Ozbiggles, bean counters love these sort of cheese paring games because they are very easy to play. You measure, for example, the width of the toilet paper roll and then compute the cost savings of making it a centimetre narrower and write a sober and wel reasoned paper advocating the change accordingly.
It's an easy game to play....badly.
To do it properly requires a calculation of costs related to the increased risk of a hull loss. Your insurer will do that for you.