In a team if someone gets stuck with the selected tasks for the iteration, what is the immediate next step?

The team member has to immediately inform the lead or onsite coordinator without wasting time and take up another task

Explanation:

In a situation where someone in a team is unable to move further to another tasks the next step is for the team member to immediately inform the onsite coordinator in order for them to take up another task reason been that the onsite coordinator sole responsibility is to ensure the completion of tasks without any flaw and Secondly if the team members did not inform the onsite coordinator immediately it will eventually lead to waste of time due to the time spent on the tasks thereby affecting the next tasks.

Therefore the immediate next step is for the team member to immediately inform the lead or onsite coordinator without wasting time and take up another task.