The operating question behind the number
From the controlled economic order quantity dataset, estimate the order quantity that balances entered annual ordering cost and per-unit holding cost. The worksheet is narrow by design: it measures the entered relationship and leaves policy choices with the business.
The management record for economic order quantity should state that the model should be rerun when a material record changes, not merely when someone prefers a different outcome.
With economic order quantity defined, reconcile this page with the Inventory Sell Through Rate Calculator only when both use a compatible inventory sell through rate population.
Arithmetic used on this page
With economic order quantity defined, apply the field definitions before the equation. EOQ is the square root of two times annual demand times order cost divided by annual holding cost per unit. Consistent classification is part of the calculation, not a cosmetic note.
A manager interpreting economic order quantity should note that the operating record can continue into the Inventory Carrying Cost Calculator if inventory carrying cost needs measurement.
The review trail for economic order quantity supports this point: compare reported and adjusted cases side by side if either Annual unit demand or Ordering workdays per year contains a management allocation.
Read the sample case
The default run uses Annual unit demand = 96000 units; Administrative cost per order = $145; Inventory cost per unit = $24; Annual holding-cost rate = 22%; Ordering workdays per year = 250 days. Recreate that output once, then replace the entire field set rather than mixing sample and live data.
A saved economic order quantity scenario makes clear that when live values replace the sample, save the calculation date and the source-system extraction time.
Establish the working dataset
Inventory control evidence: Annual unit demand should come directly from the inventory control evidence. Do not replace missing annual unit demand with a target. Treat Annual unit demand outliers consistently with Administrative cost per order records.
Inventory control evidence: Preserve the Administrative cost per order source column. Date its Administrative cost per order extraction. Document whether canceled activity changes administrative cost per order. Archive reconciled Administrative cost per order and Inventory cost per unit after approval.
Inventory control evidence: Enter Inventory cost per unit only after the inventory control manager confirms its scope. Do not replace missing inventory cost per unit with a target. Never infer Inventory cost per unit from Annual holding-cost rate; preserve both evidence trails.
Inventory control evidence: Map Annual holding-cost rate to one controlled record; cite Annual holding-cost rate in the working file. Remove duplicate annual holding-cost rate records before entry. Preserve original Annual holding-cost rate when a later Ordering workdays per year value changes.
Inventory control evidence: Treat Ordering workdays per year as separate evidence; never use Ordering workdays per year as a balancing amount. Separate observed ordering workdays per year from its planning assumption. Reconcile Ordering workdays per year units before evaluating them beside Annual unit demand.
Conditions that weaken the result
A repeatable economic order quantity process assumes that a versioned Days Inventory Outstanding Calculator run keeps the days inventory outstanding assumption visible.
The source case for economic order quantity shows that some decisions require evidence beyond the source fields. economic order quantity leaves inventory obsolescence unresolved beside Annual unit demand. Evidence beyond Annual unit demand is required. Conclusions about Ordering workdays per year remain separate from economic order quantity. The model relates Annual unit demand to Ordering workdays per year; future events affecting economic order quantity are not predicted. Attach those records outside the numerical model.
Within the documented economic order quantity case, keep one approved definition for recurring reporting and version it when the business intentionally changes scope.
What a change can and cannot mean
For the selected economic order quantity period, leave inventory reorder point outside this result until a Inventory Reorder Point Calculator case is prepared.
Read economic order quantity beside the source totals. The result describes the entered relationship but does not establish why that relationship changed.
From the controlled economic order quantity dataset, a point estimate is usually less informative than a reconciled baseline, current case, and labeled sensitivity range.
Build a repeatable review
Save economic order quantity with an owner, reporting date, source reference, and short conclusion. The conclusion should identify the next evidence request rather than overstate what the metric proves.
The review trail for economic order quantity supports this point: where two models share a field, retain one reconciled value and document any legitimate difference in treatment.
Questions before relying on the result
Can a target replace an observation?
The operating evidence behind economic order quantity means no. Keep targets visibly separate from actual or committed operating evidence.
How should manual adjustments be documented?
The owner of economic order quantity should remember that record the amount, reason, approver, source effect, and date beside the adjusted case.