I have (many) assignments dates, for each date it has many assignments names, for each name it has its own time, for each time(assignment) it has many business activities, for each activity it has many operation sites. (Mind Map of the business has been attached below)
The user sould be able to reassign and delete the whole date (bulk of assignmets) or signle(or more) assignment
What is the best practice to represent this?


