# Accuracy and precision
## MicroSim spec
- **Recommended sim type:** scatter / target
- **Microsimmability score:** 81/100
- **Layout:** drawing region (canvas) on top; control region (sliders/buttons) below.
### Parameters (tunable controls)
- `Bias (accuracy)`
- `Spread (precision)`
- `Sample size`
### What animates
Shots scatter on a target as bias and spread change; the cloud tightens and recenters while accuracy and precision readouts update.
### Learning objective
Distinguish accuracy from precision and relate both to bias and variance.
## Links (Wikipedia order)
<!-- injected from _registry/childlinks/Accuracy_and_precision.json (2026-07-30T02:09:12Z) -->
`110_film` · `126_film` · `135_film` · `A440_(pitch_standard)` · `ALGOL_60` · `ANSI_C` · `ANSI_escape_code` · `ASMO_449` · `Accepted_and_experimental_value` · `Ada_Semantic_Interface_Specification` · [[Adaptability]] · `Advanced_Video_Coding` · [[Algorithmic_efficiency]] · `Antimagnetic_watch` · `Arithmetic_mean` · `ArmSCII` · `Augmented_cognition` · `Automotive_fuse` · `Average` · `BLEU` · `Bias_(statistics)` · `Bias_of_an_estimator` · `Bias–variance_tradeoff` · `Binary_classification` · `British_Standard_Pipe` · `Business_Process_Model_and_Notation` · `C++` · `CAN_bus` · `CHILL` · `COBOL` · `COLLADA` · `C_Sharp_(programming_language)` · `Calibration` · `Calinski–Harabasz_index` · `Central_limit_theorem` · `Cloud_Infrastructure_Management_Interface` · `Cluster_analysis` · `Coefficient_of_determination` · `Cohen's_kappa` · `Common_Criteria` · `Common_Language_Infrastructure` · `Common_Logic` · `Common_Object_Request_Broker_Architecture` · `Computer_Graphics_Metafile` · [[Computer_programming]] · `Computer_vision` · `Confusion_matrix` · `Convolutional_neural_network` · [[Correctness_(computer_science)]] · `Cosine_similarity` · `Coverage_probability` · `Cronbach's_alpha` · `Cross-entropy` · `DICOM` · `Data_quality` · `Database` · `Davies–Bouldin_index` · `Deep_learning` · `Delivery_Multimedia_Integration_Framework` · `Digital_object_identifier` · `Discounted_cumulative_gain` · `Document_Style_Semantics_and_Specification_Language` · `Dunn_index` · `Dynamic_Adaptive_Streaming_over_HTTP` · `ECMAScript` · `ECMAScript_for_XML` · `EXPRESS_(data_modeling_language)` · `Electronic_circuit_simulation` · [[Engineering]] · `Engineering_tolerance` · `Equal-loudness_contour` · `Essential_Video_Coding` · `Euclidean_distance` · `Evaluation_measures_(information_retrieval)` · `Evaluation_of_binary_classifiers` · `Experimental_uncertainty_analysis` · `F-score` · `FDI_World_Dental_Federation_notation` · `FTAM` · `False_precision` · `Fiber_Distributed_Data_Interface` · `File_Allocation_Table` · `Film_speed` · [[Flexibility_(engineering)]] · `Floating-point_arithmetic` · `Flowchart` · `Fréchet_inception_distance` · `Fuel_oil` · `Full_BASIC` · `Geography_Markup_Language` · `Geospatial_metadata` · `Graph_Query_Language` · `Graphical_Kernel_System` · `Ground_truth` · `Guidelines_for_the_Definition_of_Managed_Objects` · `HTML` · `Han_Xin_code` · `Hazard_symbol` · `Hole_punch` · `Hopkins_statistic` · `Horsepower` · `Hot_shoe` · `IATF_16949` · `IS-IS` · `ISBN` · `ISLISP` · `ISO-8859-8-I` · `ISO-TimeML` · `ISO/IEC_10116` · `ISO/IEC_10967` · `ISO/IEC_11179` · `ISO/IEC_11404` · `ISO/IEC_11801` · `ISO/IEC_12207` · `ISO/IEC_14443` · `ISO/IEC_14651` · `ISO/IEC_15288` · `ISO/IEC_15504` · `ISO/IEC_15693` · `ISO/IEC_15897` · `ISO/IEC_17024` · `ISO/IEC_17025` · `ISO/IEC_18014` · `ISO/IEC_19752` · `ISO/IEC_19770` · `ISO/IEC_19794-5` · `ISO/IEC_20000` · `ISO/IEC_2022` · `ISO/IEC_21827` · `ISO/IEC_27000` · `ISO/IEC_27000_family` · `ISO/IEC_27001` · `ISO/IEC_27002` · `ISO/IEC_27005` · `ISO/IEC_27006` · `ISO/IEC_38500` · `ISO/IEC_42010` · `ISO/IEC_4909` · `ISO/IEC_5218` · `ISO/IEC_646` · `ISO/IEC_6523` · `ISO/IEC_7064` · `ISO/IEC_7810` · `ISO/IEC_7811` · `ISO/IEC_7812` · `ISO/IEC_7813` · `ISO/IEC_7816` · `ISO/IEC_80000` · `ISO/IEC_8652` · `ISO/IEC_8859` · `ISO/IEC_8859-1` · `ISO/IEC_8859-10` · `ISO/IEC_8859-11` · `ISO/IEC_8859-13` · `ISO/IEC_8859-14` · `ISO/IEC_8859-15` · `ISO/IEC_8859-16` · `ISO/IEC_8859-2` · `ISO/IEC_8859-3` · `ISO/IEC_8859-4` · `ISO/IEC_8859-5` · `ISO/IEC_8859-6` · `ISO/IEC_8859-7` · `ISO/IEC_8859-8` · `ISO/IEC_8859-9` · `ISO/IEC_9126` · `ISO/IEC_9529` · `ISO/IEC_9797-1` · `ISO/IEC_9995` · `ISO/IEC_TR_12182` · `ISO/IEEE_11073` · `ISO/TR_11941` · `ISO_1` · `ISO_1000` · `ISO_10006` · `ISO_10007` · `ISO_10160` · `ISO_10161` · `ISO_10218` · `ISO_10303` · `ISO_10303-21` · `ISO_10303-22` · `ISO_10303-28` · `ISO_10628` · `ISO_10962` · `ISO_11170` · `ISO_11783` · `ISO_11784_and_ISO_11785` · `ISO_11940` · `ISO_11940-2` · `ISO_11992` · `ISO_12006` · `ISO_128` · `ISO_13399` · `ISO_13406-2` · `ISO_13485` · `ISO_13490` · `ISO_13567` · `ISO_13584` · `ISO_14000_family` · `ISO_14031` · `ISO_14224` · `ISO_14617` · `ISO_14644` · `ISO_14698` · `ISO_14971` · `ISO_15022` · `ISO_15118` · `ISO_15189` · `ISO_15398` · `ISO_15686` · `ISO_15919` · `ISO_15924` · `ISO_15926` · `ISO_15926_WIP` · `ISO_1629` · `ISO_16750` · `ISO_17100` · `ISO_1745` · `ISO_18245` · `ISO_19011` · `ISO_19092` · `ISO_19114` · `ISO_19439` · `ISO_19600` · `ISO_19650` · `ISO_2` · `ISO_20022` · `ISO_20121` · `ISO_2033` · `ISO_20400` · `ISO_2047` · `ISO_21001` · `ISO_2145` · `ISO_2146` · `ISO_21500` · `ISO_217` · `ISO_22000` · `ISO_22300` · `ISO_22301` · `ISO_22395` · `ISO_233` · `ISO_25178` · `ISO_259` · `ISO_25964` · `ISO_26000` · `ISO_26262` · `ISO_2709` · `ISO_2788` · `ISO_28000` · `ISO_2848` · `ISO_2852` · `ISO_2921` · `ISO_31` · `ISO_31-0` · `ISO_31-1` · `ISO_31-10` · `ISO_31-11` · `ISO_31-3` · `ISO_31-4` · `ISO_31-5` · `ISO_31-6` · `ISO_31-7` · `ISO_31-8` · `ISO_31000` · `ISO_3103` · `ISO_3166` · `ISO_3166-1` · `ISO_3166-2` · `ISO_3166-3` · `ISO_37001` · `ISO_3864` · `ISO_3977` · `ISO_4` · `ISO_4165` · `ISO_4217` · `ISO_45001` · `ISO_50001` · `ISO_5426` · `ISO_5427` · `ISO_5428` · `ISO_55000` · `ISO_56000` · `ISO_5775` · `ISO_5776` · `ISO_5964` · `ISO_6344` · `ISO_6346` · `ISO_6385` · `ISO_639` · `ISO_639-1` · `ISO_639-2` · `ISO_639-3` · `ISO_639-5` · `ISO_639-6` · `ISO_6438` · `ISO_668` · `ISO_6709` · `ISO_690` · `ISO_6943` · `ISO_7001` · `ISO_7002` · `ISO_7010` · `ISO_7027` · `ISO_7200` · `ISO_732` · `ISO_7637` · `ISO_7736` · `ISO_8000` · `ISO_8178` · `ISO_843` · `ISO_8583` · `ISO_8601` · `ISO_8691` · `ISO_898` · `ISO_9` · `ISO_9000_family` · `ISO_9241` · `ISO_9362` · `ISO_9564` · `ISO_965` · `ISO_9660` · `ISO_9897` · `ISO_999` · `ISO_base_media_file_format` · `ISO_metric_screw_thread` · `ISSN` · `ImageNet` · `Inception_score` · `Information_quality` · `International_Bank_Account_Number` · `International_Organization_for_Standardization` · `International_Securities_Identification_Number` · `International_Standard_Atmosphere` · `International_Standard_Audiovisual_Number` · `International_Standard_Identifier_for_Libraries_and_Related_Organizations` · `International_Standard_Music_Number` · `International_Standard_Musical_Work_Code` · `International_Standard_Name_Identifier` · `International_Standard_Recording_Code` · `International_Standard_Text_Code` · `Isofix` · `JBIG` · `JPEG_2000` · `JPEG_XL` · `JPEG_XR` · `JPEG_XS` · `JPIP` · `JSON` · `Jaccard_index` · `Kappa_number` · `Knowledge_Discovery_Metamodel` · `Kunrei-shiki` · `LCEVC` · `Language_of_Temporal_Ordering_Specification` · `Legal_Entity_Identifier` · `Lexical_Markup_Framework` · `Linguistic_categories` · `Linux_Standard_Base` · `List_of_IEC_standards` · `List_of_ISO_romanizations` · `List_of_ISO_standards` · `List_of_system_quality_attributes` · `Logic_simulation` · `Longitudinal_redundancy_check` · [[Loose_coupling]] · `MAUVE_(metric)` · `MP4_file_format` · `MPEG-1` · `MPEG-2` · `MPEG-21` · `MPEG-4` · `MPEG-4_Part_11` · `MPEG-4_Part_2` · `MPEG-4_Part_3` · `MPEG-7` · `MPEG-A` · `MPEG-D` · `MPEG-G` · `MPEG-H` · [[Machine_learning]] · `Magnetic_ink_character_recognition` · [[Maintainability]] · `Manufacturing_Message_Specification` · `Market_Identifier_Code` · `MathML` · `MaxiCode` · `Mean_absolute_error` · `Mean_absolute_percentage_error` · `Mean_absolute_scaled_error` · `Mean_directional_accuracy` · `Mean_reciprocal_rank` · `Mean_squared_error` · `Mean_squared_prediction_error` · `Measurement` · `Measurement_uncertainty` · `Median_absolute_deviation` · `Message_Transmission_Optimization_Mechanism` · `Meta-Object_Facility` · `MicroPDF417` · `Minimal_BASIC` · `Mixed_raster_content` · `Motion_JPEG_2000` · `Multibus` · `National_Institute_of_Standards_and_Technology` · `Natural_language_processing` · [[Non-functional_requirement]] · `Numerical_analysis` · `O-ring` · `OCR-A` · `OCR-B` · `OSI_model` · `Object_Constraint_Language` · `Observational_error` · `Office_Open_XML` · `On-board_diagnostics` · `OpenDocument` · `Open_Data_Protocol` · `Open_Document_Architecture` · `Open_Virtualization_Format` · [[Orthogonality_(programming)]] · `P4-metric` · `PDF` · `PDF/A` · `PDF/E` · `PDF/UA` · `PDF/VT` · `PDF/X` · `PDF417` · `PHIGS` · `POSIX` · `Pascal_(programming_language)` · `Pearson_correlation_coefficient` · `Perplexity` · `Phi_coefficient` · `Photographic_Activity_Test` · `Pinyin` · `Power_take-off` · `Pre-_and_post-test_probability` · `Precision_(statistics)` · `Precision_and_recall` · [[Probability]] · `Probability_distribution` · `Process_Specification_Language` · `Prolog` · `Prontor-Compur` · `Psychometrics` · `Psychophysics` · `QR_code` · `Quality_function_deployment` · `Quantity` · `RELAX_NG` · `RM-ODP` · `Rand_index` · `Ranking_(information_retrieval)` · `Receiver_operating_characteristic` · [[Recommender_system]] · `Rectangular_Micro_QR_Code` · `Regression_analysis` · `Reliability_(statistics)` · [[Reliability_engineering]] · `Renard_series` · [[Repeatability]] · `Reproducibility` · [[Requirements_engineering]] · `Result` · [[Reusability]] · [[Robustness_(computer_science)]] · `Romanization_of_Armenian` · `Romanization_of_Georgian` · `Root_mean_square` · `Root_mean_square_deviation` · `Ruby_(programming_language)` · `SDMX` · `SQL` · `STEP-NC` · `Salt_spray_test` · [[Scalability]] · [[Science]] · `Scientific_method` · `Sensitivity_and_specificity` · `Shock-resistant_watch` · `Shoe_size` · `Significant_figures` · `Silhouette_(clustering)` · `Similarity_measure` · `Simple_Features` · `Simple_matching_coefficient` · `SoftWare_Hash_IDentifier` · `Software_maintenance` · [[Software_portability]] · [[Software_quality]] · [[Software_quality_assurance]] · [[Software_quality_control]] · [[Software_quality_management]] · [[Software_sizing]] · [[Software_testability]] · `Standard_Generalized_Markup_Language` · `Standard_deviation` · `Standards_organization` · `Statistical_classification` · `Statistical_significance` · `Statistics` · `Structural_similarity_index_measure` · `Symmetric_mean_absolute_percentage_error` · `TED_(conference)` · `TIFF/EP` · `Technical_standard` · `Topic_map` · `Torx` · `Traceability` · [[Transistor]] · `Trusted_Platform_Module` · `Unified_Modeling_Language` · `Universal_Coded_Character_Set` · [[Usability]] · `Validity_(statistics)` · `Value_(mathematics)` · `Versatile_Video_Coding` · `Vicat_softening_point` · `WS-Addressing` · `Water_Resistant_mark` · [[Wayback_Machine]] · `Web_Content_Accessibility_Guidelines` · `Whirlpool_(hash_function)` · `X.500` · `X3D` · `XML_Metadata_Interchange` · `Z_notation`
## From the Real GENERATIVE library
*Accuracy and precision — placed from the Real G.E.N.E.R.A.T.I.V.E. course library (Information room). Source: Wikimedia Commons (via Wikipedia article media). [Details & license](https://commons.wikimedia.org/wiki/File:Accuracy_and_precision.svg).*
> Accuracy and precision are two measures of observational error. Accuracy is how close a given set of measurements (observations or readings) are to their true value. ([Wikipedia](https://en.wikipedia.org/wiki/Accuracy_and_precision))
<!-- REAL-GENERATIVE-MEDIA:END -->
> p5.js MicroSim stub · part of System Quality Attributes · [Wikipedia source](https://en.wikipedia.org/wiki/Accuracy_and_precision)
> Relation: subfield of system quality attributes.
## Concept summary
Accuracy is closeness to the true value; precision is [[Repeatability|repeatability]]. Together they describe measurement and estimation quality.
## 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: Accuracy and precision
let controls = {};
function setup() {
// createCanvas(...); create sliders for the parameters above.
}
function draw() {
// background(...); read controls; render scatter / target; respond live.
}
```
---
Back to System Quality Attributes · Wikipedia: [Accuracy and precision](https://en.wikipedia.org/wiki/Accuracy_and_precision)
---
<!-- 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 (3):** 🟡 system (5) · 🟢 measurement (1) · 🟢 sampling (1)
**Enter by sign:** Systems Semiotic Gateway · Alphabetum · Icon Registry · ← Systems Portal
<!-- SEMIOTIC-PROFILE:END -->
<!-- REAL-GENERATIVE-MEDIA:START -->
<!-- SPINEPATH:BEGIN g20 — shortest chain of Wikipedia links between local articles to a Compendium Main article; do not hand-edit inside -->
*Connected to the Apex Spine:* Accuracy and precision → [[Geographic_information_system|Geographic information system]] → [[Hydrology|Hydrology]] — [[WT!Thury_Hydrodynamics_Compendium|Compendium]] section 19, *Hydrology*.
<!-- SPINEPATH:END -->
## Wikipedia : Wikitube
**Strict pair:** [Wikipedia](https://en.wikipedia.org/wiki/Accuracy_and_precision) : [Wikitube](https://en.wikitube.io/wiki/Accuracy_and_precision)
## Previous hub tags
Tree parent: [[Reliability_engineering]].
Legacy hubs: none.
---
*Sources: 1 legacy note. Minted wave 1, 2026-07-30 (v1.6 order).*