{
  "schemaVersion": 1,
  "study": "cold-email-follow-up-timing-study",
  "title": "Follow-up timing experiment: study protocol",
  "status": "awaiting-real-data",
  "scope": "Collection template, not a dataset or completed field study. All null values are intentionally uncollected.",
  "unitOfObservation": "prospect",
  "requiredInputs": "Eligible contacts, a reviewed sending policy and a frozen outcome definition.",
  "controls": "Assign once within segment and mailbox strata; same text and outcome window, different delay.",
  "primaryAnalysis": "Qualified replies per assigned eligible prospect after both arms mature.",
  "registration": {
    "owner": null,
    "protocolVersion": "1",
    "registeredAt": null,
    "population": null,
    "eligibilityRules": null,
    "primaryOutcomeDefinition": null,
    "denominator": null,
    "observationWindow": null,
    "targetSampleAndJustification": null,
    "assignmentProcedureAndSeed": null,
    "exclusionRules": null,
    "safetyStopConditions": null,
    "missingDataPolicy": null,
    "retentionAndAccessOwner": null
  },
  "collectionRules": [
    "Assign pseudonymous IDs; do not store mailbox passwords, access tokens or unnecessary identifiers.",
    "Freeze the outcome and exclusions before collection; retain exclusions with reasons.",
    "Do not use repeated observations as independent people. Record clustering by person, company or mailbox.",
    "Do not treat a software test, simulated reply or researcher-written example as participant or campaign evidence.",
    "Record complaints and opt-outs and follow the actual suppression workflow.",
    "For interviews obtain permission before recording and respect withdrawal.",
    "Publish aggregate or redacted evidence only after review; keep original private records outside the public website."
  ],
  "fieldDictionary": {
    "assignment_id": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "assignment id",
      "missingValue": null
    },
    "company_id": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "company id",
      "missingValue": null
    },
    "segment": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "segment",
      "missingValue": null
    },
    "mailbox_id": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "mailbox id",
      "missingValue": null
    },
    "arm": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "arm",
      "missingValue": null
    },
    "delay_policy": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "delay policy",
      "missingValue": null
    },
    "assigned_at": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "assigned at",
      "missingValue": null
    },
    "cutoff_at": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "cutoff at",
      "missingValue": null
    },
    "qualified_reply": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "qualified reply",
      "missingValue": null
    },
    "complaint": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "complaint",
      "missingValue": null
    },
    "optout": {
      "required": true,
      "type": "string, number or boolean as specified by the registered protocol; null until collected",
      "meaning": "optout",
      "missingValue": null
    }
  },
  "blankRecord": {
    "observation_id": null,
    "assignment_id": null,
    "company_id": null,
    "segment": null,
    "mailbox_id": null,
    "arm": null,
    "delay_policy": null,
    "assigned_at": null,
    "cutoff_at": null,
    "qualified_reply": null,
    "complaint": null,
    "optout": null,
    "excluded": false,
    "exclusion_reason": null,
    "protocol_deviation": null
  },
  "records": [],
  "analysisStatus": "not-run",
  "results": null,
  "interpretationLimits": "Do not repeatedly peek and stop at a favorable difference. Predefine sample needs, safety stops and analysis. Publish results only after the evidence, method and limitations have been reviewed. This protocol provides no benchmark, expected lift or completed-study claim.",
  "procedure": [
    "Specify delays, weekday policy, timezone, message text and an outcome window long enough for both schedules.",
    "Randomize eligible contacts within comparable segments. Keep mailbox allocation balanced and stop both arms after replies or opt-outs.",
    "Before collection, write the primary outcome, observation window, exclusion rules and stopping conditions. Preserve excluded observations with a reason rather than quietly removing them.",
    "Pilot the procedure with fictional or owned test data, resolve ambiguous fields, and freeze a dated protocol version before the main run."
  ],
  "interviewPrompts": []
}