# Supplier Lead Times: Measure Arrival to Usable Stock

Canonical: https://millbase.ca/blog/supplier-lead-times-measure-arrival-to-usable-stock
Author: [Coby Birenbaum](https://www.linkedin.com/in/cobybirenbaum/)
Published: 2026-10-19
Updated: 2026-10-19
Archive edition: 2026-05-01

A supplier lead time should reflect when the shop can actually use the material.

A supplier lead time should reflect when the shop can actually use the material. Delivery at the dock may still require inspection, sorting, or paperwork. Measure the full interval relevant to production and distinguish promises from observed performance.

## Capture comparable dates

- Record order placement, supplier confirmation, dispatch where available, receipt, and release to stock.
- Use consistent working-day or calendar-day definitions.
- Separate stocked items from custom or imported material.
- Track partial deliveries and the date the required quantity becomes usable.

## A planning example

A hypothetical supplier delivers after five working days, but inspection and discrepancy resolution take two more. Planning with a five-day lead time leaves production exposed. The relevant availability interval is seven working days for that case.

## Review the variation

Look beyond the average. A material that usually arrives quickly but occasionally misses by a week may need a different contingency than one with a longer, stable lead time.

## Related reading

- [Vendor Scorecards for Cabinet Materials and Hardware](https://millbase.ca/blog/vendor-scorecards-for-cabinet-materials-and-hardware)
- [Inventory Management Software for Woodworking: What to Track First](https://millbase.ca/blog/inventory-management-software-for-woodworking-what-to-track-first)

## Definitions and further reference

- [Oracle: inventory management explained](https://www.oracle.com/scm/inventory-management/what-is-inventory-management/)

## How Millbase can help your shop

### Connect material records to the cabinet job

When a component shortage or material change affects a job, start with the recorded stock and the work it supports. [Millbase inventory](https://millbase.ca/#inventory) keeps quantities, material costs, receipts, stock lots, and usage history together. Use [project tracking](https://millbase.ca/#projects) to review the associated labour and material costs, then reconcile the physical material before making a new commitment.

Ask the [Millbase AI agent](https://millbase.ca/#how-it-works) a question grounded in your workspace records. For example: *“What inventory records do we have for this material, and what usage is recorded against this project?”* You can select a project or worker, ask follow-up questions, and request [supported reports and CSV exports](https://millbase.ca/#insights).

Use the answer to locate the relevant records and investigate the exception. A physical count, approved specification, or supplier confirmation still establishes facts that have not been recorded.

## Explore the wider topic

For the broader workflow and decisions behind this guide, read [Production Lead Time vs Cycle Time in Woodworking](https://millbase.ca/blog/production-lead-time-vs-cycle-time-in-woodworking).

## Frequently asked questions

### Should the supplier's quoted lead time be ignored?

No. Keep it as a promise to compare with actual performance, and confirm current conditions for critical orders.

### Do partial receipts shorten lead time?

Only for the quantity that can genuinely support the planned work. A missing critical component may still block release.