Your hotel tech stack is only as strong as the intergrations between it
For modern hotels, effective integration of hotel systems is critical, with everything working together when it is needed.
By Mervyn Jackson, IT-ICU
Hotels increasingly rely on a collection of specialised systems to keep everyday operations moving.
A property management system may hold the reservation. A booking engine accepts direct bookings. Channel management software distributes room availability. Payment systems process transactions. Revenue management tools adjust pricing. Guest messaging platforms send confirmations and updates. Housekeeping systems track room status, while access control systems may determine whether a guest can enter the room.
Each system can work perfectly well on its own. The operational problem often appears in the connections between them.
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When ‘online’ does not mean ‘working’
Technology failures are easy to recognise when a system is completely unavailable. A server goes offline, a website stops loading or a workstation will not start.
Integration problems can be much less obvious.
Two systems may both be online and functioning normally while the information that should move between them has stopped moving.
A reservation may appear correctly in one platform but fail to reach another. A room-status change may not update where expected. Payment information may not reconcile correctly. A guest detail may remain current in one system but outdated somewhere else.
From the perspective of each individual supplier, their platform may still be working. For the hotel, however, the overall process is not.
That distinction matters because modern hotel operations increasingly depend on chains of systems rather than isolated applications.
Understand what talks to what
One of the most useful exercises for any accommodation operator is simply to document which systems exchange information with each other.
This does not need to become a complicated technical diagram. Start with the important operational processes and follow the information.
For example, when a booking is made, where does it begin? Which systems receive the reservation? Where is availability updated? Which platform handles payment? What information is sent to the guest? Does anything need to reach housekeeping, access control or another operational system?
The same exercise can be performed for cancellations, room changes, refunds and other common events.
The goal is to understand the complete process rather than viewing every application separately.
Once those relationships are visible, it becomes much easier to identify where a failure could interrupt operations.
Document the hidden dependencies
Integrations themselves may depend on things that receive very little attention while everything is working.
An automated connection might rely on an API credential, service account, authentication token, subscription, connector or configuration created years earlier.
The person who originally set it up may no longer work at the property. The hotel may know which systems it uses without necessarily knowing what allows those systems to communicate. Basic integration records can therefore be extremely valuable.
For each important connection, operators should know what information moves between the systems, who supports each side of the connection, who has administrative control and what the first escalation path is if information stops flowing.
Credentials themselves should be protected appropriately rather than stored casually in documentation, but authorised personnel should know how access can be recovered when required.
Know which system is authoritative
When two systems disagree, staff need to know which one should be treated as the authoritative source.
If one platform shows a booking and another does not, which record is correct? If room status differs between systems, where should staff make the correction? If an integration is temporarily unavailable and information is entered manually, which system should ultimately be updated once normal operation returns?
These questions are much easier to answer before an incident.
Without a clear source of truth, well-intentioned staff may make changes in several places, creating additional inconsistencies that need to be resolved later.
Test the process, not just the software
A system being online does not prove the complete workflow is working. The better test is an end-to-end one.
If a controlled booking is created, does it appear everywhere it should? If it changes, do the connected systems receive the update? If it is cancelled, do availability and downstream records respond appropriately?
Similar tests can be useful after significant software changes, configuration changes or integration updates. They are especially important when a new supplier is introduced or an old one is removed.
Testing the complete business process can expose problems that individual system checks will miss.
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Plan for degraded operation
Hotels also need to consider what happens when an integration is temporarily unavailable.
Can front-desk staff identify that information is no longer synchronising? Is there a manual procedure that can be used temporarily? How will information entered during the outage be reconciled later? Who is responsible for checking that the systems agree again once the connection has been restored?
A fallback process does not need to replicate every feature of the normal technology environment.
Its purpose is to allow the property to continue operating safely and predictably until normal integration is restored.
Review old connections
Technology environments rarely remain static. Platforms are replaced. Staff change. Suppliers change. New tools are introduced and old systems are retired.
The integrations created along the way do not always disappear automatically.
Old service accounts, API access, connectors and supplier permissions can remain long after their original purpose has changed.
Periodic review is therefore useful not only for resilience but also for maintaining control over who and what can access important systems.
If an integration is no longer required, it should not simply be forgotten. If it is still required, someone should understand why it exists and who is responsible for it.
The connections are part of the system
Hotels naturally spend time selecting capable individual technology platforms. But operational reliability depends on more than whether each product performs its own function well.
The connections between those products have become part of the hotel’s operating environment. They need ownership, documentation, testing and review just like the systems themselves.
A hotel can have an excellent PMS, booking engine, payment platform and guest-communication system and still experience serious disruption if the information between them stops moving correctly.
The question is no longer only whether each system works. It is whether the entire chain works together when the hotel needs it.
