{"uid":"cap_O11I7lXMLP6eGqUlUBYfl","slug":"energybilltoolkit-co-uk-8b7432e1","name":"M2M Trust Process Capability Analysis (Cp/Cpk/Ppk)","description":"M2M Trust deterministic analysis tool: Cp/Cpk/Ppk-style capability analysis for numeric sample data.","url":"https://energybilltoolkit.co.uk/m2m-trust/api/tools/process-capability","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"context":{"type":"string","description":"Short domain context for interpretation."},"samples":{"type":"array","items":{"type":"number"},"minItems":2,"description":"Numeric process samples."},"subgroup_size":{"type":["integer","null"],"minimum":2,"description":"Optional subgroup size for within-subgroup variation."},"lower_spec_limit":{"type":"number","description":"Lower specification limit."},"upper_spec_limit":{"type":"number","description":"Upper specification limit."}}},"responseSchema":null,"example":{"request":{"input":{"body":{"context":"Manufacturing process quality control","samples":[12.1,12.4,11.9,12.3,12,11.8,12.2,12.5,11.7,12.1,12.4,11.9,12.3,12,11.8,12.2,12.5,11.7,12.1,12.4,11.9,12.3,12,11.8,12.2,12.5,11.7,12.1,12.4,11.9],"lower_spec_limit":11.5,"upper_spec_limit":13},"type":"http","method":"POST","bodyType":"json"}},"response":{"status":"Not-Capable","verdict":"Process does not appear capable against the supplied specification limits.","metadata":{"mean":12.103333,"context":"Manufacturing process quality control","metrics":{"cp":0.969165,"cpk":0.77964,"ppk":0.792968},"sample_count":30,"within_sigma":0.257954,"overall_sigma":0.253618,"subgroup_size":null},"confidence":0.95}},"exampleRequest":{"context":"Manufacturing process quality control","samples":[12.1,12.4,11.9,12.3,12,11.8,12.2,12.5,11.7,12.1,12.4,11.9,12.3,12,11.8,12.2,12.5,11.7,12.1,12.4,11.9,12.3,12,11.8,12.2,12.5,11.7,12.1,12.4,11.9],"lower_spec_limit":11.5,"upper_spec_limit":13},"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_TN79YQP84WE82CnURgVbk","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes Cp, Cpk, and Ppk-style process capability indices for a supplied set of numeric sample data against specification limits.","exampleAgentPrompt":"Run a Cp/Cpk/Ppk capability analysis on these 30 measurements: [12.1, 12.4, 11.9, ...] with a lower spec limit of 11.5 and an upper spec limit of 13.0 — I need to know if this process is capable.","exampleUseCases":null,"resultDescription":"Returns deterministic Cp, Cpk, and Ppk capability indices along with supporting statistics such as mean, standard deviation, and sigma level, indicating whether the process is capable relative to the supplied specification limits.","failureModes":["Insufficient sample size returns an error or unreliable indices","Missing or invalid specification limits cause computation failure","Non-numeric values in sample data trigger a validation error","Lower spec limit greater than or equal to upper spec limit causes rejection","Empty data array returns an error response"],"whenToPreferThis":"Use this endpoint when you need deterministic, reproducible Cp/Cpk/Ppk-style process capability indices computed from raw numeric sample data against defined specification limits — particularly in quality engineering, Six Sigma, or SPC workflows where auditability and consistency matter. Prefer this over probabilistic or ML-based tools when exact mathematical repeatability is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:30:43.502Z","isFirstParty":false}