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Both calculators run independently — change the inputs on either side to compare results.

Supplier Lead Time Variability Calculator

Quantify supplier lead time variability and calculate the maximum expected lead time at your chosen confidence level to size safety stock buffers accurately. Use this when onboarding new suppliers or reviewing safety stock policies after missed deliveries.

Average Lead Time (days)

Lead Time Standard Deviation (days)

Confidence Level

Fill in the required fields to see your result.

Supply Chain

ABC-XYZ Inventory Analysis Calculator

Classify inventory items by annual value (ABC) and demand variability (XYZ) to prioritize stock management. Use this when optimizing reorder policies, safety stock levels, or supplier negotiations across a large product portfolio.

Annual Usage Value ($)

Total Inventory Value ($)

Coefficient of Variation (%) (%)

Forecast Accuracy (%)

Fill in the required fields to see your result.

Key differences

	Supplier Lead Time Variability Calculator	ABC-XYZ Inventory Analysis Calculator
Category	Supply Chain	Supply Chain
Inputs required	3	4
Result	Maximum Expected Lead Time (days)	Classification Score (score)
What it does	Quantify supplier lead time variability and calculate the maximum expected lead time at your chosen confidence level to size safety stock buffers accurately. Use this when onboarding new suppliers or reviewing safety stock policies after missed deliveries.	Classify inventory items by annual value (ABC) and demand variability (XYZ) to prioritize stock management. Use this when optimizing reorder policies, safety stock levels, or supplier negotiations across a large product portfolio.