What problems do retailers have if brands don't meet OTIF requirements?
Retail stores run on very precise forecasting. There's only a limited amount of shelf and storage space, so if products arrive early, there may not be anywhere to store or display them. SKUs that arrive too early may also need to be handled more, which can result in quality issues and damage. This can be especially problematic for food and beverage retailers who rely on product freshness to attract consumers. Fresh products arriving early need to be stored for longer, lowering their appeal.
Retail employees have multiple roles and stores often work on tight shifts with little overhead. Stores must consider many factors when scheduling staff. Early or late deliveries mean that employees must be diverted way from their main roles to assist with handling products. This means cashiers, customer service specialists, managers, and others can't assist customers or run the store due to problems with deliveries.
Loading docks run on a tight schedule and have limited space. If your delivery isn't on time, this causes congestion and has a knock-on impact on other trucks that are trying to deliver products.
While early delivery can be great if you're going directly to the consumer, that's not the case when shipping to retail stores. The earlier you deliver something the longer it needs to be stored. This increases a retailer's costs, and takes up space that they may need for products that reach them on time.
Late delivery means products aren't in stock, leading to empty shelves. If a consumer can't get the product they want, they might go to a competing retailer or order the product online.