Demand Planning vs Supply Planning: Definition and Strategies

At Phase V Fulfillment, we always see the importance of planning. However, there are different approaches to planning, and one area of confusion we notice is between demand planning vs. supply planning.

These two processes are related in the ecommerce world, but each hones in on different goals. Demand planning has to do with predicting future customer demand, while supply demand focuses on how your business can meet that demand with the right inventory and production capacity.

In this article, we’ll show you how these systems work together and how you can capitalize on them to prevent stockouts, reduce excess inventory, and improve the efficiency of your fulfillment operations.

Demand Planning Definition

Let’s start with demand planning. What is it? Demand planning is simply predicting how much of a product customers will buy in the future. To do this, your company reviews past sales, market trends, promotions, and seasonal patterns to estimate what the demand is. 

Being accurate with demand planning helps businesses prepare for shifts in customer buying behavior.

More specifically, demand planning focuses on:

• Sales history analysis
• Seasonal demand forecasting
• Marketing campaign impact
• New product launches
• Customer behavior trends

As you can see, demand planning is critical in determining purchasing and production decisions.

Supply Planning Definition

Supply planning is a different thing altogether, and is about making sure your company has enough inventory, materials, and production capacity to meet the expected demand. After you forecast demand, you use supply planning to decide how the supply chain will meet those needs.

Some of the main components of supply planning involve:

• Production scheduling
• Inventory replenishment planning
• Supplier coordination
• Warehouse capacity planning
• Transportation and logistics coordination

Supply planning connects forecasting with day-to-day operations. It helps your business prepare for the future while keeping everything running smoothly now.

Read more about how supply planning works in the ecommerce industry in our Ecommerce Warehouse Management: The Essential Guide.

Demand Planning vs Supply Planning

The main difference between demand planning vs supply planning is the stage of the supply chain that each process manages.

In essence, demand planning predicts the future sales volume you can expect to have. How products are made, stored, and delivered are all part of supply planning. They work together to help you manage inventory. 

There are specific ways to improve demand planning, like using data-driven forecasting and watching sales trends. 

Strategies for Effective Demand Planning

Businesses can improve demand planning accuracy by using data-driven forecasting and monitoring sales patterns.

Some of the strategies we help companies implement in their demand planning include analyzing historical sales data, tracking seasonal buying trends, and incorporating marketing campaigns into forecasts. 

We show businesses how to incorporate demand forecasting software, which can then be used to regularly adjust forecasts based on new data.

Ecommerce businesses often update demand forecasts monthly or quarterly. At Phase V, we are with you every step of the way and can help you optimize your demand planning at any point.

Strategies for Effective Supply Planning

Once demand forecasts are created, businesses must focus on aligning their supply planning. This step makes sure products are available when customers place orders.

Some of the strategies you’ll implement in supply planning are:

• maintaining safety stock for high-demand products, 
• coordinating closely with suppliers, 
• monitoring warehouse capacity
• improving replenishment cycles
• using inventory management systems to keep this all under control

Strong supply planning helps avoid delays and bottlenecks in your fulfillment.

Check out our How to Calculate Ending Inventory to see more about warehousing strategies.

Final Thoughts

Knowing the difference between demand planning and supply planning can help you balance inventory and keep your supply chain running smoothly. Demand planning looks at what customers will want, while supply planning focuses on how your business will meet those needs.  When both are done right, you can reduce inventory risks and boost your fulfillment results.

Businesses that integrate forecasting with supply chain operations are better positioned to scale their ecommerce fulfillment. At Phase V, we can help with both demand planning and supply planning, giving you a significant advantage as you plot out your company’s future.

Contact us today to discuss how we can elevate your company’s planning needs.