What is production planning (MRP)?
The moment a business makes something, it is doing production planning, with or without software. The real question is whether you steer it from a spreadsheet or from a tool that does the math for you. Here is what production planning means, what MRP actually calculates, and where an ERP takes over.
TL;DR, the essentials
- Production planning is the discipline of turning customer demand into a realistic build plan: what to make, how much, and by when, given your materials, machines and people.
- MRP (Material Requirements Planning) is the engine behind it: from orders, forecasts and bills of materials, it works out exactly what to purchase and manufacture, and when.
- Two philosophies steer it: push (plan from forecasts, MRP) and pull (produce on real demand, kanban, just-in-time, lean).
- In practice, production planning is usually a module of an ERP, wired to inventory, purchasing and accounting.
Production planning is where a promise to a customer meets the physical reality of a shop floor. Sales say a batch ships Friday; the plan has to prove that the raw materials are in stock, the machines are free and the labor hours exist. Get it right and you keep your delivery dates while freeing up cash. Get it wrong and you swing between idle lines and last-minute firefighting. Let us break down what the term covers, the method that drives it, and the point where a spreadsheet stops being enough.
What is production planning, exactly?
Production planning is the set of activities that turn resources into finished goods: raw materials, machines, labor and time. Its purpose is to make the right quantity, at the right moment, at the right cost and quality. It spans demand forecasting, materials planning, shop-floor scheduling, work-in-progress tracking and quality control. Sometimes you will see it called production planning and control (PPC), or grouped with scheduling under the broader label of manufacturing planning.
Concretely, a customer order sets off a chain of decisions. Here is how it unfolds, step by step, in an organized shop.
Forecast and plan
Orders and demand forecasts become a master production schedule: what to build, in what quantity, for which date.
Explode the requirements
From the bill of materials (the list of components in a product), the system derives which materials and sub-assemblies to buy or make.
Release and track
You issue work orders, schedule the workstations, then track progress and quality all the way to the finished product.
In one sentence
Production planning is the craft of aligning what a business has to deliver with what its shop floor, its inventory and its suppliers can realistically produce.
What does MRP calculate?
MRP stands for Material Requirements Planning. It is the calculation at the heart of most production planning software. Feed it three inputs, the master production schedule, the bills of materials, and current inventory, and it answers the two questions that matter: what to order or make, and when. Where a spreadsheet quickly hits its limits (scattered data, manual math, versions that contradict each other), an MRP engine recalculates the whole net requirement instantly.
A production planning tool typically handles these building blocks:
- Bills of materials and routings: the composition of each product and the operations needed to build it.
- Work orders: the release, tracking and closing of each production batch.
- Requirements planning: the automatic netting of what to purchase against what you already hold.
- Scheduling: assigning work orders to machines and teams over time.
- Shop-floor tracking: real-time capture of hours, quantities produced and scrap.
MRP dates back to the 1960s, when manufacturers first computerized net requirements calculation. Its successor, MRP II (Manufacturing Resource Planning), added capacity (machines, labor) and the financial dimension, so the plan reflects not just what materials you need but whether you actually have the hours to build it. MRP II remains the backbone of most production modules today, and it is the direct ancestor of the modern ERP.
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Quick quiz
What does MRP stand for?
Push or pull: which production method should you use?
Production planning is not just software. It rests on organizing methods that the tool then supports. Two broad philosophies compete, and often combine: producing from forecasts (push flow) or producing on real demand (pull flow).
- MRP (push flow): you plan production from orders, forecasts and bills of materials. The system pushes work out ahead of demand, which protects delivery dates but can inflate inventory.
- MRP II: the evolution of MRP that also factors in machine and labor capacity plus the financial side. It structures the core of most production planning software today.
- Kanban (pull flow): born at Toyota, this card-based system triggers production or replenishment only when a station actually consumes parts. Downstream demand pulls the upstream supply.
- Lean manufacturing: a continuous-improvement approach that eliminates waste (waiting, overproduction, needless stock, motion) to keep only what creates value.
- Just-in-time (JIT): make and deliver exactly what is needed, when it is needed, to cut inventory to the minimum. It goes hand in hand with kanban and lean.
No method is universal
Push flow (MRP) secures lead times but can bloat inventory; pull flow (kanban, JIT) shrinks inventory but assumes reliable, responsive suppliers. Recent supply-chain shocks pushed many manufacturers to rebuild a safety buffer rather than chase absolute zero stock. Most plants blend both approaches by product, and a good tool is one that lets you configure each case.
Why does production planning matter?
Run well, production planning acts directly on profitability and customer satisfaction. The most concrete stakes are these:
- Hit delivery dates: ship on the promised date, without the shortages or delays that drive customers away.
- Control costs: limit scrap, lost hours and dead stock that ties up working capital.
- Balance capacity: run machines and teams at the right pace, avoiding both overload and idle time.
- Guarantee quality and traceability: know which raw-material lot went into which product, a regulatory must in food, pharma and aerospace.
Poorly run production planning gets paid for in cash: bloated stock on one side, stockouts on the other, shop floors improvising day to day, and margins eroding without anyone knowing quite why. This is exactly where a tool adds visibility, replacing gut feel with numbers.
Good habit
Before you invest in software, map your real flows first: how an order actually moves through the shop. A production tool amplifies a clear organization, but it will not fix a badly defined process.
What is the role of an ERP or production module?
Production planning never lives in a vacuum: it depends on inventory, purchasing, sales and accounting. That is why it is most often offered as a module of an ERP, the software that centralizes the whole business in a single database. The payoff is direct: when a work order consumes materials, inventory decrements and the purchasing module fires a replenishment, with no re-keying. If the concept is new to you, our primer on what an ERP actually is lays out the full picture.
Two approaches coexist on the market:
- The production module of a general-purpose ERP (Odoo, ERPNext, Microsoft Dynamics 365 Business Central, SAP, NetSuite): production is one brick among many, natively connected to inventory, purchasing and accounting. Ideal when you want a single tool for the whole company.
- A dedicated MRP or MES tool: more specialized for demanding industrial needs (fine scheduling, advanced shop-floor execution). It then interfaces with the ERP for the management side. A fit for manufacturers with complex processes.
On pricing, open-source ERPs lead the searches. Odoo ships a full Manufacturing (MRP) app, with a One App Free plan limited to a single app, then a Standard plan around $24.90 per user/month billed annually that unlocks every app (indicative US pricing, July 2026, check odoo.com/pricing since Odoo adjusts rates once or twice a year). ERPNext is free when self-hosted, with managed Frappe Cloud from around $5/month. Most other solutions (NetSuite, Dynamics 365 Business Central, SAP Business One) are priced on a custom quote, based on scope and user count. Because production is so tightly coupled to stock, it pays to read our companion piece on inventory management alongside this one.
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Your next step
To go further, read our best ERP software 2026 comparison, our guide on how to choose an ERP, or our explainer on inventory management, a function directly wired to production.
Frequently asked questions
What is the difference between production planning and MRP?
Production planning is the discipline: organizing the transformation of raw materials into finished goods, covering forecasting, materials planning, scheduling and quality. MRP (Material Requirements Planning) is the calculation engine inside it. From the master schedule, bills of materials and current inventory, MRP works out what to purchase and manufacture, in what quantity and by when. In short, you can do production planning without MRP, but MRP is what makes it fast and reliable at scale.
What is the difference between MRP and MRP II?
MRP (Material Requirements Planning), from the 1960s, calculates net material requirements from demand and bills of materials. MRP II (Manufacturing Resource Planning) extends it by adding machine and labor capacity plus the financial dimension, so the plan reflects whether you actually have the hours to build what you scheduled. MRP II is the direct ancestor of today’s ERP and remains the core of most production modules.
Do you need an ERP or a dedicated MRP tool?
It depends on the complexity of your processes. For most small and mid-sized manufacturers, the production module of a general-purpose ERP (Odoo, ERPNext, Dynamics 365 Business Central, SAP, NetSuite) is enough, with the advantage of being natively connected to inventory, purchasing and accounting. Manufacturers with demanding needs, such as fine scheduling or advanced shop-floor execution, may prefer a dedicated MRP or MES tool interfaced with the ERP. Either way, integration with the rest of the business is the deciding factor.
Kanban or MRP: which method should you choose?
They answer different logics. MRP works in push flow: you plan production from forecasts, which secures lead times but can inflate inventory. Kanban works in pull flow: production is triggered by real consumption, which shrinks inventory but assumes reliable suppliers. Most manufacturers combine the two by product, and a good production planning tool should let you configure each case.
Is there free production planning software?
Yes. ERPNext, an open-source ERP with a manufacturing module, is free when self-hosted (only hosting and integration cost money), with managed Frappe Cloud from around $5/month. Odoo also offers a One App Free plan, free but limited to a single app, then a Standard plan around $24.90 per user/month billed annually that unlocks the full Manufacturing app (indicative US pricing, July 2026).