A national survey of juvenile probation officers revealed that they thought their optimal caseload was juveniles, while their actual caseload was juveniles.

...Though their optimal caseload was 30 juveniles, while the actual caseload was 41 juveniles.

Explanation:

According to A National Survey of Juvenile, probation officers reported that, the caseloads ranges between 2 and cover 200 cases. They further thought that they have an optimal caseloads of 30 juvenile, and the actual caseloads of 41 juvenile. In addition the report also indicated that, juvenile and adult caseloads were more in urban and and suburban than rural areas.

This survey was released in 1996.

concurrent jurisdiction is the ability to exercise judicial review by different courts at the same time, within the same territory, and over the same subject matter. for instance, a domestic violence matter may be heard in either a general civil court or a family court in the same county. whichever court actually exercises its jurisdiction first will do so exclusively.

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.