# Dependability
## MicroSim spec
- **Recommended sim type:** probability-montecarlo
- **Microsimmability score:** 28/100
- **Layout:** drawing region (canvas) on top; control region (sliders/buttons) below.
### Parameters (tunable controls)
- `Trials` (number of random samples)
- `Failure rate λ` (component hazard rate)
- `Redundancy` (number of parallel/backup units)
### What animates
Random trials accumulate on the canvas while an estimate (reliability, failure probability) converges as trials and redundancy change.
### Learning objective
Relate system reliability and risk to component failure rate and redundancy.
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Dependability.json (2026-07-30T02:09:12Z) -->
`ACM_Computing_Classification_System` · `Accessibility` · [[Algorithm]] · [[Algorithmic_efficiency]] · `Analysis_of_algorithms` · `Andrea_Bondavalli` · `Application_security` · [[Artificial_intelligence]] · [[Augmented_reality]] · `Automata_theory` · `Automated_planning_and_scheduling` · [[Availability]] · `Brian_Randell` · [[Communication_protocol]] · `Computability_theory` · `Computational_biology` · `Computational_chemistry` · `Computational_complexity` · `Computational_complexity_theory` · `Computational_engineering` · `Computational_geometry` · `Computational_intelligence` · `Computational_mathematics` · `Computational_physics` · `Computational_problem` · `Computational_social_science` · `Computer_accessibility` · `Computer_animation` · [[Computer_architecture]] · `Computer_data_storage` · `Computer_graphics` · [[Computer_hardware]] · `Computer_network` · [[Computer_science]] · `Computer_security` · `Computer_vision` · `Computing` · `Computing_platform` · `Concurrency_(computer_science)` · `Concurrent_computing` · `Confidentiality` · `Control_flow` · [[Control_theory]] · `Cross-validation_(statistics)` · `Cryptography` · `Cyber-physical_system` · `Cyberwarfare` · `Data_mining` · `Database` · `Decision_support_system` · `Digital_art` · [[Digital_library]] · `Digital_marketing` · `Discrete_mathematics` · `Distributed_artificial_intelligence` · `Distributed_computing` · `Document_management_system` · `Domain-specific_language` · `E-commerce` · `Educational_technology` · `Electronic_design_automation` · `Electronic_publishing` · `Electronic_voting` · `Embedded_system` · `Enterprise_information_system` · `Enterprise_software` · `Extended_reality` · `Fault_injection` · [[Fault_tolerance]] · `Form_factor_(design)` · `Formal_language` · `Formal_methods` · `Geographic_information_system` · [[Graphics_processing_unit]] · `Green_computing` · `Hardware_acceleration` · `Hardware_security` · `Health_informatics` · `Human-centered_computing` · `Human–computer_interaction` · `IEEE_Transactions_on_Dependable_and_Secure_Computing` · `ISSRE` · [[Image_compression]] · [[Industrial_process_control]] · `Information_retrieval` · `Information_security` · [[Information_system]] · [[Information_theory]] · `Integrated_circuit` · `Integrated_development_environment` · `Integrity` · `Interaction_design` · `International_Conference_on_Dependable_Systems_and_Networks` · `International_Electrotechnical_Commission` · `Interpreter_(computing)` · `Intrusion_detection_system` · `Knowledge_representation_and_reasoning` · `Laboratory_for_Analysis_and_Architecture_of_Systems` · `Library_(computing)` · `List_of_computer_size_categories` · `List_of_system_quality_attributes` · `Logic_in_computer_science` · [[Machine_learning]] · [[Maintainability]] · `Mathematical_analysis` · [[Mathematical_optimization]] · [[Mathematical_software]] · `Middleware` · `Mobile_computing` · `Model_of_computation` · `Modeling_language` · `Multi-task_learning` · `Multimedia_database` · [[Multiprocessing]] · [[Multithreading_(computer_architecture)]] · `Natural_language_processing` · `Network_architecture` · `Network_performance` · `Network_scheduler` · `Network_security` · `Network_service` · `Networking_hardware` · `Numerical_analysis` · `Open_source` · `Operating_system` · [[Operations_research]] · `Outline_of_computer_science` · `Oxford_English_Dictionary` · `Paola_Inverardi` · `Parallel_computing` · `Peripheral` · `Philosophy_of_artificial_intelligence` · `Photograph_manipulation` · `Printed_circuit_board` · [[Probability]] · `Processor_(computing)` · `Programming_language` · `Programming_language_theory` · `Programming_paradigm` · `Programming_team` · `Programming_tool` · [[Quantum_computing]] · `Randomized_algorithm` · [[Real-time_computing]] · [[Reinforcement_learning]] · [[Reliability_engineering]] · `Rendering_(computer_graphics)` · `Requirements_analysis` · `Safety` · [[Safety_engineering]] · `Security` · `Security_hacker` · `Security_service_(telecommunication)` · `Service-oriented_architecture` · `Social_computing` · `Social_software` · `Software_configuration_management` · `Software_construction` · `Software_deployment` · `Software_design` · `Software_development` · `Software_development_process` · [[Software_engineering]] · `Software_framework` · `Software_maintenance` · [[Software_quality]] · `Software_repository` · `Solid_modeling` · `Statistics` · `Stochastic_computing` · `Supervised_learning` · `Survivability` · `System_on_a_chip` · [[Systems_engineering]] · `Theoretical_computer_science` · `Theory_of_computation` · `Ubiquitous_computing` · `Unsupervised_learning` · [[Very-large-scale_integration]] · `Video_game` · `Virtual_machine` · [[Virtual_reality]] · `Visualization_(graphics)` · [[Wayback_Machine]] · `Wireless_sensor_network` · `Word_processor` · `World_Wide_Web`
## From the Real GENERATIVE library (beauty pass)
*Dependability — image hotlinked from Wikimedia Commons (via the Real G.E.N.E.R.A.T.I.V.E. course library, Information room). [Details & license](https://commons.wikimedia.org/wiki/File:Dep-1.svg).*
> In systems engineering, dependability is a measure of a system's availability, reliability, maintainability, and in some cases, other characteristics such as durability, safety and security.[1] In real-time computing, dependability is the ability to provide services that can be trusted within a time-period.[2] The service guarantees must hold even when the system is subject to attacks or natural failures. ([Wikipedia](https://en.wikipedia.org/wiki/Dependability))
<!-- BEAUTY-PASS-MEDIA:END -->
> p5.js MicroSim stub · part of Systems Engineering · [Wikipedia source](https://en.wikipedia.org/wiki/Dependability)
> Relation: subfield of systems engineering.
## Concept summary
In systems engineering, dependability is a measure of a [[System|system]]'s [[Availability|availability]], reliability, [[Maintainability|maintainability]], and in some cases, other characteristics such as durability, safety and security.[1] In real-time computing, dependability is the ability to provide services that can be trusted wi...
## Build checklist
- [ ] Claim it: set `status: in-progress` + `lease` + `leased_at`
- [ ] Write the child page explaining the concept (tie it back to systems engineering)
- [ ] 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: Dependability
let controls = {};
function setup() {
// createCanvas(...); create sliders for the parameters above.
}
function draw() {
// background(...); read controls; render probability-montecarlo; respond live.
}
```
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Back to Systems Engineering
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## 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 (16) · 🟢 probability (6) · 🟢 measurement (1) · 🟢 sampling (1)
**Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal
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<!-- BEAUTY-PASS-MEDIA:START -->
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Dependability) : [Wikitube](https://en.wikitube.io/wiki/Dependability)
## Previous hub tags
Tree parents: [[Graph_theory]] · [[Information_theory]] · [[Reliability_engineering]] · [[Systems_engineering]].
Legacy hubs: none.
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*Sources: 2 legacy notes. Minted wave 1, 2026-07-30 (v1.6 order).*