Retail forecasting is failing at scale, and the money involved proves it. IHL Group's 2026 Inventory Distortion Study puts the global cost of out-of-stocks and overstocks at $1.7 trillion, equal to 6.2 percent of global retail sales. Nearly two-thirds of that figure comes from stockouts alone.
At the same time, Capgemini research shows 56 percent of retailers increased generative AI spending since 2024, yet most still report no measurable business impact from it. Retailers are investing more in AI and still missing the moment. The gap isn't a lack of technology. It's where that technology sits in the planning process.
Here's the uncomfortable truth: forecasting isn't broken because retailers lack data or algorithms. It's broken because the AI is bolted onto legacy planning architecture instead of built into the commerce platform itself. This is exactly the gap Dynamics 365 Commerce AI is designed to close.
Why Retail Forecasts Keep Missing
Most retail forecasting still runs on static, product-first planning cycles built for a slower era, when demand moved on seasonal timelines and a quarterly reforecast was good enough. That model doesn't survive contact with 2026 retail.
A product can trend on social media and sell out within hours. Currency shifts, tariff changes, or a competitor's flash sale can move demand within a single day. Forecasts built on trailing 12-month sales history and manually recalibrated statistical models simply cannot react at that speed.
The deeper issue is architectural. Point-of-sale data, e-commerce transactions, inventory positions, and customer behavior often live in disconnected systems. Planners are working with a fragmented, delayed view of demand, not a real-time one. Even when the signals exist, such as trending SKUs, sentiment shifts, or localized demand spikes, most retail teams lack the workflow to act on them fast enough.
The result is a familiar cycle: safety stock buffers grow, markdowns increase to clear excess inventory, and the products customers actually want run out at the shelf or the digital storefront.
What's Actually Broken in Retail Planning
The technical failure sits in three places. First, forecasting models are typically trained on internal historical data alone, ignoring external demand signals like search trends, weather, local events, and competitor pricing that materially shift near-term demand. Second, forecast updates run on batch cycles, weekly or monthly, when fast-moving categories in fashion, grocery, and specialty retail need daily or even continuous recalculation.
Third, and most costly, forecast output rarely connects directly to execution. A demand signal can be accurate and still deliver zero business value if it doesn't automatically influence replenishment quantities, pricing, or allocation decisions inside the commerce and supply chain systems.
This is a systems integration problem as much as a data science problem, and it's why point-solution forecasting tools, layered on top of an already fragmented tech stack, rarely solve it end to end.
Who Needs to Own This Problem
Forecasting accuracy isn't a merchandising issue anymore. It's a cross-functional risk that sits squarely with the CTO and CXO. Merchandising owns assortment and buying decisions. Supply chain owns inventory positioning and fulfillment.
Finance owns the margin impact of every markdown and every missed sale. When these teams work from different data sets and different forecast numbers, the business makes conflicting decisions from a single demand signal.
CTOs are the ones with the platform-level visibility to fix this, because the fix requires unifying data across commerce, ERP, and supply chain systems into one environment where every function is planning from the same AI-generated forecast.
CXOs are the ones accountable for the P&L consequences: lost revenue from stockouts, eroded margin from overstock markdowns, and the customer churn that follows a bad availability experience.
Where the Fix Needs to Happen
The fix cannot live in a bolt-on analytics tool sitting beside the commerce platform. It has to live inside the transaction layer itself, where sales, inventory, pricing, and customer data are already flowing. This is precisely the design principle behind Dynamics 365 Commerce AI: forecasting and demand sensing are embedded directly in the commerce and supply chain environment, not retrofitted from the outside.
In Microsoft's 2026 Release Wave 1, Dynamics 365 Supply Chain Management strengthened demand and supply planning with price-demand correlation modeling and capacity-to-promise date protection, meaning forecasts now account for how pricing changes shift demand, and delivery promises are validated against real production and inventory capacity before they're made to the customer.
Combined with Dynamics 365 Commerce, retailers get a single environment where online, in-store, and marketplace transactions feed the same forecasting engine in near real time.
How Dynamics 365 Commerce AI Fixes Retail Forecasting
Demand sensing across internal and external signals. Dynamics 365 Commerce AI ingests point-of-sale data, e-commerce behavior, and market signals together, using machine learning models such as gradient boosting and demand-sensing algorithms that adjust dynamically instead of waiting for a scheduled recalculation. This is the shift from static forecasting to continuous forecasting.
Copilot-driven scenario planning. Built-in Copilot capabilities let planners query demand data in natural language and run multiple scenario paths, testing a promotional lift, a supply disruption, or a price change before committing inventory, rather than discovering the impact after the fact.
Forecast-to-execution integration. Because forecasting sits inside the same platform as inventory, pricing, and order management, an updated demand signal automatically flows into replenishment quantities and allocation decisions. Organizations implementing AI-driven demand planning against a clean, unified data foundation are seeing forecast accuracy gains in the 20 to 50 percent range, according to Microsoft partner implementation data.
Predictive inventory and warehouse optimization. AI-driven inventory rebalancing and picking route optimization reduce the operational drag between an accurate forecast and product actually reaching the shelf, closing the last-mile gap that undermines even well-built forecasts.
Unified visibility for cross-functional accountability. Merchandising, supply chain, and finance work from one AI-generated forecast inside Dynamics 365, rather than reconciling three different spreadsheets after the fact.
The Path Forward for CTOs and CXOs
Fixing retail forecasting in 2026 starts with treating AI as core infrastructure, not an add-on:
- Unify commerce, inventory, and customer data into a single environment before layering AI on top.
- Move from quarterly forecast cycles to continuous, AI-monitored demand sensing.
- Connect forecast output directly to replenishment, pricing, and allocation execution.
- Build shared accountability across merchandising, supply chain, and finance on one forecasting system of record.
The technology to solve retail's forecasting problem already exists inside Dynamics 365 Commerce AI. The retailers who close the $1.7 trillion distortion gap in the next few years won't be the ones who bought the most AI tools. They'll be the ones who rebuilt forecasting into the core of how their commerce platform runs.
Dynamics Monk helps enterprise retailers implement and optimize Dynamics 365 Commerce AI across forecasting, inventory, and omnichannel operations. If your forecasts keep missing, let's talk about what's actually broken in your data foundation.
Originally published on the Dynamics Monk blog.
