Minimum/Maximum Quantity Manager allows you to set minimum and/or maximum quantities products must be ordered in. Quantity restrictions may be set individually for each product, and/or globally. Global restrictions may be applied to all products, a specific list of products, or products matching a price criteria. For example, you can configure a 2 piece minimum for all products $5 or less. If using a list of products support for * wild cards is included (to include all products starting with specific characters). If both global and product specific restrictions apply to a product, the product restrictions will have priority. For example, you could set a global 2 piece minimum on all products, but have a specific product flagged as 3 piece minimum. Minimum/maximum restrictions apply to all customer by default, but can also be limited to customers assigned to a particular price group.

The basket contents can either be automatically checked and auto-adjusted every time the basket changes, or only checked when the customer attempts to checkout. If auto-adjusting is enabled and a minimum/maximum restriction is not met, a configurable, tokenized message is displayed and the quantity is automatically changed. A message might say, for example, "Quantity for widget adjusted to 4 to meet maximum requirement of 10" (if, say, a customer already had 6 widgets in her basket and tried to add another 5). If auto-adjusting is not enabled, the basket is only checked during checkout. If any restrictions aren't met the customer is redirected to the basket contents page, and a configurable error displays prompting the customer to adjust the basket. The location of the error message is configurable, and can be set to Above Global Header, Below Global Header, Page Top (top of main right cell), or JavaScript Alert.

If products flagged with minimum/maximum quantity restrictions contain attributes, the module also provides a choice between counting each attribute combination as a separate product, or counting them cumulatively. Say a t-shirt is sold in 3 colors, has a minimum quantity of 10, and the customer adds 3 red, 3 blue, and 4 green shirts. If counting attribute combinations cumulatively, the minimum is considered met. If counting individually, the customer must order 10 for each color ordered.