{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.cyclic-process","code":"thing-q2692606","url":"https://ver.cy/models/thing/q2692606/","name":"cyclic process","alternateNames":["astronomical cycle","data lifecycle","glacial cycle","research cycle","freeze-thaw cycle","operating cycle","biochemical cycle","waveform cycle","area life cycle","policy cycle","geologic cycle","firing cycle"],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Activities and processes","entryKind":"thing","plane":"ACT","domain":["ACT.PRC"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A process that repeats through a sequence of states or stages returning to its starting condition, such as astronomical cycles, glacial cycles, freeze-thaw cycles, biological and biochemical cycles, engine operating cycles, data and product lifecycles and research cycles; cyclic processes are described by period, phases and drivers, modelled in science and engineering, and used to structure work and management.","purpose":"Let an agent explain cyclic processes and their characteristics, identify cycles in nature, technology and organisations, describe modelling of cycles, and support learning.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Repetition","Phases","Period","Cross-domain"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What a cyclic process is.","layers":[{"id":"concept","name":"Concept","description":"Concept and features.","findings":[{"id":"concept-finding","name":"Concept","description":"Concept.","questions":[{"text":"What defines a cyclic process, and what are period, phase, amplitude and drivers?","kind":"definition"},{"text":"Which domain cycle is meant here?","kind":"boundary"}]}]},{"id":"examples","name":"Examples","description":"Cycles by domain.","findings":[{"id":"examples-finding","name":"Examples","description":"Examples.","questions":[{"text":"What are examples of cycles in astronomy, geology, biology, engineering and organisations?","kind":"definition"},{"text":"Which entry fits a specific cycle?","kind":"action"}]}]}]},{"id":"model","name":"Model","description":"Modelling cycles.","layers":[{"id":"analyse","name":"Analyse","description":"Analysing cycles.","findings":[{"id":"analyse-finding","name":"Analyse","description":"Analysis.","questions":[{"text":"How are cycles detected and modelled with time series, spectral analysis and dynamical systems?","kind":"provenance"},{"text":"How can this data be tested for cyclicity?","kind":"action"}]}]},{"id":"predict","name":"Predict","description":"Prediction and limits.","findings":[{"id":"predict-finding","name":"Predict","description":"Prediction.","questions":[{"text":"How reliably can cycles be predicted, and what are the limits, such as for glacial or economic cycles?","kind":"boundary"},{"text":"Which findings are contested?","kind":"boundary"}]}]}]},{"id":"apply","name":"Apply","description":"Cycles in practice.","layers":[{"id":"engineering","name":"Engineering","description":"Engineering cycles.","findings":[{"id":"engineering-finding","name":"Engineering","description":"Engineering.","questions":[{"text":"How are operating cycles, duty cycles and fatigue cycles used in engineering design and testing?","kind":"provenance"},{"text":"Which entry fits fatigue?","kind":"action"}]}]},{"id":"management","name":"Management","description":"Lifecycles.","findings":[{"id":"management-finding","name":"Management","description":"Lifecycles.","questions":[{"text":"How are data, product and research lifecycles structured and managed?","kind":"provenance"},{"text":"Which entry fits lifecycle management?","kind":"action"}]}]}]},{"id":"learn","name":"Learn","description":"Thought and teaching.","layers":[{"id":"thought","name":"Thought","description":"Cycles in thought.","findings":[{"id":"thought-finding","name":"Thought","description":"Thought.","questions":[{"text":"How have philosophies and cultures conceived of cyclic time, with views attributed?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"teach","name":"Teach","description":"Teaching.","findings":[{"id":"teach-finding","name":"Teach","description":"Teaching.","questions":[{"text":"How can cyclic processes be taught across subjects?","kind":"action"},{"text":"Which misconceptions arise?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Model and report cyclic processes, stating period, phase and uncertainty.","Count load cycles on components it monitors and report fatigue limits."],"mustNot":["Present a cycle as perfectly periodic when the data show variation.","Claim cyclic causation from correlation alone.","Keep a component in service past its rated cycle count."],"requiresHuman":["Retiring or extending the life of a part based on its cycle history."]},"ethics":{"considerations":["Fatigue from repeated cycles causes sudden structural failures that hurt people.","Forecasts from assumed cycles can mislead decisions about economies and climate."],"affectedParties":["Users of machines and structures","Forecast users","Students"]},"owners":{"steward":"Nobody owns the concept; the owner of each system answers for its cycles.","roles":[],"masterSystems":[]},"relations":[{"target":"Q2083958","type":"parent","note":"registry parent class"},{"target":"Q3249551","type":"parent","note":"registry parent class"},{"target":"process","type":"related","note":"category"},{"target":"pattern","type":"related","note":"category"},{"target":"thermodynamics","type":"related","note":"thermodynamic cycles"},{"target":"frost heave","type":"related","note":"freeze-thaw cycles"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.cyclic-process","Wikidata: Q2692606 (https://www.wikidata.org/wiki/Q2692606)"]},"properties":{"applicability":"not-applicable","items":[]},"recognition":{"applicability":"optional","items":["Returns to starting state","Period and phases","A linear process ends without returning; oscillation may not be a full cycle","Not physical; patterns of repetition."]},"capabilities":{"applicability":"required","items":["explain characteristics","identify cycles across domains","describe modelling","support learning"]},"hazards":{"applicability":"required","items":["Assuming cycles are perfectly periodic","Confusing correlation with cyclic causation","Fatigue from repeated cycles in materials"]},"interfaces":{"applicability":"required","items":["Standards for lifecycle management","Engine cycle testing standards","No regulation of the concept"]},"context":{"applicability":"required","items":["Repeating processes returning to a start state.","astronomical and geological cycles","physical cycles such as freeze-thaw and thermodynamic cycles","biological and biochemical cycles","engineering operating cycles","organisational lifecycles and research cycles"]}},"sources":[{"title":"Wikidata item Q2692606: cyclic process","url":"https://www.wikidata.org/wiki/Q2692606","note":"identity and sense of the item"},{"title":"Wikipedia (nl): Kringloop","url":"https://nl.wikipedia.org/wiki/Kringloop","note":"general description of the item"}],"openQuestions":["Should each cycle type be a separate entry?","How should modelling resources be linked?","How should lifecycle standards be linked?"],"resources":{"spec":"/models/things/publications/thing-q2692606/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q2692606/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T00:11:08Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"not-applicable","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-08T19:09:52+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane ACT: no invented physical properties."},"score":1.0}}