Open Stock Ordering vs Prepack: Which Should Retailers Use?

Open Stock Ordering is the ability to order individual items or variants independently instead of purchasing a predefined pack. Comparing open stock to prepack (pre-bundled assortments or fixed-case configurations) helps retailers choose the right sales and replenishment model for each SKU.

Prepack systems ship items in fixed assortments or case quantities — for example, a case of 12 bottles or a multipack of assorted colors. Open stock allows single-item sale and refills from broken cases. Each model has trade-offs that affect merchandising, logistics, and profitability.

Core Differences

• Flexibility: Open stock maximizes customer choice by letting buyers select single items; prepacks streamline store-facing labor by delivering fixed assortments.
• Inventory Visibility: Open stock requires item-level tracking; prepacks can be managed at the case level until the pack is opened.
• Picking And Handling: Open stock increases single-unit picks; prepacks reduce pick complexity because assortments are pre-created.

When Open Stock Is The Better Choice

Open stock is preferable when customers value choice and when demand for individual variants is strong enough to justify unit-level handling. Typical scenarios include:

• High SKU Variety: Apparel, footwear, and accessories where buyers mix sizes and colors.
• Replacement Parts: Spare components sold one-by-one to repair equipment.
• Impulse And Gift Items: Low-cost items where single-unit purchase drives conversion.

When Prepack Works Better

Prepacks reduce in-store labor and shrink and are often used where merchandising plans call for consistent visual presentation or where sales patterns are predictable across assortments. Situations include:

• Rapid Replenishment For High-Density Stores: Grocery and mass retail where shelf restock speed matters.
• Seasonal Promotional Packs: Bundles created to support seasonal displays or promotions.
• Cost-Sensitive Logistics: When cases travel long distances and breaking packs at origin is more efficient than handling single units through the full supply chain.

Financial Comparison

Open stock can increase margin through higher sell-through and reduced markdowns if customers only take what they need. However, unit picks and increased inbound handling of break packs add labor and fulfillment costs. Prepacks lower handling costs per unit and reduce shrink but risk leaving unwanted variants unsold.

Systems And Process Requirements

Retailers should evaluate their systems before shifting strategy:

• WMS And POS Integration: WMS must track and allocate single units; POS must reflect pricing for singles and packs accurately.
• Barcoding: Every sellable unit ideally needs a unique barcode or consistent GTIN to maintain traceability when cases are broken.
• Replenishment Logic: Demand forecasting and reorder points must operate at the unit level for open stock, while prepacks can use case-level replenishment metrics.

Operational Hybrid: Best Practice

Many retailers adopt a hybrid approach: sell fast-moving SKUs open-stock in stores while using prepacks for slow-movers or for shipments to remote locations. This hybrid reduces labor where it matters and preserves customer choice for priority items. Examples include: apparel chains that open stock core basics for fitting rooms but maintain prepacks for seasonal multipacks.

Decision Checklist For Merchants

• Customer Preference: Do customers typically buy single units or multiple units of the SKU?
• Unit Value: Is the per-item margin high enough to offset increased handling costs?
• Supply Chain Complexity: Can your network absorb more unit-level picks and replenishment events?
• Compliance And Traceability: Are there regulatory reasons to keep items in sealed packs?

In short, the Open Stock Ordering model increases shopper flexibility and unit-level control but needs compatible systems and operational adjustments. Use prepacks where handling costs and display consistency outweigh the benefits of single-item choice, and consider a hybrid strategy to capture the advantages of both approaches.