EMS HandbookUnderstand EMS fast. Verify it when it matters.

One product model, several ways in. Start from what you are trying to understand or do, then drill into the exact rule and evidence only when you need it.

Learn EMS through one booking

Troubleshoot a customer issue

Build the mental model

What EMS is, who uses it, and where the work happens.

Follow a workflow

See the user goal, prerequisites, steps, done-state, and failure paths.

Start from the symptom

What the customer sees → likely explanation → exact rule.

Answer “can EMS do this?”

Supported, supported with caveat, fixed behaviour, or not established.

The product in one picture

Vendor sets up experience · price · availability
→ Guest or partner sells direct · hotel · marketplace
→ EMS runs the booking status · payment · invoice · operations

Go by product area

Bookings & statuses — What state is this booking really in?
Money — Price, tax, fees, commission, vendor income.
Availability — What guests see, capacity, approval, acceptance.
Partners — Routes, ownership, and system boundaries.

Trust model: Code evidence ≠ reproduced behaviour ≠ intended behaviour. See how verification works.