Recognizing objects in QTP

QTP first recognizes the objects using the test object's default properties. these properties are also called as mandatory properties. If these properties are not sufficient , then assistive properties are added until a unique description is compiled. If incase no assistive properties are available, then QTP adds a special 'Ordinal Identifier'. this ordinal identifier depends on any of the 3 values: Location, Index or Creation Time. To add mandatory properties or assistive properties or to select ordinal identifier all you have to do is go to Tools-->Object Identification