In an organisation, there are many groups who are tasked with their own duties. For a project, many of these groups are required to come together and formulate a plan for the execution for the tasks. Now, if one group finds that the plan put forward by the other group, is a bit unreasonable or difficult to execute in the time frame, the group can voice their concern to the other groups and the discussion can begin.
Even in a personal capacity, if we find that a situation or a plan seems tough or difficult, we usually voice our concerns towards the same.
Example of usage – “The designer voiced his concerns to his client, as he felt that the timeline put forward by the client was unreasonable.”