Business Process Testing (BPT) is Mercury’s tool and concept which allows inexperienced automaters to easily create automation test scripts by piecing together reusable business components.
Components are a group of test steps that can be used in multiple test cases as well as in the same test case.
Components are seen in QC as icons (that look like pieces from a jig saw puzzle) but they contain QTP code.
In general, each screen/page in the AUT (Application Under Test) will have just one component created for it.