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Home > Interfaces > OTA / HTNG > OTA / HTNG Inventory Requirements


 It is the responsibility of hotel management to ensure that PMS room type availability is managed correctly. If room types are not managed correctly, online availability can become inaccurate and overbookings can occur.

 

Many CRSs do not allow negative availability. When a room type is overbooked in the PMS (for example, -2), the CRS does not recognize that you are overbooked. Instead, it treats that value as 0.

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This creates a problem because the CRS still counts all other room types normally. It does not reduce availability to account for the overbooking.

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As a result, the CRS may show rooms as available online even though the hotel is already full or overbooked.

In simple terms:

  • Negative availability is ignored and treated as 0
  • Positive availability is still counted normally
  • The total availability shown online can be higher than what actually exists

The CRS does not know you are overbooked — it only sees what you send from the PMS.

 

Scenario 1

 

In the PMS:

SGL=1
DBL=1
TPL=-3

 

The CRS will see this as:

SGL=1
DBL=1
TPL=0

 

This gives the CRS a total availability of 2 rooms, even though the hotel is actually overbooked by 1 room.

Scenario 2

 

In the PMS:

SGL=2
DBL=1
TPL=-2

 

The CRS will see this as:

SGL=2
DBL=1
TPL=0

 

This gives the CRS a total availability of 3 rooms, even though the hotel’s true availability is only 1 room.

 

To reduce these problems, the following adjustments are applied when availability is uploaded to the CRS:

 

Adjustment 1

If the total availability across all room types for a date is 0 or less, all room types will be sent to the CRS as 0 available for that date.

 

Adjustment 2

If the total availability is greater than 0, but one or more room types are overbooked, the overbooked amount will be deducted from room types with a positive count.

The deduction starts with the room type that has the lowest positive availability and continues upward until the total sent to the CRS matches the true total availability in the PMS.

 

In this example, the PMS shows:

SGL=2
DBL=1
TPL=-2

 

When this adjustment is made, 1 room is deducted from DBL first, then 1 room is deducted from SGL. The final availability sent to the CRS becomes:

SGL=1
DBL=0
TPL=0

 

These adjustments are intended to prevent incorrect availability from being sent online. They do not correct the underlying room assignment problem in the PMS.

 

If the results are not what you expect, room type assignments in the PMS should be reviewed and corrected. The more room types are left overbooked or misassigned, the greater the risk of inaccurate online availability and overbookings.





Article ID
 ota___htng_inventory_requirements
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Last Modified
 4/20/2026 3:29 PM