When across-functional team is assigned the task of improving a process, such as laboratory reporting time in the emergency room, the first step after identifying the problem is usually to understand the root causes of the problem. A fishbone diagram, also known as a cause and effect diagram or Ishikawa diagram, is a visual tool used to systematically identify and present all possible causes of a certain outcome1234.

In this case, the significant delay in receiving laboratory results is the problem that needs to be addressed. The team would use a fishbone diagram to identify and categorize potential reasons for this delay, such as equipment issues, process inefficiencies, human errors, etc. This step is crucial before developing action plans (Option D) because it ensures that the team’s efforts are directed towards addressing the root causes of the problem, rather than just the symptoms1234.

Options A (Identify the responsible individual) and C (Plot a scatter diagram) are not the immediate next steps in this scenario. Identifying a responsible individual is more about accountability after the root causes have been identified and action plans have been developed. A scatter diagram is a graphical tool used to understand the relationship between two variables and is not typically the next step in process improvement after identifying the problem1234.