Less predictable lead times: the silent new risk for retail in 2026

The silent new risk in retail: less predictable lead times

We are not in a logistics crisis. But we are not in stability either. Lead time — the supplier's delivery window — has returned to seemingly normal levels, and that is exactly the problem: lead-time variability has become the new silent risk for any business that manages inventory.

Over the past few years the problem was obvious: collapsed ports, skyrocketing container costs and delivery times that doubled without warning. Today the narrative is different. The general feeling is that "everything is back to normal". But normal does not mean stable.

Variability, not duration: the real problem in 2026

The problem is no longer that lead times are long. In many sectors, the average delivery time looks reasonable:

• Suppliers deliver "in general".
• There is no visible crisis.
• There are no alarming headlines.

But when you analyse the history a far more worrying pattern emerges:

• Variations of 15% to 30% between orders.
• Cumulative micro-delays.
• Schedule changes not always communicated.
• More fragmented production runs.

It is not chaos. It is variability. And poorly managed variability is paid for with inventory and cash.

Why variability is more dangerous than duration

A stable 6-week lead time is perfectly manageable:

• Adjust coverage precisely.
• Reduce safety stock.
• Optimise tied-up capital.

But a lead time fluctuating between 5 and 8 weeks creates structural uncertainty. And many companies react the same way:

They buy more to feel safe.

The result:

• Higher average stock.
• Lower turnover.
• More tied-up capital.
• Future cash-flow tension.

Not because they sell badly, but because they over-protect.

The most common mistake in inventory management in 2026

Many companies are still using the same safety margin as 3 or 4 years ago, without reviewing whether:

• The supplier has changed pace.
• Production capacity has become less stable.
• Demand has become more volatile.
• The commercial cycle has shortened.

Most measure the average lead time. Very few measure its variability. That difference is critical.

What companies should be measuring today

The question is no longer: how long does the supplier take? The right questions are:

• How much does the lead time actually vary between orders?
• How often do deviations occur?
• What is the standard deviation of the delivery time?
• What impact does that variability have on my optimal coverage?

If variation exceeds 20%, the risk is no longer operational: it becomes financial.

What the strongest companies are doing

The most mature companies are not buying more:

• Measuring lead-time variability by supplier and by SKU.
• Dynamically adjusting their safety margin.
• Working with scenarios, not a single forecast.
• Reviewing coverage more frequently.

They understand that the environment is not chaotic: it is variable. And what is variable demands finer systems, not more stock.

Final thought: from a logistics decision to a liquidity decision

Today's risk is not visible like in 2020. There is something more subtle: lead times that look normal, but are no longer fully predictable.

And when the lead time stops being stable, the purchasing decision stops being a logistics matter and becomes a strategic liquidity decision.