# Maintainability
## MicroSim spec
- **Recommended sim type:** repair / MTTR
- **Microsimmability score:** 87/100
- **Layout:** drawing region (canvas) on top; control region (sliders/buttons) below.
### Parameters (tunable controls)
- `Module coupling`
- `Diagnostic coverage`
- `Crew skill`
### What animates
A fault is localized and repaired across a module graph; mean-time-to-repair shrinks as [[Coupling|coupling]] drops and diagnostics improve.
### Learning objective
Relate repair time to coupling, diagnosability, and skill.
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Maintainability.json (2026-07-30T02:09:12Z) -->
[[Accuracy_and_precision]] · [[Adaptability]] · [[Algorithmic_efficiency]] · `Boca_Raton,_Florida` · `CRC_Press` · `Code_smell` · [[Computer_programming]] · `Consumerism` · `Copyright_status_of_works_by_the_federal_government_of_the_United_States` · [[Correctness_(computer_science)]] · [[Engineering]] · [[Flexibility_(engineering)]] · `General_Services_Administration` · `ISO/IEC_9126` · `International_Organization_for_Standardization` · `List_of_system_quality_attributes` · [[Loose_coupling]] · `MIL-STD-188` · `Maintenance` · [[Non-functional_requirement]] · [[Orthogonality_(programming)]] · `Reliability,_availability,_maintainability_and_safety` · [[Reliability_engineering]] · `Repairability` · [[Reusability]] · [[Robustness_(computer_science)]] · [[Scalability]] · [[Software_engineering]] · `Software_maintenance` · [[Software_portability]] · [[Software_quality]] · [[Software_quality_assurance]] · [[Software_quality_control]] · [[Software_quality_management]] · [[Software_sizing]] · [[Software_testability]] · `Technical_debt` · [[Telecommunications]] · `Throw-away_society` · `Time` · [[Usability]]
## From the Real GENERATIVE library
*Maintainability — placed from the Real G.E.N.E.R.A.T.I.V.E. course library (Engineering room). Source: Wikimedia Commons (via Wikipedia article media). [Details & license](https://commons.wikimedia.org/wiki/File:PD-icon.svg).*
> Maintainability is the ease of maintaining or providing maintenance for a functioning product or service. Depending on the field, it can have slightly different meanings. ([Wikipedia](https://en.wikipedia.org/wiki/Maintainability))
<!-- REAL-GENERATIVE-MEDIA:END -->
> p5.js MicroSim stub · part of System Quality Attributes · [Wikipedia source](https://en.wikipedia.org/wiki/Maintainability)
> Relation: subfield of system quality attributes.
## Concept summary
Maintainability is the ease and speed with which a [[System|system]] can be repaired, modified, or restored to working order.
## 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: Maintainability
let controls = {};
function setup() {
// createCanvas(...); create sliders for the parameters above.
}
function draw() {
// background(...); read controls; render repair / MTTR; respond live.
}
```
---
Back to System Quality Attributes · Wikipedia: [Maintainability](https://en.wikipedia.org/wiki/Maintainability)
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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 (1):** 🟡 system (7)
**Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal
<!-- SEMIOTIC-PROFILE:END -->
<!-- REAL-GENERATIVE-MEDIA:START -->
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Maintainability) : [Wikitube](https://en.wikitube.io/wiki/Maintainability)
## Previous hub tags
Tree parents: [[Reliability_engineering]] · [[Systems_engineering]].
Legacy hubs: none.
---
*Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*