Tarnwick

Data-backed supply chain decisions, in minutes.

Tarnwick is supply chain software built around your business. It analyses your stock, orders, containers and sales, then recommends the best action for each decision: protect availability (service level), reduce cost, or a blend of both.

Book a free consultationSee it working

The framework is already built. Each module is customised and developed around your files and rules.

The Tarnwick overview page: a 26-week stock runway with sales at risk marked in red

One version of the truth, in minutes.

Lost time and poor decisions are among the costliest things in a supply chain. Tarnwick analyses all of your data and gives data-backed suggestions for every module.

In minutes

Work that takes hours or days in spreadsheets is done in minutes, so decisions are made sooner.

Backed by data

Each suggestion shows the numbers behind it, so it can be checked and trusted.

One view for everyone

The same numbers and rules for every department, instead of competing opinions and separate spreadsheets.

Every container, from factory to DC, on one map

The PO Dashboard shows every purchase order and container on its real route, round the Cape to the UK port, coloured by whether the stock inside will arrive in time. Below the map, pick a container and see the SKUs inside it, their weeks of cover and the date you can act on.

Arrives with coverCover is thin on landingStock-out before it landsDemo data: made-up business, made-up vessels.

Open a container

Each container holds several articles. Slide the delay and see which ones run out before it lands, and the date to act by.

Most stock problems show up weeks before they cost you sales.

Your files do not agree

Stock, POs and several forwarders each use their own SKU codes, dates and layouts. Someone rebuilds the picture by hand every week.

Stock-outs hide real demand

Sales dip when you run out, so last year's numbers teach the forecast the wrong lesson. Tarnwick corrects for the weeks you were out.

Excess arrives unnoticed

POs placed months ago land when you no longer need them. Tarnwick shows the weeks of cover (WoC) each PO will land with, before it leaves the factory, so you can rephase it.

Try it

Three problems, three things to move.

These are the same pictures you get in the app, running on made-up numbers for a demo business. Move the sliders.

Excess arrives unnoticed

Push an order back and watch the stock

Slide the ex-factory date, or say how many weeks of cover to leave, and see every article on the PO, what else lands on it, and the open-to-buy month it moves to. Orders that share a container with other lines are flagged, with the departments that still need to agree.

Spot the gap months before it hits

Place the order and see what it protects

Add an extra order or pull a shipment forward and the runway redraws: the run-out date, the sales you would lose, and what the change protects.

Stock-outs hide real demand

See what a stock-out does to next year

A product that ran out in its peak looks like it sold less. Switch the forecast between what sold and demand corrected for the stock-outs, and compare the error.

From half a day a week to half an hour

By hand, every week

  • Collect the stock, sales, purchase order and shipping files
  • Match product codes across them
  • Fix dates, duplicates and typos
  • Rebuild the formulas and charts
  • Check it, then decide what to do

Half a day or more

With Tarnwick

  • Your files arrive, or your own script collects them
  • They are combined and checked, and every fix is logged
  • You open one page and see what to do first
  • It refreshes whenever your files change

About 30 minutes

Typical figures from our experience. Your numbers will vary.

Spot the gap months before it hits

Open any SKU to see its runway, the order-by date against its lead time, and what each fix would protect.

9 Aug
Order by
The latest date to order and still land before stock runs out. In the demo it has already passed, so only expediting can help.
26 Oct
Runs out
About 335,000 units, £9.5m of sales missed before help arrives.
20 Oct
Containers land
The first containers land, one of them 8 days behind its original date. Nobody had to chase to find out.

Demo business with made-up data.

Product runway with what-if sliders

Start with the basics. Add modules for the decisions that cost you most.

Stock visibility

Where every unit is, by DC, category and SKU, rated healthy, low, at risk, overstocked or dead.

PO Dashboard

Every container and purchase order (PO), from multiple forwarders, on one map and timeline with late ETA warnings.

Demand and forecasting

Demand corrected for past stock-outs. Works on its own, or alongside the forecast you already have.

More modules, built for you

PO priorities and container booking, the container stack and D&D, DC-to-DC rebalancing, slow-movers and dead stock, launch critical path, and rephasing POs with the effect on OTB. Each runs on your rules, on the same engine.

See all modules

Your process, your rules

Pallet sizes, safety stock and WoC targets, thresholds, what each DC is for. Every rule is a setting with an owner. Pick a profile to see the same engine give different answers.

Stores and online. Standard pallets with a small overhang allowance.

Pallet types across 5,000 articles: 4,274 single, 723 overhang, 3 double

1,559
stock moves between DCs
145
SKUs tight against a launch date
£942k
of POs still cancellable

Demo data. Only the rules changed between profiles.

The Rules and settings page comparing three rule profiles

Three ways to run it

Managed

We refresh it for you.

  • Weekly refresh
  • Almost none of your time. You send us the files
  • Best for owners who want it done for them

Self-run

Your own script refreshes it.

  • Daily or weekly
  • Minutes a week. Keep the files current
  • Best for teams with a tidy data routine

Managed, then handed over

Most customers start here.

  • Weekly at first, then your choice
  • Almost none, then minutes
  • Best for getting the layout right first

How it works

Start with a free consultation.

A 30-minute video call. We look at your files and tell you honestly whether we can help.

Book a free consultation