A computer does what someone tells it to do. The key here is going to be the instructions that will go into the automated decision-making system. Too much detail will cause error. Creaming off the easy decisions using profiling and to put it plainly a set of common-sense instructions, should facilitate decision making.
Will there be a need for a type of ombudsperson or a type of secondary review by senior officers? Yes, there has to be that human element to deal with decisions that do not come under the primary automated scheme.