Product ranges usually contain an option priced well above the rest that sells in small volumes. Its commercial purpose is frequently to change how the other options are read.

Choice is made by comparison

Deciding between products means comparing them against each other rather than against an absolute standard of value. The set on offer therefore determines what counts as expensive.

Adding a high option to a range does not change any other price, but it changes where the middle of the range sits. The former top option becomes the moderate one.

Because the comparison is relative, a shopper who would have hesitated at the previous top price can now select it as the sensible middle course without feeling extravagant.

The decoy needs to be plausible

An implausible top option does not work. If the premium item looks arbitrary or unrelated to the rest of the range, shoppers exclude it from the comparison entirely.

It therefore needs real differentiating features, genuine availability and a price that can be justified by its specification, even if very few buyers will conclude that it is worth paying.

That requirement gives the practice a natural limit. Maintaining a credible premium option costs money in development, stock and shelf space, so it must earn its place through its effect on the range.

Good, better and best is the standard form

Three-tier ranges are common because they give the middle option two reference points, one on each side, and the middle is where most volume is intended to land.

The lowest tier defines what a basic version looks like and usually omits features that shoppers discover they want. Its role is to make the middle feel like a small step up.

The top tier defines the ceiling. Between them, the middle option is described by what it is not: not the stripped-back version, not the one that costs considerably more.

Asymmetric options steer the decision

A related arrangement uses options that are hard to compare directly, such as different sizes at different unit prices, so no single option is obviously best on every measure.

When one option is clearly better than another on every dimension, it draws attention to that comparison and carries the decision, which is why deliberately dominated options appear in menus and subscription tables.

The mechanism is the same in both cases. The choice is being shaped by what surrounds the option rather than by any change to the option itself.

Reading a range for what it reveals

The presence of a rarely bought premium tier tells a shopper something useful: the range has been designed as a set, and the intended destination is probably not the top.

Comparing each tier against outside alternatives rather than against its neighbours removes the framing, because outside options were not chosen to make anything look reasonable.

Working out which specific features are missing from the cheaper tier is usually more informative than the price gap, since that gap was set with the comparison in mind.