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financial

Days Inventory Outstanding

Average number of days inventory is held before sale.

Definition

Average number of days inventory is held before sale.

Why it matters

DIO translates inventory performance into the language of cash and working capital.

Formula

(Average Inventory / COGS) x 365

Example

Average inventory of $3M against $12M COGS gives about 91 days.

How to interpret it

Read alongside payables and receivables days to understand the full cash cycle.

How to improve it

Reduce excess and obsolete stock, shorten replenishment cycles, improve supplier flexibility.

Common mistakes

Comparing DIO across businesses with different sourcing footprints.

Related KPIs

Related SupplyChain.tools

Run the numbers on SupplyChain.tools - this page covers the management decision.

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