Components on allocation: what to protect when supply is rationed

The situation

In the Institute for Supply Management's October 2026 Manufacturing PMI report, released on November 2, purchasing managers listed electronic components as in short supply for a 20th consecutive month, electrical components for a 16th, memory for a 10th, and printed circuit boards, copper and steel for a 4th. Supplier deliveries were slower for an 11th consecutive month, and the average lead time for production materials reached 87 days.

When a commodity stays short that long, suppliers stop promising and start allocating: they ship a share of what you ordered, confirm dates late, or confirm quantities lower than the order. For a plant, the risk is no longer one late order. It is a group of parts whose supply is rationed for months.

Step 1: find the parts that are actually on allocation

Most ERPs do not have an "on allocation" flag. You can find these parts from data you already have:

• Partial confirmations: open lines where the confirmed quantity is lower than the ordered quantity.
• Repeated date moves: lines whose promised date has changed more than once.
• Long quoted lead times: items where the supplier now quotes far more than the planned lead time (see lead-time drift).
• Commodity groups: items in the families ISM lists as short, such as electronic components, memory, circuit boards, copper and steel, if your item master has a commodity code.

Put these items in one list. That is your allocation watch list.

Step 2: compute cover on the watch list, against confirmed supply only

For each item, compute days of cover from usable stock and average usage. Then compare it with the next confirmed receipt, counting only confirmed quantities. On allocated parts, an unconfirmed quantity is a hope, not supply.

If cover runs out before the next confirmed receipt, the item is a shortage risk, even if the full order quantity looks sufficient on paper.

Step 3: decide what to protect first

When supply is rationed, you cannot protect everything. Rank the watch list by days of cover, shortest first, and for the top lines ask three questions with your planners:

• Which finished products use this part, and which customer commitments depend on them?
• Is there approved alternative stock, another site, or an alternative part?
• Can usage be slowed on lower-priority products to stretch cover?

WERISCO does not read bills of materials or customer orders today, so the first question stays with your planners and your ERP.

Step 4: widen the horizon and confirm in writing

• Look further ahead on allocated parts: compare cover with confirmed supply over a horizon at least as long as the current quoted lead time.
• Ask for confirmations on every open line, with quantity and date, and record them in the ERP the same day (see supplier order confirmations).
• Review the parameters of allocated items: a reorder point built on last year's lead time will keep ordering late.

Illustrative example, not a customer result

A plant tracks 40 electronic parts. Ten have partial confirmations. Of those ten, three have less cover than the time to their next confirmed receipt: a microcontroller with 6 days of cover and its next confirmed shipment in 18, a power module with 9 days and 21, a memory chip with 12 days and 15. Those three go to the top of the buyer's list, and planning is told today which products they feed.

Common mistakes

• Counting ordered quantities as supply when the supplier has confirmed less.
• Treating allocation as a one-off and not revisiting the watch list weekly.
• Raising safety stock on allocated parts that the supplier cannot deliver anyway, instead of protecting the most critical uses.

How WERISCO helps

WERISCO shows parts that will run short, ranked by days of cover, and the late or undated supplier orders behind them, with the evidence for each line, from your ERP or the exports you already run. It shows where reorder points were set for lead times your suppliers no longer quote. It does not predict allocations or supplier delays; it works from the dates and quantities you have, and your team decides what to protect.

Questions people ask

How is allocation different from a late order?

A late order is one line behind its date. Allocation is a supplier rationing a commodity across customers, often for months, with partial and moving confirmations.

Should I order more of allocated parts?

Only with care. Larger orders on allocated parts often get the same share, and they inflate stock once supply recovers. Protect critical uses first.

How often should the watch list be reviewed?

Weekly while the commodity stays short, and daily for the items at the top of the list.