Peak Season Prep: The 12-Week Warehouse Countdown

By the third week of September, most warehouse managers are still in recovery mode from the summer. Dispatch volumes are manageable, the racking looks tidy, and nobody has mentioned Black Friday yet. That quiet is a trap.

The twelve weeks between early September and late November are not twelve equal weeks. The first four are your only real chance to prepare. Weeks five through eight are when small problems become expensive ones. The last four weeks you are reacting, not planning.

Weeks 1-4: Fix the things you already know are broken

Every warehouse has a list of known issues that get tolerated during quieter periods. A pick face that is perpetually undersized for a fast-moving SKU. A goods-in bay that backs up whenever two lorries arrive at once. A scanning process that relies on one person who happens to know where everything is.

September is the only time you can address these without causing a service failure. Make a list. Not a wishlist, a list of the specific failures that slowed you down last November. Pull the data from your WMS if you have it. If not, ask the shift supervisors, because they remember.

Then prioritise ruthlessly. You will not fix everything. Pick the three or four constraints that caused the most delays last year and work backwards from them to understand what actually needs to change.

Weeks 5-8: Staff, space, and stock positioning

Temporary staff are expensive and slow to get up to speed. If you need seasonal workers for November, you should be recruiting in late September and onboarding in early October. Anyone starting in November will cost you more per pick and more in supervision time than someone who has had four weeks on site.

Space is the other pressure that sneaks up on you. Inbound volumes start climbing in October as suppliers push stock ahead of the season. If your layout was not designed with that buffer in mind, you will end up with stock in the aisles, which slows everything else down.

Walk the warehouse in week five and ask: where will the overflow go? If the answer is “we’ll figure it out,” that is the problem. Allocate specific zones for seasonal overstocking now, before the pallets arrive.

Stock positioning is worth a morning of someone’s time at this stage. Fast movers should be in the most accessible pick locations. That sounds obvious, but slotting decisions made during quieter periods often drift over time and rarely get reviewed before peak. Check yours.

Weeks 9-10: Test under pressure before the pressure is real

By week nine you should have the bulk of your seasonal staff in place and your processes updated. This is the point to run a stress test, not a formal exercise, just a week where you push volume slightly above forecast and see what breaks.

You are looking for the handoffs that slow down, the points where people default to workarounds, and the managers who are carrying too much knowledge in their heads. Any process that depends on one person knowing the right thing to do is a risk during peak. Document it or cross-train for it before week eleven.

This is also a sensible point to check your high-use equipment. Conveyor sections, charging stations for powered kit, label printers. A broken printer on a Monday in November is not an emergency you can absorb.

Weeks 11-12: Protect the plan

The fortnight before Black Friday is not the time to introduce anything new. Freeze your processes, your layouts, and your system configurations. If something genuinely needs changing, it needs sign-off from someone senior enough to take responsibility for the risk.

Your job in these two weeks is to make sure everyone knows what they are supposed to do, that the plan is visible to all shift supervisors, and that you have a clear escalation path when things go wrong, because things will go wrong.

Brief your team on targets. Not just volume targets, but accuracy targets and the specific failure modes you most want to avoid. People work better when they understand why a particular thing matters.

If you are stepping back and realising that the problems you keep patching in September run deeper than process, the first useful step is understanding where the losses actually sit. The losses tool takes about twenty minutes and often changes the conversation about where to focus effort over the next twelve weeks.

For operations that want a more structured framework for working through these priorities without turning it into a project, the Cadence Six method gives you a repeatable approach. And if you want a consistent way to run the week-five walk-around, the 5S audit tool is a straightforward starting point for recording what you find.

The next twelve weeks will go one of two ways. The difference is usually what you do in the first four.