{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/engineering.uncertainty.tur.input.json",
  "title": "Test uncertainty ratio TUR — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "U": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Already-expanded measurement uncertainty U > 0."
    },
    "lsl": {
      "type": "number",
      "description": "Lower specification limit. Provide with usl, or use T or tol instead."
    },
    "usl": {
      "type": "number",
      "description": "Upper specification limit. Must be greater than lsl."
    },
    "T": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Specification interval width (span). Alias: span. Do not combine with lsl+usl or tol."
    },
    "span": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Alias for T."
    },
    "tol": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Half-width; span = 2·tol. Do not combine with lsl+usl or T."
    }
  },
  "required": [
    "U"
  ],
  "description": "Two-sided TUR = (USL−LSL)/(2U) from an already-expanded U (ANSI/NCSL Z540.3). Spec via lsl+usl, T, or half-width tol. Not pass/fail, not guard band, and not combined RSS. (calculation_version 1.0.0)"
}