What Makes a Good Parent Class?

A good parent class is defined by its usefulness for planning. But what makes a class useful?

1. It Groups Similar Goods That Behave in Similar Ways

• Obvious groupings: Some categories naturally belong together—e.g., dressy shirts should be their own parent class if net sales justify it.
• Sales & seasonality alignment: Items that don’t fit thematically but share sales trends can still belong together.
  • Example: Stickers in a skate shop might not justify a parent class but could be a child class under accessories alongside skate wax, multi-tools, shoelaces, and socks, all of which sell at a similar rate and price point.

2. It Is Large Enough to Impact Cash Flow

• A parent class should function as an independent profit center.
• If improving its performance won't significantly impact the business, it’s too small to be a parent class.

3. It Is Small Enough to Follow Predictable Patterns

• A parent class should exhibit its own trends and seasonality, rather than just reflecting overall store sales.

4. It Can Be Applied Consistently Across Locations

• Parent and child classes should be structured the same way across all locations to ensure effective tracking and analysis.

What a Parent Class Is Not (Usually...)

1. Vendor-Specific Classes Are Rarely Useful

• Vendors fluctuate in performance, but typically their merchandise categories remain stable.
• Instead of structuring by vendor, plan at the class level to identify:
  • Which vendor’s goods are driving sales.
  • Which products are underperforming.
  • Where growth opportunities exist.

Exceptions

• High-volume vendors with distinct Initial Markups (IMUs) may require separation if their pricing differs significantly from other merchandise.
• Lead time differences: A vendor with longer lead times may not align with the store’s Open-to-Buy (OTB) planning for that category.
• Brands with strong, consistent demand: Some brands (e.g., Nike, Adidas, Birkenstock) function as their own parent classes within footwear due to their dominance in the market.

2. Miscellaneous Items Don’t Automatically Deserve a Class

• An item should only be its own class if its sales volume justifies it.
  • Example:
    • If candles are the only home goods in a fashion boutique, they may seem like their own class.
    • However, if they only sell $5,000 annually, they are too small to be useful and should be grouped under accessories instead.