How to differentiate between residential, commercial, and industrial shops?

How can I tag a node in OSM to differentiate between shops that sell goods that cater to only one of the following types of customers:

  1. Residential
  2. Commercial
  3. Industrial

For example, let’s consider a shop that sells ovens.

A single home owner is going to be looking for a shop to buy a residential oven. A residential oven is less than one cubic meter. It fits under the counter in a home. It has a fairly inexact range of temperatures and few features. These types of ovens work fine for most homes, but it’s not going to suffice for a business that needs to bake 700 loaves of bread per day.

A bakery is going to be looking to be looking for a shop to buy a commercial oven. A commercial oven is going to be fairly large, possibly a few cubic meters. It will have finer control of its temperatures and have some advanced features, such as steam control. This would be too large & expensive for a single home, but it’s not going to suffice for a business that needs to produce tens of thousands of loaves per day.

A large-scale industrial bread manufacturer is going to be looking for a shop that can help them build an industrial oven. An industrial oven is going to be extremely large, likely with a continuous-feed convener running loaves of bread through it constantly. It’s going to need a host of computers to maintain its numerous heating elements, sensors, and advanced features.

Here, ovens is just an example. In general, almost every type of shop= that can be tagged on OSM can be split into these categories.

How can OSM contributors differentiate between shops that sell residential, commercial, and industrial goods with tags?

Note: This post is copied from the corresponding post on help.openstreetmap.org

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There is some use of shop=trade, but to be honest it can be tricky, especially when there are a range of shops that do everything from b2c, a bit of b2b (perhaps with a showroom), and purely office-based b2b (no customers on premises, which most people would say was not a shop).