1. A process of updating a status of relation between objects in a system of computer-aided design, for subsequent analysis of status of relation, comprising: (a) identifying: a set of data of a group of objects, preferably a pair of objects; a method of computation of relations between objects; and an expected relation of executing the method identified using said set of data; (b) executing the method using the set of data to compute a relation; (c) comparing the expected relation with the computed relation; and (d) updating a status of the expected relation based on a result of the comparing step.