{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://schemas.openplantfloor.org/standard/process-timing.schema.json",
  "version": "0.1.0",
  "title": "Process timing",
  "description": "How long an operation takes on a machine: cycle time per unit at a low, base and high case, setup and changeover, with the evidence grade and source of each figure. Timing is what a takt plan and a simulation read; as measured figures replace estimates, the grade rises.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "$schema",
    "timingId",
    "equipmentRef",
    "process",
    "unit",
    "cycleSeconds",
    "evidence"
  ],
  "properties": {
    "$schema": {
      "const": "https://schemas.openplantfloor.org/standard/process-timing.schema.json"
    },
    "timingId": {
      "$ref": "https://schemas.openplantfloor.org/standard/common.schema.json#/definitions/identifier"
    },
    "equipmentRef": {
      "allOf": [
        {
          "$ref": "https://schemas.openplantfloor.org/standard/common.schema.json#/definitions/identifier"
        }
      ],
      "description": "The equipment-capability record the timing is for."
    },
    "process": {
      "$ref": "https://schemas.openplantfloor.org/standard/common.schema.json#/definitions/process"
    },
    "operation": {
      "type": "string",
      "description": "The operation within the process, for example cut-to-length or bend-90."
    },
    "unit": {
      "type": "string",
      "minLength": 1,
      "description": "What one cycle produces: part, kit, lot, m."
    },
    "unitsPerCycle": {
      "type": "number",
      "exclusiveMinimum": 0,
      "default": 1
    },
    "cycleSeconds": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "base"
      ],
      "properties": {
        "low": {
          "type": "number",
          "minimum": 0
        },
        "base": {
          "type": "number",
          "minimum": 0
        },
        "high": {
          "type": "number",
          "minimum": 0
        }
      }
    },
    "setupSeconds": {
      "type": "number",
      "minimum": 0
    },
    "changeoverSeconds": {
      "type": "number",
      "minimum": 0
    },
    "conditions": {
      "type": "array",
      "items": {
        "$ref": "https://schemas.openplantfloor.org/standard/common.schema.json#/definitions/parameter"
      },
      "description": "The work the figure holds for, for example material and thickness."
    },
    "evidence": {
      "$ref": "https://schemas.openplantfloor.org/standard/common.schema.json#/definitions/evidence"
    },
    "sources": {
      "type": "array",
      "items": {
        "$ref": "https://schemas.openplantfloor.org/standard/common.schema.json#/definitions/source"
      }
    },
    "notes": {
      "type": "string"
    }
  }
}