The first information necessary to effectively improve product design should come from the customer.
Customers provide direct feedback on their needs, preferences, and experiences with the product. This information is crucial for identifying areas of improvement, aligning product features with customer expectations, and ensuring the product meets market demands. Gathering customer insights through surveys, focus groups, and direct feedback helps manufacturers design products that better satisfy end-user requirements and enhances customer satisfaction.
References:
* "Voice of the Customer: Capture and Analyze Customer Requirements for Six Sigma Projects" by Kai Yang
* APICS Dictionary, 16th Edition

Building collaborative relationships with trading partners requires a foundational commitment from top management. This ensures that the initiative has the necessary support, resources, and alignment with the company's strategic goals. Commitment from leadership drives the cultural and organizational changes needed for effective collaboration. Subsequent steps include implementing technology for information sharing, documenting transaction rules, and organizing cross-enterprise teams.References:
* "Building Collaborative Relationships with Suppliers," Supply Chain Management Review.
* "The Role of Top Management in Supply Chain Collaboration," Journal of Business Logistics.