Boston University · Event digital twin

RhettBooked

Describe your BU event in one sentence. Get a plan that holds up.

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02The problem

A dozen unknowns
in a dozen places.

?

Which room fits?

Capacity, AV, access, and availability live in different systems.

?

How many actually show up?

RSVPs are not attendance. The gap swings budgets.

?

What does it truly cost?

Food, staff, rentals, and hidden in-kind resources.

?

How does everyone get home?

…if the Green Line's down at 10pm.

03What it does

One sentence in.
A plan out.

VenueTurnoutFood & WaterGetting TherePeopleBudgetDrill

Lean

Essentials only

Venue
Turnout
Food & Water
Getting There
People
Budget

Balanced

Recommended

The sensible default

Venue
Turnout
Food & Water
Getting There
People
Budget

Premium

Every upgrade on

Venue
Turnout
Food & Water
Getting There
People
Budget
04A real test case

Arab student clubs from across Boston.
One live Family Feud tournament.

ILLUSTRATIVE · SAMPLE BRIEF, NOT A BOOKED EVENT
~350
people
$10,000
budget
Early Nov
date window
Multi-campus
Harvard · MIT · BC · …
Game show
live Family Feud
→
VenueA room that fits 350
TurnoutA band, not a guess
BudgetPlans that fit $10k
Getting thereCross-campus transit
DrillA stress test before the night
05Data Science I

A mobility-fitted arrival curve
beats a flat baseline.

Mobility-fittedFlat baselineHeld-out arrivals
~0.0×
more accurate on data it never saw.
RMSE
0.000
vs 0.499 flat
Rank correlation
0.000
vs 0.006 flat
Holdout test: fit on the first half of the month, tested on the unseen second half.
06Monte Carlo + models

Every headline is a distribution,
not a point.

p90p50p10
TurnoutBeta prior × 500 draws
Budget500 draws over cost ranges
Room assignmentOR-Tools CP-SAT constraint solver
Judge matchingTF-IDF + cosine
07The data

Real sources.
Real counts.

Bluebikes trips
0→0
within 600m of BU — our mobility proxy for arrivals
Numina rows
0
OpenAlex authors
0
Transit
MBTA GTFS
Geography
OpenStreetMap
Datasets we built ourselves

Fetch-and-aggregate pipelines, plus a curated BU reference set of buildings, rooms, dining, and parking.

08Agentic system

A research agent
with guardrails.

Finds caterers, judges, and sponsors — inside a fence.
  • Tool allowlist
  • Call & time caps
  • No source, no result
  • OpenStreetMap cross-check
  • Privacy scrubber
  • Web content is data (injection-safe)
  • Exposed as an MCP server
HONEST FALLBACK

When the API hit its quota, it showed curated real caterers with real links.

Never fabricated data.

09Works anywhere

Online, offline,
or over quota.

1

Live integrations

Gemini · OpenAlex · MBTA · OpenStreetMap — all cached, all with fallback.

2

Responsible scraping

Public endpoints, polite pooling, 24h cache.

3

Fully offline

Runs with no API key at all.

10Digital-twin drill

Find the first failure
— and when.

Stress-tests power, occupancy, and getting home.
69readiness
Scenario

Green Line closure + fare-free Route 57 shuttle

● Failing · 69→● Strained · 84
11Design & trust

Provenance labels are a UI feature,
not a footnote.

WIREFRAMED IN FIGMA, THEN BUILT IN REACT
rhettbooked — plan
Lean
MEASURED
SIMULATED
ASSUMED
Balanced
MEASURED
SIMULATED
ASSUMED
Premium
MEASURED
SIMULATED
ASSUMED
Headcount
Budget
Food level
Status as colour and text · light/dark · keyboard-friendly

12 — ETHICS

Trust by construction.

Enforced in code, not promised in a disclaimer.

  1. 01

    Every number labelled & sourced

    MEASURED · ASSUMED · PLACEHOLDER · SIMULATED · RESEARCHED

  2. 02

    Privacy

    Data scrubbed, kept only as aggregate counts, groups under 5 suppressed, HMAC tokens + separate vault.

  3. 03

    People, fairly

    Recommended via public scholarly info only. No contact scraping, no demographic inference.

  4. 04

    Honest AI

    The LLM never invents numbers. Caveats are shown.

  5. 05

    Realistic cost

    BU in-kind resources shown as $0 — and labelled.

13Impact
Reusable for any BU eventExtensible to other campuses
0
backend tests
0
frontend tests
Clean
build
rhettbooked.vercel.app
live

One sentence in. A plan that holds up — and tells you how much to trust it.

Try Brief A & Brief B