Within Sage you can allocate stock to allocate quantities of stock to a project or for use elsewhere. This prevents the stock being used for something else. Here is an article on how this works- https://ask.sage.co.uk/scripts/ask.cfg/php.exe/enduser/std_adp.php?p_faqid=18854. A customer would find it useful to have this stock level imported to be displayed on a product record.