Shop-Along Sample

Voltline, a fictional sparkling energy drink, sells well in its home stores but loses shoppers at the shelf. Its scan data shows the loss without the reason. So a researcher went shopping with 24 category buyers: 18 on real trips in three grocery stores and 6 on a delivery app over screen share. We watched the path, timed every stop and noted each can picked up and put back. A short interview followed at the shelf, while the choice was still fresh. To size what we saw, we added 120 quick intercepts at the energy drink set.

Shop-alongs

18 in store, 6 online by screen share

Shelf intercepts

120

40 per store, 3 minutes each

Median time at the set

0 sec

shop-alongs, in store and online

Bought their usual brand

Who we went shopping with

Bought a sparkling energy drink in the past two weeks, age 21 to 54
Already planned a trip to one of the three stores this week
Quota: 7 Voltline regulars, 13 competitor regulars, 4 who rotate
Mix of trips: weekly stock-ups and quick top-up trips
Online: 6 who order groceries on a delivery app at least twice a month
Out: works in retail, beverage, advertising or research

How a shop-along runs

Meet at the door. Two warm-up questions, then the shopper leads.
Follow, do not steer. The researcher stays a step behind and logs each stop and its seconds.
Note every touch. Picked up, turned over, put back, swapped.
Online: the shopper shares a phone screen and thinks aloud, and we record searches and taps.
Shelf interview, 6 to 8 minutes, right after the choice.

Questions at the shelf

What did you come in for today?mission
Walk me through what just happened here.replay
You picked that one up. What were you checking?touch
What made you put it back?reject
Do you usually buy the same one?habit
How much does price matter in this aisle?price

The last two questions are asked on purpose. The answers are compared with what we watched on the Said vs did tab.

Shopper roster Observed

#	Shopper	Where	Trip	Usually buys	Bought	Sec at set

First names are invented. Store A is a large grocery store, Store B a supercenter, Store C a neighborhood grocery. "Sec at set" is the time spent in front of any energy drink display, from the researcher's log.

The 120 shelf intercepts size what the shop-alongs showed. A researcher watched each shopper at the energy drink set, then asked a few questions after the choice. Voltline gets picked up almost as often as the leader and bought half as often. More than half of the Voltline cans picked up went back on the shelf.

Voltline picked up

41 of 120

34%, second to Kestrel at 43%

Voltline bought

18 of 120

15%, third of five brands

Pick-up to purchase

44%

lowest of the five, others 55% to 74%

Voltline put back

of 65 put-backs in the set

Looked, picked up, bought · n=120 Observed

Stopped and lookedPicked upBought

Shoppers can look at and pick up more than one brand, so those rows do not add to 120. Each shopper bought at most one: 99 bought one of these five brands, 9 bought another brand and 12 left without an energy drink.

Why Voltline went back · 23 put-backs Observed

From the intercept question "What made you put it back?" and the researcher's notes on what the shopper did next, one main reason per put-back.

Purchase share at the set

The decision moments Observed

From the end of the aisleMost shoppers walk straight to a brand they named before they reached the set. The rest scan from the middle shelves outward.

77 of 120 (64%) went straight to a named brand

Eye levelThe hand goes to the two middle shelves. Voltline sat on the bottom two shelves in Stores A and B.

117 of 164 pick-ups (71%) from the middle shelves

The turn of the canShoppers turn the can over to read the back. Caffeine is the first thing they look for, then sugar.

46 of 120 (38%) turned a can over

Price per canOn multipacks, shoppers do the math on the tag. A 12-pack that looks cheaper per box can be dearer per can.

35 of 120 (29%) checked the shelf tag

Basket or shelfThe moment Voltline loses. A can in the hand is a sale half won.

65 of 164 pick-ups (40%) put back

Aisle 7 shelf, Store A Illustrative

Each block is one facing. Voltline has seven facings, all on the bottom two shelves. Kestrel holds the two middle shelves, where 71% of pick-ups happened.

I didn't even see they had the black cherry one down there. I just grabbed what was in front of me.Intercept, Store A, Kestrel buyer

Two hundred milligrams? That's a lot for the afternoon. The front just says "clean energy".Intercept, Store B, put Voltline back

The readout turns each loss into a fix that a sales team can take to a store. Every fix is tied to what we saw, and ranked by how many sales it touches.

Recommendation

Win the turn
of the can

Voltline does not have an awareness problem at the shelf. Shoppers find it and pick it up. It loses at the turn of the can and at the tag, and it is missing where quick trips happen. Put the caffeine on the front, move to eye level, get singles into the front cooler and show price per can. Then test the new set in six stores before a wider rollout.

Shelf fixes, in order

Put the caffeine on the front of the canThe most common reason for a put-back. Shoppers turned the can to find it and some did not like a surprise of 200 mg. A clear "200 mg" or a lighter 120 mg option on the front answers the question before the can is turned.

9 of 23 Voltline put-backs

Pack

Move to the middle shelves71% of pick-ups came from the two middle shelves. Voltline was on the bottom two in Stores A and B. Ask for at least one eye-level shelf, next to Kestrel.

117 of 164 pick-ups at eye level

Shelf

Get singles into the front coolerQuick-trip shoppers spent a median of 13 seconds at the set, and half of them bought from the cooler. A Voltline regular bought Kestrel because Voltline was not in it.

missing from 2 of 3 front coolers

Cooler

Show price per can on the multipackThe 12-pack box price looked fine. The per-can math, done on the shelf tag, sent shoppers to the competitor's promotion.

6 of 23 put-backs

Tag

Make flavors easy to tell apartThe cans share one silver design with small flavor type. A bold color band per flavor would end the "which one is this" put-back.

5 of 23 put-backs

Pack

Reach the first screen onlineVoltline shows up 14th for "energy drink" and the first screen holds 8. A sponsored slot or better product titles would put it in view.

3 of 4 online searchers never scrolled

Online

What is already working

Voltline gets noticed. 74 of 120 stopped and looked at it, and 41 picked it up.
New flavors pull switchers. Both shoppers who switched to Voltline did so for a flavor marked "New".
Regulars who find it, buy it. All three regulars who found their flavor in its usual place bought it.

Test it next

New set in 6 stores, 6 matched controls4 weeks
Fixes 2, 3 and 4 at shelfno new cans needed
Repeat 60 intercepts in test storesput-backs, pick-ups
Pass mark: pick-up to purchase over 55%from 44%

Where this study could mislead

24 shop-alongs show why. The 120 intercepts size the pattern; they do not project to all stores.
Three stores in one region. Shelf sets differ by retailer, so we would check each key account before rolling out.
Being watched changes shopping a little. Shoppers took longer with a researcher beside them, so we lean on the unaccompanied intercepts for time and counts.