Different tasks are assigned to different workers with respect to their area of work. These work tasks have to be completed within a given time frame so that upcoming tasks can be given to the worker and completed well in time. It is human nature that we forget things easily and do not remember as to when a certain thing was to be done. It is for this reason that the worker's to-do list is created.
In this list, the worker lists down the tasks which he needs to complete in order of preference i.e. the most important task is put first and the next important underneath it and so the list goes on. Apart from mentioning the most important task, the worker here also mentions the deadline within which the task is to be completed. In this way, the worker completes his lists of tasks well in time.