An organization with established processes for managing incidents, changes, and problems, receives a high volume...

 Value stream mapping is a technique that helps to understand the end-to-end flow of user support, from the demand to the value delivery. It is a tool that features in ITIL 4 Specialist: Create, Deliver and Support. Value stream mapping can help to identify the steps, activities, roles, responsibilities, tools, and outcomes involved in the user support process. It can also help to identify the value, waste, and opportunities for improvement in each step. Value stream mapping can help the organization to optimize the user support process and enhance the customer experience. Therefore, using value stream mapping is the first step the organization should take to start to improve the situation. The other options are not the first steps, but they could be considered after the value stream mapping is done. Reviewing skills and competencies of user support staff, improving the integration of tools, and encouraging teams to collaborate are all possible actions that could result from the value stream mapping analysis, but they are not the first step to understand the problem and the current state of the user support process. References:

ITIL 4 & swarming – finding the right people & process | Axelos1

Swarming vs Tiered Support Models Explained - BMC Software1

What ITSM Practitioners Need to Know About Value Stream Mapping2