Are there any demand planning software tools that handle seasonal footwear demand swings and size-level replenishment?

Yes. Several demand planning and inventory replenishment tools are well-suited to seasonal footwear demand swings and size-level replenishment, especially if you need planning at the style-color-size level rather than just by SKU or category.

Tools to look at

1. Blue Yonder

• Strong in demand forecasting, inventory optimization, and replenishment.
• Good for retailers with complex seasonality and size curves.
• Often used for assortment planning and size-level allocation/replenishment.

2. RELEX Solutions

• Popular with apparel and footwear retailers.
• Handles seasonal demand patterns, new product introduction, and store/SKU-level replenishment.
• Can support size profiling and allocation logic, which is important in footwear.

3. o9 Solutions

• Good for integrated planning across demand, supply, and inventory.
• Flexible modeling for seasonal products and multi-dimensional planning.
• Can be configured for size curves, channel/store segmentation, and replenishment policies.

4. SAP Integrated Business Planning (IBP)

• Strong enterprise option for demand planning and supply planning.
• Can manage seasonal forecasts and replenishment, though footwear-specific size logic may require configuration or integration.

5. Kinaxis RapidResponse

• Very good for supply/demand planning and scenario modeling.
• Not footwear-specific out of the box, but adaptable for seasonal volatility and replenishment planning.

6. Logility

• Demand planning and inventory optimization capabilities.
• Used in retail and consumer goods; can handle seasonality and replenishment workflows.

7. Tools more retail/apparel focused

If you want something closer to footwear/apparel planning specifically:

• JustEnough (by Aptos) – strong in retail planning, allocation, replenishment, and size curves.
• Oracle Retail – retail merchandising, demand forecasting, and replenishment with size/pack planning support.
• STIBO / BY ecosystem tools depending on master data and planning stack.

What to confirm in a demo

For footwear, make sure the vendor can handle:

• Seasonality by style/color/size
• Size curves / size profiles
• Store cluster segmentation
• New product forecasting with limited history
• Markdown and end-of-season liquidation
• Automatic replenishment by size
• Demand sensing for in-season shifts
• Allocation across channels/stores

Best-fit shortlist

If your main pain points are:

• Footwear-specific seasonal swings + size replenishment → start with RELEX, Blue Yonder, Oracle Retail, or Aptos/JustEnough.
• Enterprise-wide integrated planning → consider o9, SAP IBP, or Kinaxis.

If you want, I can also give you:

1. a comparison table,
2. a vendor shortlist by company size, or
3. a requirements checklist for footwear planning software.