In message <p1r*
9d...@news.chiark.greenend.org.uk>, at 22:45:27 on Mon,
11 Sep 2017, Theo <
theom...@chiark.greenend.org.uk> remarked:
>Andrew May <
andrew...@hotmail.com> wrote:
>> Which all rather goes to reinforce the them and us of the area. This is
>> not an area which is part of Girton, or even part of Cambridge. It is a
>> distinct and separate entity, part of the university with university
>> halls, accommodation for university staff, a university primary school
>> and university departments. All controlled by the university. Even the
>> 'public' spaces. Nothing for the plebs and never the twain shall meet.
>
>One thing to realise is that Sainsbury's don't know what their audience is
>actually going to be. They have Clubcard data,
Nectar, actually; and that's far less widely used by their customers
than by Tesco Clubcard.
>of people who live within a certain radius and the things they buy. But
>the data for people who live closest and are likely to shop there most
>frequently is entirely absent - there are no Clubcard holders within
>0.x miles because it was previously a field. So they basically have to
>guess, based on the demographic that they expect and probably inference
>from similar stores elsewhere.
But even so, there are so many Sainsbury's Local opening up (several in
Cambridge in recent memory) that they (a) have other sources of info and
(b) usually have a cookie-cutter store.
>That means two things:
>
>If you want them to stock a wider range of something, go buy what they have
>because it'll train the algorithms that there is demand for that thing. Now
>is a very good time because the algorithms are starting from a clean sheet.
My observation from what sells and doesn't (clearance shelves are one
clue) is that individual stores aren't tuned as much as you assume they
are.
>In some areas they will guess wrong, and overstock. That would be an
>excellent opportunity to hover around the 'reduced to clear' section in a
>week or two.
Perhaps, but without the butcher, fishmonger etc counters, the way
Sainsbury's clears stuff there'll be thinner pickings.
>(or equivalently longer timeline for storecupboard goods) For instance,
>they might have projected from the Sidney St store that they sell lots
>of champagne (May Week, etc).
I don't think they even do that. Shops near schools are routinely
overflowing with un-bought lunchtime sandwiches during half term week
for example.
Tesco are generally regarded as having better data on their shops and
customers, yet year after year at Ely they overstock on mince pies and
brandy butter(s) and have to clearance them (palette loads of pies) in
the early New Year. While a busy store, perhaps Eastern Europeans don't
"do" mince pies?
On the other hand, they do buy loads of sliced white bread on a Friday
evening, and week after week, month after month, the store sells out
completely that day. And yet, they don't adjust their stocking.
>Postgrads don't do May Week in the same way and wouldn't lug it into
>town anyway, and so I'd be willing to bet they'll want to shift that
>champagne when they realise it isn't selling.
The only time I've *ever* seen champagne on clearance at a supermarket
was at a Tesco Extra store (Peterborough I think) the week after Xmas,
when they had lots of own-brand[1] Xmas-labelled champagne unsold. So
either their algorithm got it spectacularly wrong, or it's not as
evidence-based as we assume.
[1] Which tells another story. Champagne on the shelves will typically
belong to the wholesaler, not the supermarket (except for own-brand) and
if it's not selling the shop will simply send it back. However, the
wholesaler will usually keep it in the store (and maybe have a "10% off"
sale) because it's more likely to shift if it's on a supermarket shelf
than in his warehouse.
--
Roland Perry