Production Planning Methods

Production planning methods are a set of strategies and tools used to synchronize market demand with a company’s actual production capabilities. They include both the selection of a production model (e.g., MTS or MTO) and specific techniques for scheduling, capacity balancing, and inventory management. Their primary goal is to optimize production processes, shorten the production cycle, and improve efficiency while maintaining cost control.

From the article, you will learn about:

• What production planning methods are, and why they are crucial for a company
• How planning works at the strategic, tactical, and operational levels
• How to choose a planning model depending on the type of production
• What MRP, JIT, and the Theory of Constraints (TOC) are
• How to create effective schedules and balance production capacity
• How IT systems and Industry 4.0 support planning processes

What are production planning methods, and why are they crucial for a company?

Effective production process management means maintaining a balance between: the availability of raw materials and components, workload at workstations, on-time deliveries, inventory levels, and financial liquidity.

The effectiveness of a selected method is determined by KPIs such as:

• OEE (Overall Equipment Effectiveness) – machine utilization efficiency
• OTIF (On Time In Full) – on-time order fulfillment
• Inventory turnover
• Level of defects and complaints

The choice of production planning methods depends on the scale of operations (job production vs. mass production), demand variability, and customer service strategy.

How does planning work at the strategic, tactical, and operational levels?

The planning process has a hierarchical structure, often referred to as a planning pyramid, where each level has a different time horizon and scope of responsibility.

• Strategic planning (long-term – over 5 years)
  This is the highest level of planning. It includes investment decisions (expansion of machinery, automation), development of new products, geographic expansion, and shaping the production model (e.g., switching from MTS to MTO). At this stage, a technical and economic plan is created, defining production capacity and cost structure.
• Tactical planning (mid-term – 2–5 years)
  This level synchronizes strategy with actual resources. It includes production volume planning, workforce planning, inventory policy, and interdepartmental planning. Demand is balanced with available production capacity here.
• Operational planning (short-term – days/weeks)
  The most detailed level, covering order scheduling, resource allocation, intra-department planning, and real-time response to disruptions. It directly ensures plan execution and workload control.

From a management perspective, planning is divided into strategic, tactical, operational, and financial (budget) planning.

How to choose a planning model based on the type of production?

Basic production models differ in the moment production starts relative to the customer order.

• MTS (Make-to-Stock) – production based on demand forecasts; typical for mass and continuous production
• MTO (Make-to-Order) – production starts after receiving an order; minimizes finished goods inventory; common in job or batch production
• ATO (Assembly-to-Order) – assembly based on ready modules; a compromise between flexibility and availability
• ETO (Engineer-to-Order) – design and production tailored to individual orders; typical for highly complex, custom production

MTS vs MTO comparison

The choice of model should consider market stability, production cycle length, and required flexibility.

What are MRP, JIT, and the Theory of Constraints (TOC)?

• MRP (Material Requirements Planning)
  A push-based method that calculates material requirements using the production schedule, product structure (BOM – Bill of Materials), and inventory levels. The system generates purchase and production orders to ensure the availability of components.
• Just-in-Time (JIT) and Lean Manufacturing
  JIT represents a pull model where production is triggered by actual demand. The key control tool is Kanban, which signals the need to replenish batches. Supporting elements include:
  • One Piece Flow – single-piece flow
  • Heijunka – production leveling
  • Kaizen – continuous improvement
• Theory of Constraints (TOC)
  This method focuses on identifying bottlenecks – resources limiting system throughput. Management involves identifying the constraint, maximizing its utilization, and subordinating the rest of the system to it.

How to create effective schedules and balance production capacity?

Scheduling can be done forward (from the start date) or backward (from the delivery date).

The main visual tool is the Gantt chart, which shows task sequences and dependencies. Capacity balancing involves matching workstation workloads to available capacity.

Common rules include:

• SPT (Shortest Processing Time)
• EDD (Earliest Due Date)
• FIFO (First In, First Out)

In complex projects, the Critical Path Method (CPM/PERT) is employed to identify tasks that determine the project’s completion time.

How do IT systems and Industry 4.0 support planning processes?

Modern planning cannot function without IT systems:

• ERP systems – integrate data from sales, warehouse, and production, forming the foundation for consistent production management
• APS (Advanced Planning and Scheduling) – enable planning with finite capacity, what-if simulations, and real-time optimization
• MES systems – provide real-time production monitoring, collect machine data, and support OEE analysis
• Industry 4.0 – integration of IoT, AI, and Big Data enables failure prediction, order sequencing optimization, automated planning decisions, and digital workflow implementation

Advanced solutions such as FabriFlow enable full synchronization of production planning, execution, and reporting.