Which dimension Is defined in Automotive SPICE®?

In principle, automotive SPICE® has two dimensions: the process dimension and the process capability dimension. The processes in the process dimension are based on the ISO 12207 that has been extended and modified with automotive-specific additions.

https://industryforum.co.uk/resources/automotive-spice-by-vda/#:~:text=Scope%20of%20Automotive%20SPICE%C2%AE,modified%20with%20automotive%2Dspecific%20additions .

The Capability dimension is defined in Automotive SPICE®. Automotive SPICE® is a model for the assessment and evaluation of software process capability in the automotive industry. The Capability dimension provides a description of the capability level of the software process, which is determined by the process capability maturity level (CMM) and the process capability level (PCL). The Capability dimension includes aspects such as the definition of processes, the availability of resources, the measurement and analysis of processes, and the improvement of processes.

Source: ISTQB Certified Tester, Automotive Software Tester (CT-AUT) Study Guide.