In ABA-based interventions, a method of combining simple, component behaviors into a more complex, composite behavior. In forward chaining, the child is taught the first step in a complex behavior and is then guided through all of the remaining steps. As he becomes successful with the first step, the teacher begins to teach him the second step. When the child is doing the first to steps independently, he's taught the third, and so on until the child is able to sequence the entire behavior independently. See also backward chaining and task analysis.

An inferencing technique related to event detection, in which G2 invokes certain rules whose antecedent refers to a variable or parameter that has received a new value. Contrast with backward chaining.

In an expert system, starting with data and trying to draw all possible conclusions from the data.