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How Can We Forecast Each Restaurant's Sales Week by Week Instead of Guessing From Last Year?

Restaurant groups forecast site sales from last year plus a percentage, so rotas and orders miss. We build weekly site forecasts that learn from real trading.

Updated 3 min readBy SpiderHunts Technologies

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Quick answer — TL;DR

Most restaurant groups set site budgets once a year from last year's sales plus a growth figure, and GMs forecast their own weeks from memory. The forecasts miss weather, events, school holidays, new openings nearby and bookings already on the system. We build a weekly forecast by site and daypart that uses trading history, bookings, local events and weather, which GMs can adjust and head office can compare with budget.

Last year plus a bit

The budget for each site was built last autumn: last year's weekly sales, plus a growth percentage, adjusted for a refurb. It is now wrong for half the sites. One lost trade when a new office block delayed opening. Another is busier because a theatre reopened across the road. The GMs know this and forecast their own weeks from experience, in their heads or a notebook, and rota and order on that basis.

At head office, the budget is still the only formal forecast. So every week the variance report shows the same sites ahead or behind for the same known reasons, and nobody has a better expectation to work to.

Why forecasting stays stuck

  • The annual budget is treated as the forecast, even when things have changed.
  • Each site's history is in its own EPOS, not in one place a model can learn from.
  • Bookings, which tell you much of the week in advance, are not joined to sales history.
  • Local events, weather and school holidays are known but never recorded against trade.
  • GMs forecast differently from each other, and nobody writes the forecast down.

What rough forecasts cost

Rotas built on a poor forecast overstaff quiet shifts and understaff busy ones. Orders built on it cause waste or run short. The central kitchen produces too much or too little. Head office cannot tell a site with a real problem from a site with an unrealistic budget. And GMs lose faith in the numbers they are judged against.

How we build site forecasts

  1. We bring together sales history by site, day and daypart from each EPOS into one store.
  2. Bookings from your reservation system are added, so the forecast knows how many covers are already committed.
  3. Known drivers are recorded against each site: school holidays, bank holidays, local events, sports fixtures, weather forecasts and changes such as a refurb or a new competitor.
  4. A forecasting model predicts sales and covers by site, day and daypart for the coming weeks, and learns from how well it did last time.
  5. GMs see the forecast for their site and can adjust it with a reason, such as a large party or a road closure. Both the model's figure and the adjusted figure are kept.
  6. The forecast feeds the rota and ordering views, and head office compares forecast, budget and actual in one report.
InputWhy it matters
Trading historyThe base pattern by day and daypart
Bookings on the systemCommitted covers for the week ahead
Events and holidaysKnown spikes and dips
WeatherTerraces, beer gardens, footfall
GM adjustmentsLocal knowledge the data cannot see

No forecast is perfect, and we show how accurate it has been at each site so people know how much to trust it.

Planning the week with it

On Wednesday each GM sees next week's forecast by day and daypart, checks it against what they know, and adjusts one or two days. The rota and orders are built from that number. Head office sees the whole estate's forecast beside budget, and a site that is permanently behind budget for a known reason can be re-forecast rather than argued about every week.

Does this sound like your planning?

  • The annual budget is the only forecast you have.
  • GMs forecast from memory and never write it down.
  • Bookings are not used to predict the week's sales.
  • Weather and local events are never recorded against trade.
  • The same budget variance comes up every week for known reasons.

FAQ

Frequently asked questions

The questions readers ask us after this guide.

Still have a question?

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Ask about your project

How much history do we need?

More helps, but a forecast can start with whatever history your EPOS holds, and it improves as it runs.

Does it replace our budget?

No. The budget stays as your annual target. The forecast is your best current view of what will happen.

Can GMs override it?

Yes, with a reason. Both figures are kept, which shows over time whether adjustments improve accuracy.

What drives the cost?

The number of sites and EPOS systems, whether bookings and weather are included and what it feeds, such as rota or ordering.

What do you need from us?

Access to EPOS and booking systems, your budgets and a list of the local factors your GMs already watch.

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