Common reasons for items being missed off orders are;
The most likely cause is that someone has deleted an item off an order and chosen Wrong supplier which will delete the supplier from the card.
A supplier’s name may be incorrectly spelled on the stock card. Ensure that the correct supplier is added to the stock card.
The ReOrder option on the stock card is not ticked. This tells RxOne that the stock item is no longer required, so it won't be ordered.
The order date has been deferred in a previous order, so the item will not be ordered before the deferred date unless it is sold.
The Liquidity Setting setting tells the computer how generous or frugal with the stock the management wants it to be. The setting needs to be correct on the particular unit that the order is made up on.
The usage is decreasing, and the computer's calculations show that the SoH is sufficient. The user may remember the previous high usage and think that the item has been 'missed'. Look at the stock card, and consider the usage.