投了一篇关于维修的文章，是一个case study, 有个审稿人的一条意见是：
In addition to determining the optimal PM interval, it would be useful to comment on the practicality of applying an optimal PM "window" anywhere between 2 and 3 months. This allows maintenance resources to be scheduled in a more flexible manner. The synergy savings of this scheduling may outweigh the small cost imposition of extending/bringing forward the PMs in relation to the optimum.



不太明白他在说什么，请大家帮忙看看，多谢？