Choosing an inventory control method that matches your inventory needs and KPIs is the next step. The common methods range in complexity, accuracy, and cost. For example, the periodic inventory system involves counting your inventory at regular intervals, such as monthly or quarterly, and updating your records accordingly. This is simple and inexpensive, but it does not provide real-time information and may result in stockouts or overstocking. On the other hand, perpetual inventory system involves updating your inventory records continuously as you receive and sell products. This requires a barcode scanner or an RFID reader to scan the products and an inventory management software to record the transactions. It is accurate and timely but more expensive and requires more maintenance. Additionally, ABC analysis categorizes your inventory into three groups based on their value and demand: A (high value, high demand), B (medium value, medium demand), and C (low value, low demand). You then apply different inventory control policies for each group to prioritize your inventory and allocate resources more efficiently. Lastly, Just-in-time (JIT) inventory system involves ordering and receiving products only when they are needed to minimize the amount of inventory held. This reduces costs and waste but requires a reliable supplier network and a flexible production process.