MANUFACTURING – LEAN MANUFACTURING & PRODUCTION PLANNING CALCULATOR
Reorder Point
A precise tool.
What is the Reorder Point & How does it work?
In lean manufacturing, the reorder point (ROP) signals when a new order should be placed to avoid stockouts.
The ROP is calculated by multiplying the average demand rate by the supplier’s lead time, optionally adding safety stock for variability.
Accurate ROP calculation enables just‑in‑time replenishment, reducing excess inventory while maintaining service levels.
ROP = D \times L
D = average demand per period
L = lead time (periods)
L = lead time (periods)
Parameters
Result
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Frequently Asked Questions
What is a reorder point in lean manufacturing?
A reorder point is the inventory level that triggers a new order to replenish stock, preventing shortages.
How do I calculate the reorder point (ROP)?
Calculate ROP by multiplying average demand per period by lead time and adding safety stock if needed.
Why is it important to have an accurate reorder point?
An accurate ROP helps achieve just-in-time replenishment, reducing excess inventory while maintaining service levels.
What factors should I consider when determining the lead time for my reorder point?
Consider factors like supplier delivery times, transportation duration, and any potential delays in processing orders.
How does safety stock affect the reorder point calculation?
Safety stock is added to the ROP to account for variability in demand or supply, reducing the risk of stockouts.
Can you explain how the reorder point relates to just-in-time inventory management?
The reorder point is a key component of just-in-time (JIT) inventory management, ensuring that inventory levels are maintained without excess while avoiding shortages.
What happens if I set my reorder point too low?
Setting the reorder point too low can lead to stockouts, disrupting production and potentially losing customers.
Results are for informational purposes only and do not constitute professional advice.