{
  "job": "OFFICE-FITOUT-01 · layout change proposal for an existing office floor (synthetic)",
  "decision": "With 80 staff and a 60 % peak attendance (hybrid work), does replacing fixed desks with shared desks plus more meeting rooms and phone booths change peak-day desk shortage and meeting-room waiting, and how?",
  "floor": {
    "size": "30 × 20 m, one level, 600 m²",
    "fixed": [
      "Service core along the east edge (x 25–30 m): lift lobby, two lifts, WC block, main stair, plant room; the single tenant entrance is a 1.4 m double door at x = 25 m, z 9.3–10.7 m.",
      "West fire-escape stair enclosure (x 0.25–3.2 m, z 7.9–12.1 m) with a 1.4 m door onto the escape route.",
      "Escape route 1.5 m wide between the two doors (z 9.25–10.75 m, x 3.2–25 m): kept clear in every option (check_space passageTags escape, passageClearance 1.5).",
      "Four free-standing 500 × 500 columns at (10, 5), (17.5, 5), (10, 15), (17.5, 15) m; a 7.5 m grid from the core with a 10 m end bay.",
      "Glazed north and south facades (ten 2.2 m panels each on a 0.8 m sill) with a 1.0 m furniture-free strip inside them."
    ]
  },
  "options": {
    "A": "Today: 80 fixed desks in eight 10-desk bench clusters, boardroom (8), meeting room (6), director's office, reception by the entrance, pantry, print and storage.",
    "B": "Proposal: 54 shared desks (0.675 desks per person) in nine 6-desk clusters, meeting room L (10), M1 (8), M2 (8), S1–S3 (4), six phone booths, a 3-seat focus bay and a 4-seat focus library, reception, pantry with print point.",
    "R02": "Client revision on B: keep one director's office (M2 becomes it, with a desk, visitor chairs, a round table and a credenza) and move reception from the south-east bay to the north-east bay beside the entrance; the three north-east focus desks take the south-east bay."
  },
  "simulation": {
    "attendance": "Poisson arrivals 07:30–12:00 at 6, 20, 14 and 5.33 per hour: mean 48 = 60 % of 80; the same arrival stream per seed in every option.",
    "day": "6–8 work blocks (triangular 20/35/55 min); after each block: 7 % book a room (organiser), 23 % attend a meeting (walk to a room, no booking), 30 % phone call (5–15 min), 12 % focus block (45–90 min), 28 % stay.",
    "meetings": "55 % small (2–4, 20–40 min), 30 % medium (5–8, 30–60 min), 15 % large (9–10, 45–90 min); a booking takes the nearest free room that fits (A: large meetings squeeze into the boardroom).",
    "desks": "Assigned on arrival from the free desks (lifecycle resource free → taken); held for the day; with none free the person waits first come first served.",
    "booths": "Nearest free booth; after a 5 min wait the call is taken at the desk. A has no booths: all calls at the desk.",
    "focus": "Nearest free quiet seat; if it is taken when the person arrives the block happens at the desk. A has no quiet seats.",
    "window": "07:00–21:00 (50,400 s); seeds 20261012–20261031 (20); maxEvents 100,000 per run; walking 1.2 m/s, radius 0.3 m, height 1.7 m."
  },
  "outOfScope": [
    "Real attendance or booking data; building-code, fire-code or accessibility compliance; lighting, HVAC, acoustics; furniture products and prices.",
    "Attendees do not book rooms and may stand in a room booked by another meeting; no mutual avoidance or turning; waiting agents may share a point."
  ],
  "outputs": "English only: native project with design options A/B/R02 and process options/comparisons, A3 (1:150) and A2 (1:100) dimensioned sheets, A2 diff sheets, issued sets P1/P2, 3D and 2D pictures, quantity schedule, proposal report (HTML/PDF), per-seed results."
}