{
  "schema_version": "1.0",
  "rubrics": [
    {
      "id": "R1",
      "requirement": "The model shall have an overall length of 100 mm along the shaft axis."
    },
    {
      "id": "R2",
      "requirement": "The model shall have a maximum diameter of 40 mm at the gear teeth tips."
    },
    {
      "id": "R3",
      "requirement": "The model shall include an integral spur gear with 20 teeth."
    },
    {
      "id": "R4",
      "requirement": "The model shall include a stepped shaft with a collar on each side of the gear and a reduced-diameter journal at the left end."
    },
    {
      "id": "R5",
      "requirement": "The model shall include a pair of opposed wrench flats at the right-hand end of the shank."
    },
    {
      "id": "R6",
      "requirement": "The model shall include an axial centre hole in the right-hand end face."
    },
    {
      "id": "R7",
      "requirement": "The model shall include concave fillets blending the gear faces into the adjacent collars."
    },
    {
      "id": "R8",
      "requirement": "The model shall include an R11.5 (Ø23) circular feature."
    },
    {
      "id": "R9",
      "requirement": "The drawing shall contain a side view, an end view and an isometric view of the shaft."
    },
    {
      "id": "R10",
      "requirement": "The drawing shall dimension the 100 overall length and the 40 overall diameter."
    },
    {
      "id": "R11",
      "requirement": "The drawing shall dimension the Ø23 (R11.5) circle on the end view."
    },
    {
      "id": "R12",
      "requirement": "The drawing shall have a title block with a title, a drawing number, size A3 and scale 1:1, and state that dimensions are in millimetres."
    },
    {
      "id": "R13",
      "requirement": "The drawing shall indicate third angle projection."
    },
    {
      "id": "R14",
      "requirement": "The model shall be saved as Stepped_Gear_Shaft.prt containing exactly one solid body."
    },
    {
      "id": "R15",
      "requirement": "The drawing shall be saved as Stepped_Gear_Shaft_dwg1.prt referencing the shaft part."
    },
    {
      "id": "R16",
      "requirement": "The model shall use millimetres as its units."
    }
  ]
}