1. A managing apparatus for managing a software development and maintenance system, the managing apparatus comprising: a construct memory configured to store a set of constructs, each construct of the set of constructs being an element of a software code base of a software system; an issue memory configured to store a set of issues, each issue of the set of issues specifying an implementation of software feature or an architectural concern of the software code base; a vector generating device configured to establish a set of vectors, wherein each vector of the set of vectors specifies a dependency between the stored set of constructs and at least one issue of the stored set of issues; a computing device configured to compute a statistical value using the established set of vectors; and a determining device configured to determine a degree of interdependence between the set of issues using the computed statistical value.