The biggest problems with producing too much are lost sales and customer dissatisfaction.

Overproduction

Overproduction occurs when more goods are produced than are demanded by the market, often leading to excess inventory and wastage of resources.

Lost Sales

Revenue that was not earned due to an inability to meet customer demand or because the customer chose a competitor's product.

Customer Dissatisfaction

Negative feelings or a state of disappointment experienced by customers when products or services fail to meet their expectations.