Absolute Free ISTQB-Agile-Public Exam Practice for Comprehensive Preparation 

Allocate independent testers to design exploratory tests using test charters in time boxed sessions. Plan to run all sessions in parallel with each session lasting more than 5 hours.

Ask experienced testers to prepare test charters for time boxed sessions lasting no more than 2 hours. Tests should be designed and executed within each session using heuristics, creativity and intuition.

Ask experienced testers to try and find new defects by using the system without the constraint of documentation and tools.

Use testers who have not been involved in the sprint to write new test cases from the user stories. These test cases are then executed in a time boxed session for the sprint.