Which dimension Is defined in Automotive SPICE ®?

Automotive SPICE® is a two-dimensional framework designed to assess the capability of development processes. The first dimension is the Process Dimension, which contains the definitions of the processes used in automotive software development (e.g., engineering, management, support). The second dimension is the Capability Dimension, which provides a measurement scale for evaluating the maturity of each process. This scale consists of six capability levels, from Level 0 (Incomplete) to Level 5 (Optimizing), allowing for a standardized assessment of an organization's process maturity.

A. Resource dimension: Resources are managed within specific processes (e.g., MAN.3 Project Management) but do not constitute a fundamental dimension of the assessment model itself.

C. Objective dimension: Process objectives are integral components of the process definitions within the Process Dimension, not a separate, distinct dimension of the model.

D. Time dimension: Time is a critical project constraint handled by management processes, but it is not a structural dimension of the Automotive SPICE® framework.

1. VDA QMC. (2017). Automotive SPICE® Process Assessment Model, Version 3.1. Section 2.2, "The two-dimensional model", p. 10. This section explicitly states: "The model is two-dimensional. One dimension consists of processes (process dimension), the other one consists of a measurement scale for the capability of the processes (capability dimension)."

2. ISTQB®. (2021). Certified Tester Foundation Level Automotive Software Tester Syllabus, Version 1.0. Section 3.2.1, "Automotive SPICE® Process Reference Model and Process Assessment Model", p. 22. The syllabus states: "The PAM is two-dimensional. The first dimension is the process dimension... The second dimension is the capability dimension, which consists of six capability levels (0-5)..."

3. Messnarz, R., et al. (2013). A new process assessment model for safety critical systems development. Journal of Software: Evolution and Process, 25(6), 603-615. The paper describes the SPICE framework, stating, "ISO/IEC 15504 is a two-dimensional standard with a process dimension and a capability dimension." (Automotive SPICE® is based on ISO/IEC 15504). DOI: https://doi.org/10.1002/smr.578