Electrical Maintenance Stock Reorder Planner
Calculate the inventory level at which a maintenance material should trigger replenishment, and estimate how many days remain before that threshold is reached.
Calculate reorder point
Reorder recommendation
How the maintenance reorder point works
The reorder point is the inventory level that should trigger replenishment early enough to cover expected use during the effective replenishment window while still preserving safety stock.
Lead-time demand = Average daily usage × Supplier lead time
Reorder point = Lead-time demand + Safety stock + Review/ordering delay demand
The review delay is converted to inventory demand using the same daily usage rate. That makes the threshold more useful where purchasing decisions are not instantaneous.
Suggested order timing
The model estimates days until the reorder point by dividing the inventory above that threshold by daily usage. If the current inventory is already at or below the reorder point, the result flags the item as ready for reorder now.
Maintenance-specific considerations
- Usage can be highly intermittent, so a simple daily average should be refreshed periodically.
- Critical spares may need a separate stock strategy even when average usage is low.
- Lead time should reflect the real replenishment path you use, not just a supplier's factory lead time.
- Safety stock is a management assumption, not an automatic code requirement.
FAQs
What is the difference between reorder point and order quantity?
The reorder point answers when to order. Order quantity answers how much to order.
Can current inventory be below zero?
No. Negative inventory is a separate data-quality or transaction issue and should be corrected before planning replenishment.
Why add review delay?
An item can reach a reorder threshold while purchase approval, quotation and order processing still take time. Modeling that delay reduces false confidence.
Does this guarantee no stockout?
No. It relies on the usage and lead-time assumptions you provide. Unexpected demand or supplier delays can still create shortages.