1. Have you determined how you are going to organize the inventory data and what data you want to track?
2. Determine what information you'll have in the barcode. (i.e product name/number , location, min/max inventory quantities?) and determine what data you'll keep in files or databases. These can be linked to the barcode. Keep in mind how much space you have to contain the barcode and still keep it readable.
3. Pick a common font for your barcode. ( We use 3of9 ). THis way you can prevent incompatibilities with some scanners.
4. Don't forget reporting standards. What data will management want to see and will they require inventory tracking, such as purchase or usage history.
Good luck.