Product responsibility in consumer-goods firms: A person who holds end-to-end responsibility for a product line (for example, a new instant coffee) in a firm is commonly called a:

Introduction / Context:
In fast-moving consumer goods (FMCG), ownership of a product's strategy, positioning, and performance is crucial. Different managerial titles exist, but one is particularly associated with stewarding a branded product's lifecycle and market success.

Given Data / Assumptions:

• Example domain: a new instant coffee product.
• We want the role charged with positioning, pricing, promotion, and P&L influence.
• We distinguish between project execution and ongoing product stewardship.

Concept / Approach:
A brand manager in FMCG owns the brand's equity, market strategy, and in-market performance. They coordinate R&D, supply chain, sales, and advertising, ensuring the product meets consumer needs and financial goals. A project manager manages timelines/resources for specific initiatives; a development manager focuses on R&D; a “market manager” is vague and not a standard title tied to a specific product brand.

Step-by-Step Solution:
Identify the industry archetype: FMCG brand stewardship.Map responsibilities: positioning, promotions, portfolio choices.Select the role that owns the brand P&L influence: brand manager.

Verification / Alternative check:
Job descriptions for brand managers at FMCG companies consistently list responsibility for product strategy, advertising, pricing, and cross-functional leadership.

Why Other Options Are Wrong:

• Project manager: Drives schedules, not brand strategy.
• Development manager: Focused on technical development, not full market stewardship.
• Market manager: Ambiguous, not the standard owner of a specific brand.
• None of the above: Incorrect because brand manager fits best.

Common Pitfalls:
Assuming product and project management are interchangeable; they overlap but have distinct scopes.

Final Answer:
brand manager