{
  "schema_version": "1.0",
  "rubrics": [
    {
      "id": "R1",
      "requirement": "The model shall include a PISTON part with outside diameter 85 and overall height 90."
    },
    {
      "id": "R2",
      "requirement": "The PISTON shall have three ring grooves 4.3 wide with a root diameter of 79."
    },
    {
      "id": "R3",
      "requirement": "The PISTON shall have a transverse pin bore of diameter 33.8 and an internal cavity of diameter 76."
    },
    {
      "id": "R4",
      "requirement": "The PISTON crown shall be domed with radius 120."
    },
    {
      "id": "R5",
      "requirement": "The model shall include a CRANKSHAFT part with a rear flange of diameter 144 and thickness 10."
    },
    {
      "id": "R6",
      "requirement": "The CRANKSHAFT flange shall carry 8 holes of diameter 10 on a 100 diameter bolt circle."
    },
    {
      "id": "R7",
      "requirement": "The CRANKSHAFT shall have main journals of diameter 72 and a front nose of diameter 32 and length 80."
    },
    {
      "id": "R8",
      "requirement": "The CRANKSHAFT shall have four crankpins of diameter 54 offset 44 from the main axis, separated by webs 15 thick."
    },
    {
      "id": "R9",
      "requirement": "The model shall include a CONNECTING_ROD_CAP part 94 wide, 60 high and 38 thick, with a half-bore of radius 27."
    },
    {
      "id": "R10",
      "requirement": "The CONNECTING_ROD_CAP shall have two bolt holes of diameter 9 at 76 centres."
    },
    {
      "id": "R11",
      "requirement": "The model shall include a CONNECTING_ROD part whose small-end bore is diameter 33.8."
    },
    {
      "id": "R12",
      "requirement": "The model shall include a PISTON_PIN part of diameter 33.8 and length 82."
    },
    {
      "id": "R13",
      "requirement": "The model shall include a PISTON_RING part with outside diameter 85, inside diameter 79 and thickness 4.3."
    },
    {
      "id": "R14",
      "requirement": "The model shall position each connecting rod big end concentric with a crankpin, with the cap closed around it."
    },
    {
      "id": "R15",
      "requirement": "The model shall seat each piston pin through its piston and the connecting rod small end."
    },
    {
      "id": "R16",
      "requirement": "The model shall contain a MINI_ASSEMBLY product grouping one piston, three piston rings, one piston pin, one connecting rod and one connecting rod cap."
    },
    {
      "id": "R17",
      "requirement": "The model shall contain a top-level 4_CYLINDER_ENGINE_ASSEMBLY product holding one CRANKSHAFT and four MINI_ASSEMBLY instances."
    },
    {
      "id": "R18",
      "requirement": "The model's product structure shall total 4 pistons, 4 connecting rods, 1 crankshaft, 4 connecting rod caps, 12 piston rings and 4 piston pins."
    }
  ]
}