Here is what I wrote for our purpose:
Compatibility testing is all pre-transfusion testing performed on a potential transfusion recipient and the appropriate donor blood, in an attempt to ensure that the product will survive in the recipient and induce improvement in the patient’s clinical condition; the electronic crossmatch is performed with the ABO compatibility truth tables built in a computer system.
The electronic verification of donor/recipient compatibility has many advantages. In addition to the major benefits of increased patient safety and decreased unnecessary work, the electronic crossmatch has advantages that include time savings, job simplification, increased throughput, decreased turnaround time, reduced patient sample requirements, and reduced handling of potentially hazardous samples, as well a avoidance of false-positive and false negative reactions associated with serological crossmatches.