Optimal mixed-model sequencing for balanced assembly lines

This paper describes an algorithm for solving optimally, the mixed-model sequencing problem when assembly line stations are balanced for each model. An optimal sequence is obtained with the minimization of the overall assembly line length for zero station idle time.The algorithm incorporates two basic steps. The first involves a search procedure that generates all cycle sequences; i.e. sequences having identical ‘start’ and ‘finish’ positions and whose work content can be executed within a defined station length. The second step uses integer programming (IP) to determine the number and combination of the various cycle sequences, such that the production demand is satisfied.     

Partner aggression severity as a risk marker for male and female violence recidivism

Pretreatment aggression severity was examined as a risk marker for recidivism in the treatment of partner aggression. Intact married couples experiencing husband-to-wife partner aggression were recruited from the community and participated in either conjoint group treatment or gender-specific group treatment. Elevated levels of husband and wife physical aggression and wife psychological aggression before treatment predicted the continuation and severity of physical aggression by both spouses during treatment and in the following year, with no significant differences across treatment formats. These results indicate that high levels of psychological and physical aggression signify a poor prognosis for both conjoint and gender-specific group treatment programs, suggesting the need for interventions of greater intensity, duration, and/or focus for individuals highest in psychological and physical aggression.