The HIPPO report I presented addresses the fact that peace operations are a long-term commitment. It's not cheap, and you cannot go for six months and then leave.
The UN has developed doctrine on how to reduce military involvement in peace operations as the peace process and the rebuilding of the state are progressing. It doesn't mean you go for a year and then withdraw all military components. You can reduce them, and you can give them different tasks.
As the situation is evolving and hopefully progressing, you reduce the military component, the police component, and actually the civilian component as well. The UN reduces all these components when it sees progress. Then after a while you give them different tasks. Instead of monitoring a ceasefire, for example, they might help secure the borders. This is the evolution. Sometimes you have progress, and then you have regress. In that case, you might have to bring back more military.