OK. Here's the first clue:
Forget the term "stockroom" and adopt "warehouse."
Then google the term "warehouse management" and see what you come up with to give you a basic understanding of what is involved in management of any "in and out process of handling physical items."
There is little sense to any of us recreating the wheel here and we don't have personal knowledge of you and your capabilities and sensibilities to recommend a specific text to give you what you need. Even this Wiki definition might frustrate some folks
http://en.wikipedia.org/wiki/Warehouse_management_system
We want you to resolve your question, though, so come back to us with some specific questions as you gain some basic knowledge about warehousing concepts and systems ranging from paper and pencil to full electronic for managing small and large warehousing operations.
I'm sorry to say I don't know of any 1-2-3 simple way to make you an expert in one or two paragraphs here in the Cove.