In a computerized method for adherence to physical restrictions in the construction of an ITE hearing aid, each component to be placed in the shell of the hearing aid has a collision plot associated therewith. The collision plot is generated as a scatter plot by measurement and simulation, and represents the physical extent of the influence of a particular property of the component on other components. When virtual representations of the respective components are moved relative to another in the e-detailing software for determining the physical positions of the components in the ITE hearing aid, the collision plot for a given component is visually displayed, so that it can easily be seen when another component invades that collision plot, thereby representing an unacceptably close relative position of the two components.