website investigation
back-end processes
stock control system
After an item has been paid for, dispatched and delivered the stock data store has to be updated. Sometimes items need to be returned for whatever reason and this can also affect the amount of items in stock. Below is a diagram that shows the stock in relation to the customer:
The stock also needs to be replenished and faulty items returned to the supplier. Below is a diagram of the stock in relation to the supplier:

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