Material Requirements Planning | Optiwise
Learn Material Requirements Planning, key inputs, steps, example, benefits, mistakes, and how Optiwise connects BOM, inventory, purchase, and production.
Material Requirements Planning: How Manufacturers Know What to Buy and When
Material Requirements Planning, or MRP, solves one of the most common factory questions: what material is needed, how much is needed, and when should it arrive?
Without MRP, purchase teams often work from memory, production urgency, or disconnected spreadsheets. That creates two opposite problems at the same time: stockouts for critical items and excess stock for slow-moving items.
MRP connects demand, BOM, inventory, purchase orders, and lead time so material planning becomes more disciplined.
This guide explains MRP and how AICAN Optiwise helps manufacturers connect material planning with actual factory operations.
What Is Material Requirements Planning?
Material Requirements Planning is a method used to calculate materials and components required for production.
It uses demand from sales orders, forecasts, production plans, or master production schedules. It then checks BOM, available stock, pending purchase, lead time, and safety stock to identify shortages.
What Questions Does MRP Answer?
MRP helps answer:
- What materials are required?
- What quantity is required?
- What quantity is already available?
- What is already on order?
- What is short?
- When should purchase or production happen?
These answers help purchase and production teams act before shortages stop the factory.
Key Inputs for MRP
MRP needs accurate demand, approved BOM, clean item master, available stock, pending purchase orders, lead time, safety stock, lot size, minimum order quantity, and production schedule.
Bad inputs create bad MRP output. If stock records are wrong or BOM is outdated, MRP will recommend the wrong action.
MRP Process Steps
- Identify demand from sales orders, forecast, or MPS.
- Explode BOM to calculate component requirements.
- Check available inventory.
- Consider pending purchase orders or planned receipts.
- Apply lead time and safety stock rules.
- Generate shortage and planned order recommendations.
- Review exceptions and release purchase or production actions.
MRP Example
A manufacturer needs to produce 100 finished units. Each unit requires 2 bearings and 1 motor.
Total requirement is 200 bearings and 100 motors.
If stock has 80 bearings and 40 motors, and pending purchase has 50 bearings, the remaining shortage is 70 bearings and 60 motors.
MRP helps identify this before production starts.
Benefits of MRP
MRP reduces stockouts, improves purchase planning, reduces emergency buying, supports production schedules, lowers excess stock, improves vendor planning, and supports better working capital control.
It also helps managers see which production orders are at risk due to material shortage.
Common Mistakes
The first mistake is using inaccurate inventory data.
The second mistake is not maintaining BOMs.
The third mistake is ignoring lead time.
The fourth mistake is not reviewing MRP exceptions.
The fifth mistake is using MRP output without planner judgment.
The sixth mistake is not connecting purchase follow-up with production priority.
How Optiwise Helps
Optiwise by AICAN helps manufacturers connect MRP with BOM, purchase, smart GRN, inventory, QR tracking, production, WIP, dispatch, reports, and AI-assisted dashboards.
Optiwise can help teams see available stock, shortages, pending purchase, lead-time risk, and production impact in one connected workflow.
Practical Implementation Tips
Clean item masters. Standardize UOM. Maintain BOM accuracy. Update inventory through GRN and issue transactions. Define lead times. Track pending purchase. Review shortage reports regularly. Close the loop after actual consumption.
This article is for general business understanding only and is not accounting, tax, legal, financial, or compliance advice. Inventory valuation and financial reporting should be reviewed with qualified professionals.
Founder’s Note
At AICAN, we believe material planning should not depend on panic. MRP works when the data behind it is clean and connected.
Optiwise is built to help manufacturers plan material from real demand, live stock, purchase status, and production needs.
FAQs
What is Material Requirements Planning?
MRP is a planning method that calculates materials needed for production based on demand, BOM, stock, purchase orders, and lead time.
What are the key inputs of MRP?
MRP needs demand, BOM, item master, stock, pending purchase, lead time, safety stock, and production schedule.
What is the main benefit of MRP?
MRP helps prevent material shortages and excess inventory by planning purchase and production requirements in advance.
Why does MRP fail?
MRP fails when BOM, inventory, lead time, or demand data is inaccurate.
How does Optiwise help with MRP?
Optiwise connects BOM, inventory, purchase, GRN, QR tracking, production, WIP, reports, and AI dashboards for better material planning.
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