In this work we introduce the notion of perspectile. This is meant to be a flexible and yet clear way of constructing entities by means of a definition. Whenever we define something we create it in the very specific context of its application. Even though this may seem quite simple and intuitive, to properly model this idea a big conceptual effort is required. As we shall see, perspectiles are useful in many domains. Here we try to show how they work with the problem of organizational identity, where the challenge is given by the fact that organizations change in every respect and there is no easy way of modeling a machinery to get them across time. Instead of either denying the evident fact that they change in every respect or surren- dering on its face, we try to get a picture of the conceptual grounds of this issue. Moreover, by facing this problem we will also draw some considerations about collective design.