Appointment booking system requirements template (free SRS download)

Short answer: An appointment booking system requirements document (SRS) describes, on one page, who books what, how slots are calculated, what staff can change, which reminders go out, and what "done" means for each flow. Download the free template below, fill in the six sections, and give it to any developer or AI agent to build from.

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How to fill each section

1. Problem

One or two sentences: what goes wrong today, and what it costs. Example prompt: "How do people book now, and what goes wrong?"

2. Users and roles

List every type of user and what each can do. Booking systems almost always have at least three: the person booking, staff who manage the calendar, and an admin who sets up services and hours.

3. Must-have flows (up to five)

Write each flow as "who does what, and what happens". Keep nice-to-haves (loyalty points, waitlists, payments) for a later version unless they're essential.

4. Data

The things the system stores: providers, services (with duration and buffer time), opening hours, bookings, customers, holidays/blocked time, reminders sent.

5. Rules and edge cases

This is where booking systems go wrong. Answer these:

• How long is each service, and is there a buffer between bookings?
• How far ahead can people book, and how late can they cancel?
• What happens to existing bookings when a provider blocks time?
• Which time zone is used, and what about daylight saving changes?
• Can two people book the same slot at the same moment? (It must be impossible.)

6. Done means

For each flow, the condition you'll test: "A patient can book a free slot, receives a confirmation email within one minute, and the slot disappears for everyone else."

Filled example: dental clinic

1. Problem: Reception takes bookings by phone; double bookings and no-shows cost the clinic several appointments a week.

2. Users and roles: Patient (books, reschedules, cancels own bookings) · Reception (manages the calendar, blocks time, books for patients, sees the daily list) · Clinic admin (manages dentists, services, opening hours).

3. Must-have flows:

1. Patient picks a dentist, service and free slot, and books with name, email and phone.
2. Patient gets a confirmation email and a reminder 24 hours before.
3. Patient reschedules or cancels up to 24 hours before.
4. Reception views the week, books for a patient, blocks a holiday, and sees today's list.
5. Admin adds a dentist, a service with duration, and opening hours.

4. Data: dentists, services (duration, buffer), opening hours, blocked time, bookings, patients, reminder log.

5. Rules: services 15 to 90 minutes with a 10-minute buffer; bookings up to 60 days ahead; no double booking of a dentist; clinic time zone for all times; blocking time over existing bookings asks reception to move them first.

6. Done means: each flow works on desktop and phone; double booking is impossible even with two simultaneous requests; reminders send at the right local time.

The prototype built from this example

We gave this exact example to Devfab: the Planner proposed a plan, it was reviewed and approved, and developer and QA agents built the prototype.

FAQ

What is an SRS for a booking system?

A software requirements specification: a document that says what the booking system must do, for whom, with which data and rules, and how you'll know it works. One page is enough for a small business.

What features should an appointment booking system have?

At minimum: online booking of free slots, confirmations and reminders, rescheduling and cancelling, a staff calendar with blocked time, and admin setup of providers, services and hours.

Can I use this template with any developer or tool?

Yes. It's tool-neutral. Developers, agencies and AI agents all build better from a clear one-page spec.

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