Enable debugging if it is not yet enabled. Install a new site Hack lib/classes/analytics/target/course_dropout.php and add a return true after the following comment // Not a valid target for training if there are not enough course accesses. Create 2 courses so they are setup this way (note these courses ids): both using topics or weeks format course1 with a start date in 2013 and end date in 2015 Enrol 1 students in course1 course2 with a start date in June 2014 and end date in April 2015 Enrol 3 students in course2 (note you will need to enrol them and later update enrolment start and end) One with timeend back in January 2014 One with timestart in March 2014 One with timestart in March 2013 In CLI: php admin/tool/analytics/cli/enable_model.php --modelid=1 --timesplitting="\core\analytics\time_splitting\quarters" In CLI: php admin/tool/task/cli/schedule_task.php --execute=\\tool_analytics\\task train_models You SHOULD see something like Analysable $ID is not valid for this target: The course is too long where $ID is course1 id Query the DB for select * from mdl_analytics_train_samples A single record SHOULD be returned and sampleids field should contain something like " {"3":3} " (where 3 is an integer, note it is an associative array json encoded, the important point is that it should only contain 1 element) Enrol 2 more students to course2 One with timestart today One with timestart in January 2015 In CLI: php admin/tool/task/cli/schedule_task.php --execute=\\tool_analytics\\task train_models Query the DB for select * from mdl_analytics_train_samples again A new record SHOULD have been created (2 in total) and sampleids field should contain something like " {"6":6} " (where 6 is an integer, note it is an associative array json encoded, the important point is that it should only contain 1 element)