Computing system and method for controlling the execution of a decision process to maintain the data access efficiency upon receipt of an availability information inquiry

[0036]FIGS. 1 and 2 give an example of a first embodiment of the invention. In the embodiment, a polling error rate of an inventory source is monitored and utilized to drive a decision process on how to use the inventory source. Further embodiments of the invention are depicted in FIG. 3 through 6. The embodiments can be combined with each other.

[0037]FIG. 1 is an example of an architecture block diagram of an availability inquiry system 10 according to the present invention. In the present embodiment, after receiving a computation inquiry, which is here an availability request r1, the availability inquiry system 10 can dynamically choose one from at least two data sources and retrieve the corresponding data from the chosen data source by applying a data source adaptation method to compute a decision rule. The data source adaptation method requires a polling error rate of an inventory source as an input data. The polling error rate represents a ratio between a number of access failures