Inventory must be allocated correctly<\/a> across stores, eCommerce, and distribution centers well before the first promotion goes live. And none of that planning means much if the data underneath it (like inventory counts, item records, pricing) isn’t accurate. Getting ERP data clean and reliable before peak season is one of the highest-leverage things a retailer can do in September.<\/p>\nBut internal readiness is only half the equation. Supply chain readiness extends beyond the four walls of any one organisation, and by the time a retailer’s promotions go live, every supplier, logistics provider, and carrier in the network needs to be ready too. The retailers that come out ahead don’t just have their own house in order, their entire trading partner ecosystem is prepared to move at peak speed from day one.<\/p>\n
Why September Matters More Than Ever<\/h2>\n
Internal readiness begins long before customers begin shopping.<\/p>\n
Every year, the holiday promotional calendar creeps up a bit earlier. Major sales start happening well before Black Friday, which means retailers need to have their plans locked in by September.<\/p>\n
That planning starts with forecasting demand across the supply chain. Demand patterns have gotten harder to predict, shopper behavior changes year to year, and a forecast built on last year’s numbers alone will leave retailers either overstocked in the wrong places or scrambling to restock in the right ones. Getting ahead of that means revisiting forecasts early and building in enough flexibility to adjust as real demand data comes in.<\/p>\n
Forecasting only matters if inventory is positioned to act on it. That means allocating stock across brick-and-mortar stores, eCommerce sites, and distribution centers based on where demand is going to show up this season. It also means labor. Warehouses and stores need staffing plans in place well ahead of peak volume, because even the best holiday readiness plan falls apart if the people needed to fulfill orders aren’t scheduled and ready.<\/p>\n
Underneath all your demand planning and forecasting is the data. Product and SKU attributes, vendor lead times, safety stock settings\u2026none of it is trustworthy at scale if the underlying ERP data hasn’t been cleaned up and validated. Retailers who tackle data issues early give themselves a lot more breathing room once October arrives. Getting the forecasting, inventory positioning, staffing, and data accuracy settled ahead of time means the team can focus on serving customers once the first holiday order comes in, instead of playing catch-up.<\/p>\n
Getting internal operations aligned is the right place to start, but even the best internal planning can fall short if the supply chain surrounding it isn’t ready to keep up. When order volumes climb during the holidays, so does the strain on every connection in the network. Trading partners are expected to process more purchase orders, send more accurate advance ship notices, and meet increasingly strict retailer compliance windows, all in less time than normal. Communication between suppliers, 3PLs, carriers, and retailers intensifies, and any gap in those connections becomes a problem fast. Supply chains that handle normal volume without issue can develop real bottlenecks when holiday complexity sets in: slower processing, missed compliance windows, and errors that compound under pressure.<\/p>\n
Where Holiday Readiness Typically Breaks Down<\/h2>\n
As holiday volume increases, existing weaknesses in inventory planning and visibility become much harder to absorb. Inventory visibility issues usually trace back to a few familiar sources. Inaccurate inventory counts make it hard to trust what’s truly on hand versus what’s in the system. Forecasting gaps mean the wrong products end up in the wrong places at the wrong time. And when channel allocation isn’t dialed in, stock can be sitting in a distribution center while a store or eCommerce channel is running low. All these issues connect back to ERP master data. When product records, locations, and quantities are accurate and consistent across connected systems, retailers have more current and reliable picture of what they have and where it is, which makes every other part of holiday planning easier.<\/p>\n
That internal accuracy only goes so far if the information flowing in from trading partners isn’t keeping pace. When inventory updates between suppliers and retailers are delayed or inaccurate, the picture inside the ERP is only as good as the last update received. Gaps in supplier communication or purchase order visibility mean replenishment decisions are being made on incomplete data, which makes an already complicated season even harder to manage.<\/p>\n
Operational Bottlenecks<\/h3>\n
Even with accurate inventory, operations can bottleneck in a handful of predictable spots. Warehouse capacity gets tight fast during peak volume, and without a plan for how to flex it, fulfillment slows down. Labor planning matters just as much: the right people need to be scheduled in the right places as order volume climbs. Internal workflows that work fine at normal volume can start to strain under holiday demand, and without clear order prioritisation, teams can end up spending more time deciding what to work on than working on it.<\/p>\n
Those internal bottlenecks are compounded when the supply chain side isn’t running smoothly either. Manual order processing is one of the most common places where things slow down during peak season; when purchase orders, ASNs, and invoices are handled by hand, holiday transaction volumes can outpace the team’s ability to keep up. Slow document exchange delays fulfillment. Supplier communication becomes harder to manage at scale. If EDI document versions or retailer spec changes aren\u2019t addressed in advance, even routine transactions can generate errors. PO and invoice reconciliation adds another layer of complexity during the holidays, when special promotional pricing increases the likelihood of discrepancies and the time it takes to resolve them.<\/p>\n
Compliance & Customer Expectations<\/h3>\n
Customers expect their holiday orders to show up on time, every time, and that expectation doesn’t leave much room for error. Meeting it depends on a few things working together: store replenishment that keeps shelves stocked as demand accelerates, and omnichannel fulfillment that lets retailers reliably deliver on promises like buy-online-pickup-in-store or ship-from-store, no matter which channel a customer chooses.<\/p>\n
Delivering those omnichannel promises also depends on suppliers and trading partners holding up their end. Advance Ship Notices need to be accurate and on time. Retailers continue to enforce strict ASN timing requirements during the holidays, with EDI chargebacks possible when a transaction misses the mark. Label compliance and routing guide adherence carry the same risks. Each major retailer has its own EDI requirements, and a document that doesn’t meet spec can delay a shipment, trigger a fine, or damage a relationship that took years to build. Getting ahead of these requirements in September is far less costly than resolving compliance issues once peak orders are already moving.<\/p>\n
Building a Holiday-Ready Retail Operation<\/h2>\n
Everything covered so far, the forecasting, the inventory positioning, the data accuracy, the bottlenecks, points back to the same foundation: the ERP system. Microsoft Dynamics 365 Finance and Supply Chain Management can bring demand planning, inventory optimisation, procurement, financial operations, and warehouse readiness into a connected operational picture. When those pieces are aligned across the platform, retailers gain broader visibility across the operation instead of relying on a patchwork of disconnected data.<\/p>\n
That alignment is what makes great holiday execution possible. Demand planning informs procurement decisions. Procurement decisions inform inventory optimisation. Inventory optimisation informs how warehouses prepare for volume. Each function feeds the next, and when they’re connected, retailers can move quickly and confidently instead of reacting to surprises as they come up. Great holiday execution starts with operational alignment.<\/p>\n
That operational alignment inside the ERP becomes even more powerful when it extends to the entire trading partner network. While internal systems keep the business organised, holiday readiness also depends on how well suppliers, logistics providers, carriers, and warehouse partners are connected and exchanging timely information.<\/p>\n
That’s where supply chain connectivity makes the difference. When trading partners exchange information through automated EDI<\/a>, transactions can move faster and with fewer manual-entry errors. Purchase orders can be processed more quickly, so suppliers can act sooner. ASNs and invoices can be generated automatically, reducing the manual work that slows teams down under peak volume. Inventory visibility improves because information moves more consistently instead of waiting on manual handoffs. And compliance improves too; automated document exchange helps trading partners meet retailer-specific requirements, reducing chargeback risk and protecting margins when it matters most.<\/p>\nActions To Take Now That Set Up Holiday Success<\/h2>\n
A few practical steps worth taking this September:<\/p>\n