Case study · Travel technology
One source of truth for inventory, rates and availability.
Appnox engineered the reservation platform behind SimpleCRS — inventory and rate management, a booking engine, distribution connectivity and the operations console the team runs it from — so a property’s availability is decided in one place rather than reconciled across four.
The client problem
Every channel had its own idea of what was available.
Reservation estates tend to grow one integration at a time. Each addition brings its own rate logic and its own update cadence, and before long nobody can say with confidence what is bookable right now — which is how overbookings, stale rates and manual reconciliation become a daily routine.
Availability was maintained separately per channel, so the channels drifted apart.
Rate changes had to be applied by hand in more than one place, and sometimes were not.
Overbookings were discovered by a guest rather than prevented by the system.
Adding a new distribution partner meant a bespoke build every time.
Reporting had to be assembled by hand because no single system held the whole picture.
Nobody could safely change the pricing model, because the logic lived in several places at once.
What we built
A reservation core the rest of the estate answers to.
The centre of the work is a reservation core that owns inventory, rates and availability outright. Everything else — the booking engine, the distribution connectors, the operations console — reads from and writes to that core rather than keeping a private copy.
Rate and inventory management was rebuilt around rules rather than manual entry: seasons, derived rates, restrictions and yield adjustments expressed once and applied consistently, with a full history of what changed and who changed it.
Distribution was made a repeatable pattern rather than a bespoke project. Each connector maps an external partner onto the same internal contract, so the second integration costs meaningfully less than the first, and the tenth is routine.
- Single availability authorityOne system decides what is bookable, and every channel derives from it rather than maintaining its own view.
- Rule-based rate managementSeasons, derived rates, restrictions and adjustments defined once, applied everywhere, with an audit trail.
- Booking engineA direct booking path that shares the same inventory and pricing logic as every other channel.
- Repeatable distributionA common internal contract that new partner connectors map onto, so connectivity stops being a bespoke build.
- Operations consoleThe day-to-day view: reservations, exceptions, rate changes and the audit history behind them.
Operational effect
What changes when this work lands.
Ranges below describe what engagements of this shape typically move. They are Appnox delivery figures, not this client’s audited results — your own baseline is established before any commitment.
40–50%
fewer manual re-entries between systems
Typical range30–40%
less effort to add the next integration
Typical range25–35%
shorter first-response window on inbound enquiries
Typical range2–3×
more frequent releases after modernisation
Typical rangeIndicative ranges observed across comparable Appnox engagements. Not audited client results. Outcomes vary with scope, data quality and starting point.
How it was delivered
Core first, channels second.
Reservation work fails when connectivity is built before the thing it connects to is trustworthy.
01
Model the inventory truthfully
Establish what a unit, a rate and a restriction actually mean for this business before writing anything. Most reservation defects are modelling defects that surfaced late.
02
Build the core with history
Reservation systems are audited systems. Every state change is recorded from the first release rather than retrofitted when someone asks what happened.
03
One channel end to end
Take the direct booking path all the way through against the new core, so the contract is proven by something real before partners depend on it.
04
Make connectivity a pattern
Build the second connector as a template rather than a one-off, which is what makes the rest of the estate affordable.
05
Migrate with both running
Run old and new in parallel against live traffic, reconcile daily, and cut over only when the reconciliation is boring.
Before we talk
Questions this usually raises.
Connectivity is assessed per project against the access each partner permits, and we establish that before scope is agreed rather than after. We do not claim a certification or a partnership with any distribution provider, and any page that implied we did would be wrong.
Usually, yes — that is the more common shape. The reservation core becomes the availability authority and integrates with the property systems that already exist, rather than requiring them to be replaced first.
Handled by running both systems against live traffic and reconciling daily until the differences are explainable and small. A big-bang cutover on a reservation system is an avoidable risk, and we do not recommend one.
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Related work
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