Indeed, the Rähmbauweise is a later development, and the oldest medieval buildings are Ständerbau.

Rähm might be translated as plate, so this style could be referred to as Plate-building style
Ständer would e translated as post, so it could be translated as post-built style. The difference between them is that in Ständerbau, the posts extend from the foundation to the roof, but in Rähmbau they are interrupted.
(weise is a cognate of the English word wise or ways, like in cross-ways. It basically means style)

Ständerbau developed during the early middle ages, and Rähmbau seems to have replaced it in most regions by around 1400 to 1450, 1500 at the very latest. Some of my findings suggest that the Rähmbau style caught on much earlier in Switzerland where it quickly became the dominant style where timber framing was done.

In the context of this history, we need to examine 2 other styles.

Blockbau, which is simply the German term for log building. Blockbau is still used in alpine regions, notably in places like the Oberland region of Switzerland and in Austria. This style uses squared timbers, often with complex corner joints.

Ständerbohlenbau, which sits sort of between timber framing and log building. It is built as a timber frame and between the timbers thick boards are stacked. This style was dominant in the Swiss countryside up to the 1500's, and may indeed be the forerunner of Rähmbauweise, considering that such buildings are in fact built with a platform method. This style has survived into the modern day in Switzerland, where the thick (often stated as being 'thick as an arm') solid wood boards are replaced by processed sandwiches consisting of exterior layers of wood with an insulation material in the middle. With this style, additional triangular bracing is often applied to the exterior of the frame, half lapped into the framing members. This buildings are noted for being remarkably sturdy, and generally the oldest surviving buildings in Switzerland tend to be of this type.

here is a good image from google showing this style:


and another