Discuss the below ion detail:
Explain your current understanding about the field of supply chain and operations management. Please provide the following structure for discussion:
1. Outline the importance of supply chain management and operation management within product and service industries.
2. Offer examples from any of the materials covered
3. Provide academic reasoning for the critical need of supply chain management within the business environment.
Please ensure to provide a descriptive summary consisting of a minimum of 300 words.