The purpose of this study is to examine to what extent there is a discrepancy between the formal guiding documents and the employees experiences of the activity at Kronobergshäktet. Furthermore, is it possible that any discrepancy could be explained by institutional imbalance? My main theories are normative institutionalism and a modified type of institutional analysis. The model consists of three parts –values (a common value-system), rules and practice (the unpredictable reality) and it assumes a reciprocal relationship between them. In order to examine this I have used qualitative methods in form of interviews combined with an analysis of content. The normative institutionalism presupposes that the actors follow a logic of appropriateness in the interest of both the institution and the actor. According to the respondents, their performance is restrained by the influence from practice. I found that the respondents in their work can’t apply the common value-system in favour of the unpredictable practice. This means that the people detained do not receive the care they are entitled to in times of overcrowdment. Remarkable as it is, the respondents are well aware of what causes the problem; the overloaded custody and the influence from the unpredictable practice. The conclusion is that in times of overcrowded departments the custody is governed neither by rules or values but by practice.