workdaykit. A little less busywork
Home / Inventory & capacity / Tool 15
INVENTORY & CAPACITY / 15

Order lead-time estimate

Estimate completion in working days from backlog, order size and daily output.

Your starting point

LOCAL · PRIVATE

Sample values are filled in. Change them to make this your own.

A little more clarity

RESULT

Your result will appear here.

Run the sample to see how it works.

FROM INPUT TO ANSWER

Use this tool

  1. Enter backlog ahead of this order and the new order quantity.
  2. Set achievable units per working day.
  3. Add sequential processing and delivery working days, then calculate.
WHAT THE NUMBERS MEAN

Reading your result

Production is rounded up to a whole working day. Processing and delivery are then added; the result is a duration, not a promised calendar date.

UNDER THE HOOD

How this works

Ceiling((backlog + order) ÷ daily capacity) + processing + delivery.

Use the units shown beside each field. For monetary amounts, use one currency throughout; calculations do not convert currencies. Results normally display up to two decimal places. Nonzero values below 0.01 use up to six significant digits; values below 0.000001 use scientific notation (for example, 1E-7 means 0.0000001). Rankings use unrounded values, so displayed scores can look equal without being tied. CSV downloads retain numeric precision. Monetary rounding uses half-away-from-zero. Inputs or results beyond supported precision are rejected.

BEFORE YOU USE THE RESULT

Assumptions & limits

All added stages are sequential. Working-day count only: no date, holiday or carrier-service prediction.

Required numeric fields reject blank, malformed and out-of-range values; negative values are allowed only for inventory position. Whole quantities are validated where units must be indivisible.

Results are planning aids based on the values you enter. Check important decisions and documents before using or sharing them.

Keep things moving.

More in this collection ↗
11 / 30

Inventory days of cover

Estimate how long current usable inventory can serve your average daily demand.

Inventory & capacity
12 / 30

ABC inventory classification

Rank SKUs by annual consumption value and highlight the largest contributors.

Inventory & capacity
13 / 30

Production bottleneck

Compare serial workstation capacities and identify the limiting step.

Inventory & capacity

Take the next step.

Browse practical guides ↗
Warehouse aisles with boxed inventory stored on shelvesPRACTICAL GUIDE

Reorder point and EOQ answer different questions

Keep replenishment timing separate from order quantity, then check packs, lead times and inventory position.

Read the guide Stacks of packaged stock inside a warehousePRACTICAL GUIDE

A net-zero stocktake can still hide a real problem

Read shortages, overages and absolute value variance before adjusting a stock record.

Read the guide