Comprehensive and Detailed In-Depth Explanation:

ISO 9001:2015 promotes the process approach, which allows organizations to structure their activities into interrelated processes. This approach helps ensure that processes effectively achieve intended results.

Clause 0.3.1 (Process Approach) states that "The application of the process approach in a quality management system enables understanding and consistency in meeting requirements, considering processes in terms of added value, and achieving effective process performance."

This aligns directly with option C, making it the correct answer. The other options are either partially correct or do not fully capture the purpose of the process approach:

Option A (Improvement based on interested parties) is a benefit but does not define the main goal.

Option B (Financial value) is not the primary focus of the process approach.

Option D (Reduction of resource consumption) may be an indirect benefit but is not a core objective.