Brainstorming in the initial phase of problem-solving encourages open idea generation to explore possibilities without judgment, setting the stage for collaborative solutions.

Option A (Fosters discussion of ideas): Discussion occurs during brainstorming, but it is a byproduct, not the primary benefit, which is inclusive input.

Option B (Defines problem-solving roles and responsibilities): Roles are defined in team formation, not brainstorming.

Option C (Allows input from all team members): This is the correct answer. The NAHQ CPHQ study guide states, “The primary benefit of initial brainstorming is to allow input from all team members, ensuring diverse perspectives and inclusive idea generation” (Domain 4). This promotes creativity and engagement.

Option D (Focuses on identifying the best solutions): Initial brainstorming generates ideas, not evaluates or selects solutions, which occurs later.

CPHQ Objective Reference: Domain 4: Performance and Process Improvement, Objective 4.2, “Use collaborative techniques for problem-solving,” includes brainstorming for inclusive input. The NAHQ study guide notes, “Brainstorming ensures all team members contribute ideas, enhancing solution development” (Domain 4).

Rationale: Allowing all team members to contribute fosters inclusivity and creativity, the primary benefit of initial brainstorming, as per CPHQ’s improvement principles.