Attributes · Wikipedia: [Observability](https://en.wikipedia.org/wiki/Observability)
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<!-- SEMIOTIC-PROFILE:START -->
## Semiotic profile
> *The semiotic universals this article invokes, machine-derived from the crossref — **unverified** (born so). Populated 2026-07-06 for the Systems room.*
**Universals (4):** 🟡 system (7) · 🟢 sampling (4) · 🟢 noise (1) · 🟢 signal (1)
**Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal
<!-- SEMIOTIC-PROFILE:END -->
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Observability) : [Wikitube](https://en.wikitube.io/wiki/Observability)
## Previous hub tags
Tree parent: [[Control_theory]].
Legacy hubs: none.
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*Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*